Tootfinder

Charm production and fragmentation fractions at midrapidity in pp collisions at the LHC with ALICE
Renu Bala (for the ALICE Collaboration)
https://arxiv.org/abs/2506.21746

Charm production and fragmentation fractions at midrapidity in pp collisions at the LHC with ALICE
Heavy quarks, such as charm and beauty, possess masses significantly larger than the characteristic energy scale of Quantum Chromodynamics (QCD), and are thus predominantly produced in hard-scattering processes with large momentum transfer ($Q^{2}$). This makes them effective probes for verifying QCD calculations and investigating heavy-quark hadronization processes across various collision systems. Recent measurements of charm meson and baryon production in proton--proton (pp) collisions at th…

Weird Greco III 🇬🇷
怪异希腊 III 🇬🇷
📷 Nikon FE
🎞️Ilford FP4 Plus, expired 1994
buy me ☕️ ?/请我喝杯☕️？
#filmphotography

Impact of coherent wiggler radiation impedance in Tau-Charm factories
Tianlong He, Ye Zou, Demin Zhou, Hao Zhou, Hangzhou Li, Linhao Zhang, Tao Liu, Weiwei Li, Jingyu Tang
https://arxiv.org/abs/2507.22392

Impact of coherent wiggler radiation impedance in Tau-Charm factories
Coherent synchrotron radiation (CSR) has long been recognized as a significant source of longitudinal impedance driving microwave instability in electron storage rings. In the pursuit of higher luminosity, next-generation circular $e^+e^-$ colliders operating in the few-GeV energy range, such as B-factories and Tau-Charm factories, are being designed with low-emittance beams and high beam currents. Damping wigglers are commonly introduced to reduce damping times and control beam emittance. In t…

Camp Captures: Third time’s the charm https://www.dallascowboys.com/news/camp-captures-third-time-s-the-charm

The influence of electromagnetic fields on the generation of the directed and elliptic flows of heavy quark in relativistic heavy-ion collisions
Santosh K. Das, Olga Soloveva, Taesoo Song, Elena Bratkovskaya
https://arxiv.org/abs/2507.22620

The influence of electromagnetic fields on the generation of the directed and elliptic flows of heavy quark in relativistic heavy-ion collisions
We study the impact of self-generated electromagnetic fields (EMF) on the charm quarks momentum evolution in the partonic and hadronic medium created in heavy-ion collisions at RHIC energy within the Parton-Hadron-String Dynamics (PHSD) off-shell transport approach. In the quark-gluon plasma (QGP) phase, the charm quark interacts with the off-shell partons whose mass and widths are given by the Dynamical Quasi-Particle Model (DQPM), which can reproduce the lattice QCD thermodynamics. The backgr…

S-wave flavor-singlet meson mixing in QCD with light and charm quarks
Juan Andr\'es Urrea-Ni\~no, Jacob Finkenrath, Roman H\"ollwieser, Francesco Knechtli, Tomasz Korzec, Michael Peardon
https://arxiv.org/abs/2506.22132

S-wave flavor-singlet meson mixing in QCD with light and charm quarks
We investigate the mixing between flavor-singlet light meson and charmonium operators in the S-wave channels, i.e. pseudo-scalar and vector channel, at two different pion masses. We measure statistically significant non-zero correlations between operators with different quark content corresponding to off-diagonal entries of a flavor-singlet mixing correlation matrix. By solving a GEVP we extract the low-lying energy spectrum and compare it with the one obtained by the different types of operato…

Review on recent results of J/$\psi$ production at STAR
Jitka Mrazkova
https://arxiv.org/abs/2507.23516 https://arxiv.org/pdf/2507.23516

Review on recent results of J/$ψ$ production at STAR
Studying the production of J/$ψ$ (bound state of charm and anti-charm quark) in proton-proton collisions gives an opportunity to test quantum chromodynamics (QCD) calculations, as the production of J/$ψ$ involves both perturbative and non-perturbative processes. However, theoretical calculations are still unable to fully and simultaneously explain experimental results, such as polarization and $p_\text{T}$ spectra measured in different kinematic regimes and colliding energies. More studies ar…

$\lambda$ and $\rho$ Regge trajectories for bottom-charm tetraquarks $(bq)(\bar{c}\bar{q}')$ and $(cq)(\bar{b}\bar{q}')$
Jiao-Kai Chen, He Song, Xin-Ru Liu
https://arxiv.org/abs/2508.18899

$λ$ and $ρ$ Regge trajectories for bottom-charm tetraquarks $(bq)(\bar{c}\bar{q}')$ and $(cq)(\bar{b}\bar{q}')$
Using the newly proposed tetraquark Regge trajectory relations, we investigate three series of Regge trajectories for bottom-charm tetraquarks $(bq)(\bar{c}\bar{q}')$ and $(cq)(\bar{b}\bar{q}')$ with $q,q'=u,d,s$: the $ρ_1$-, $ρ_2$-, and $λ$-trajectories. We provide rough estimates for the masses of the $ρ_1$-, $ρ_2$-, and $λ$-excited states. Except for the $λ$-trajectories, the complete forms of the other two series of Regge trajectories for bottom-charm tetraquarks are lengthy and cumb…

Camp Captures: Third time’s the charm https://www.dallascowboys.com/news/camp-captures-third-time-s-the-charm

🌭 Vintage base ball: the charm of a sport where the 1860s never ended
https://www.theguardian.com/sport/2025/jul/17/vintage-base-ball-the-charm-of-a-sport-where-the-1860s-never-ended

🇺🇦 #NowPlaying on #BBC6Music's #LaurenLaverne
Avalon Emerson & The Charm:
🎵 Hot Evening
#AvalonEmerson #TheCharm
https://avalonemerson.bandcamp.com/track/hot-evening
https://open.spotify.com/track/1A0Cw6bYJirHpsxqbcun5d

This Is One of New York’s Most Scenic Hikes, with Endless Waterfalls, Fascinating Rock Formations, and Unique Charm
https://chasingch…

Another #hiking story is online! No mountains this time but along the shores of the river #Mangfall .
Tough to photograph on such a day. In autumn - with some fog - it must be great. But we really had a great day there!
See more of it:

Replaced article(s) found for hep-ex. https://arxiv.org/list/hep-ex/new
[1/1]:
- Studying charm hadronisation into baryons with azimuthal correlations of $\Lambda_{\rm c}^{ }$ wi...
ALICE Collaboration

Hadronic Molecules and $\chi_{cJ}(2P)$ Coupled States
Miyake Kotaro, Yasuhiro Yamaguchi
https://arxiv.org/abs/2507.21672 https://arxiv.org/pdf/2507.21672…

Hadronic Molecules and $χ_{cJ}(2P)$ Coupled States
We investigate hidden-charm exotic mesons based on a coupled-channel framework, where the physical states are described as superpositions of a compact $c\bar c$ core (identified with the $χ_{cJ}(2P)$ states) and hadronic components such as $D^{(*)}\bar D^{(*)}$. We incorporate meson exchange potentials to describe hadron-hadron interactions and determine model parameters to reproduce the observed masses of $X(3872)$ and $Z(3930)$. The model also predicts a $0^{++}$ bound state consistent with …

Replaced article(s) found for hep-ex. https://arxiv.org/list/hep-ex/new
[1/1]:
- Sensitivity Study of the Tau Lepton Electric Dipole Moment at the Super Tau-Charm Facility
Xulei Sun, Yongcheng Wu, Xiaorong Zhou

Mamdani Won Over N.Y.C. Democratic Voters. Can He Charm Washington? (New York Times)
https://www.nytimes.com/2025/07/20/nyregion/mamdani-democratic-party.html
http://www.memeorandum.com/250720/p9#a250720p9

Optics design of the Super Tau-Charm Facility collider rings
Ye Zou, Linhao Zhang, Tao Liu, Penghui Yang, Weiwei Li, Tianlong He, Demin Zhou, Kazuhito Ohmi, Sangya Li, Ze Yu, Yihao Mo, Hangzhou Li, Hao Zhou, Jiajun Gao, Zeyuan Meng, Qing Luo, Lei Wang, Youjin Yuan, Jingyu Tang
https://arxiv.org/abs/2507.18924…

Optics design of the Super Tau-Charm Facility collider rings
The Super Tau-Charm Facility (STCF), China's next-generation electron-positron collider, targets an unprecedented luminosity exceeding 5x10^34 cm^-2 s^-1 at a center-of-mass energy of 4 GeV. The implementation of a submillimeter vertical beta function at interaction point (< 1 mm) and crab-waist collision scheme in this low-energy regime introduces critical challenges through severe nonlinear effects that constrain dynamic aperture and degrade Touschek lifetime. To address these constraints, we…

Charm physics
David Friday, Evelina Gersabeck, Alexander Lenz, Maria Laura Piscopo
https://arxiv.org/abs/2506.15584 https://arxiv.org…

Charm physics
50 years after the discovery of the first charmed particle, charm physics continues to be an extremely lively field of research and a cornerstone in particle physics. The study of charm, with its unique properties, is characterised by many challenging but also exciting peculiarities, making it an ideal testing ground for Standard Model (SM) predictions and a very sensitive probe of new physics. This chapter is intended to provide a pedagogical introduction to the physics of the charm quark and …

Exploring small-angle emissions in charm quark jets in proton-proton collisions at $\sqrt{s}$ = 5.02 TeV
CMS Collaboration
https://arxiv.org/abs/2507.13469

Exploring small-angle emissions in charm quark jets in proton-proton collisions at $\sqrt{s}$ = 5.02 TeV
A measurement of the angular structure of jets containing a prompt D$^0$ meson and of inclusive jets in proton-proton collisions at the LHC at a center-of-mass energy of 5.02 TeV is presented. The data corresponding to an integrated luminosity of 301 pb$^{-1}$ were collected by the CMS experiment in 2017. Two jet grooming algorithms, late-$k_\mathrm{T}$ and soft drop, are used to study the intrajet radiation pattern using iterative Cambridge$-$Aachen declustering. The splitting-angle distributi…

"A commitment to continue to be appalled by the situation in Gaza. But not to be so appalled that either country would actually do anything about it."
https://www.theguardian.com/politics/2025/

Precise Measurement of Chromo-Electric Dipole Moment of the Charm Quark
BESIII Collaboration, et al.
https://arxiv.org/abs/2507.20618 https://arxiv.org/pdf…

Precise Measurement of Chromo-Electric Dipole Moment of the Charm Quark
The combined symmetry of charge conjugation and parity ($C\!P$) is tested in the hadronic transition $ψ(3686)\toπ^+π^{-}J/ψ$, utilizing a dataset of 2.7 billion $ψ(3686)$ events collected by the BESIII detector at the BEPCII collider. The resulting asymmetry observable is $A_{cp} = (0.6\pm1.8_{\rm stat}\pm0.1_{\rm sys})\times10^{-4}$ by combining the two channels $J/ψ\to e^+e^-$ and $J/ψ\toμ^+μ^-$ with unprecedented precision. Meanwhile, by considering the relationship between the chro…

Bilateral collaboration between Mexico and the United Kingdom for the construction of technical equipment (CHARM) for the Large Millimeter Telescope (LMT/GTM)
Paulina Carmona Rodriguez, Maria de la Paz Ramos-Lara
https://arxiv.org/abs/2506.11489

Bilateral collaboration between Mexico and the United Kingdom for the construction of technical equipment (CHARM) for the Large Millimeter Telescope (LMT/GTM)
The Large Millimeter Telescope Alfonso Serrano (LMT), is the largest millimeter radio telescope in the world, and was founded in 2006. This radio telescope is the final product of a collaboration agreement between Mexico and the United States in the 1990s. It is located on top of an extinct volcano in Mexico at an altitude of 4600 meters above sea level. In 2018, the University of Manchester and the Rutherford Appleton Laboratory signed an agreement with the Instituto Nacional de Astrofisica Op…

Park Discovery III 🏞️
公园探险 III 🏞️
📷 Nikon FE
🎞️Lucky SHD 400
buy me ☕️ ?/请我喝杯☕️？
#filmphotography

Yiding Cao Geld mit PayPal.Me senden
Folgen Sie dem Link PayPal.Me/dingsterdingster und geben Sie den Betrag ein. Es ist bequem und sicher. Sie haben noch kein PayPal-Konto? Kein Problem.

Triple-strangeness hidden-charm pentaquarks
Samson Clymton, Hyun-Chul Kim, Terry Mart
https://arxiv.org/abs/2508.12293 https://arxiv.org/pdf/2508.12293

Triple-strangeness hidden-charm pentaquarks
We investigate the possible existence of triple-strangeness hidden-charm pentaquark states in the off-shell coupled-channel formalism. The open-charm meson-baryon $\bar{D}_sΩ_c$, $\bar{D}_sΩ_c^*$, $\bar{D}_s^*Ω_c$, and $\bar{D}_s^*Ω_c^*$ channels are considered, together with the hidden-charm $J/ψΩ$ channel. The two-body kernel Feynman amplitudes are constructed from an effective Lagrangian based on hidden local symmetry and heavy-quark spin symmetry. The coupled Blankenbecler-Sugar equat…

Simulation of MAPS and a MAPS-based Inner Tracker for the Super Tau-Charm Facility
Ruiyang Zhang, Dongwei Xuan, Jiajun Qin, Lei Zhao, Le Xiao, Xiangming Sun, Lailin Xu, Jianbei Liu
https://arxiv.org/abs/2506.03712

Simulation of MAPS and a MAPS-based Inner Tracker for the Super Tau-Charm Facility
Monolithic Active Pixel Sensors (MAPS) are a promising detector candidate for the inner tracker of the Super Tau-Charm Facility (STCF). To evaluate the performance of MAPS and the MAPS-based inner tracker, a dedicated simulation workflow has been developed, offering essential insights for detector design and optimization. The intrinsic characteristics of MAPS, designed using several fabrication processes and pixel geometries, were investigated through a combination of Technology Computer Aide…

Analysis of the hidden-charm pentaquark candidates in the $J/\psi \Lambda$ mass spectrum via the QCD sum rules
Zhi-Gang Wang, Qi Xin
https://arxiv.org/abs/2508.17373 https://

Analysis of the hidden-charm pentaquark candidates in the $J/ψΛ$ mass spectrum via the QCD sum rules
In this work, we distinguish the isospin for the first time and study the diquark-diquark-antiquark type $udsc\bar{c}$ pentaquark states with zero isospin via the QCD sum rules systematically. We distinguish contributions of the pentaquark states with negative parity from positive parity unambiguously and obtain clean QCD sum rules for the pentaquark states with negative parity. Then we adopt the modified energy scale formula to choose the optimal energy scales of the QCD spectral densities, an…

There are any number of ways to keep Altadena affordable.
Ban single-family detached dwellings.
Ban off-street parking.
Build 6-story affordable housing on scattered sites.
The aim here is to maintain the area's high social status via exclusion. Based on uncool-ness rather than income or race.
[reply to: https://

🇺🇦 #NowPlaying on KEXP's #VarietyMix
Charm School:
🎵 Happiness is a Warm Sun
#CharmSchool
https://charmschool777.bandcamp.com/track/happiness-is-a-warm-sun-3
https://open.spotify.com/track/5SBLI4cXa5TfMnkOLXbTvr

I’ve been kicking around the joke idea that AI is the Crocs of computing (cheap garbage marketed as high fashion to children and super trendy for no lasting reason), but now I saw this cross my feed and I’m a little worried that they’re in my thoughts.
https://www.theverge.com/mi…

Microsoft’s Windows XP Crocs are no joke
Microsoft has created limited edition Windows XP-themed Crocs. The Crocs even come with a Clippy shoe charm.

Hello all!
I wasn't able to process the photos of my recent trips, but I wanted to share this one from last year.
I went there on a hot day to "take a couple of photos". In the end I spent 3h just at this waterfall searching for the right composition & interpretation, the right motive etc.
I love the result, but I'm surprised how much time I spent there to get it.

🇺🇦 Auf radioeins läuft...
Lalo Shifrin:
🎵 Operation Charm (from Mission: Impossible)
#NowPlaying #LaloShifrin
https://open.spotify.com/track/3Oq6VBtuJ5ZCa1JK3bJO9F

Search for a Higgs boson produced in association with a charm quark and decaying to a W boson pair in proton-proton collisions at $\sqrt{s}$ = 13 TeV
CMS Collaboration
https://arxiv.org/abs/2508.14988 …

Search for a Higgs boson produced in association with a charm quark and decaying to a W boson pair in proton-proton collisions at $\sqrt{s}$ = 13 TeV
This paper presents a search for a Higgs boson produced in association with a charm quark (cH) which allows to probe the Higgs-charm Yukawa coupling strength modifier $κ_\mathrm{c}$. Higgs boson decays to a pair of W bosons are considered, where one W boson decays to an electron and a neutrino, and the other \PW boson decays to a muon and a neutrino. The data, corresponding to an integrated luminosity of 138 fb$^{-1}$, were collected between 2016 and 2018 with the CMS detector at the LHC at a …

After all that bling of the last years I gladly spent my day today in Mate on Gentoo, dark theme, music et al and all just worked. The bulk of my applications are flatpaks, pipewire works like a charm and we're on kernel 6.15.5. If I could get this Waylandized we're done. Soothing. I'll throw in dwm over the weekend and retreat in my cave.

Determining the width of $D_{s0}^{*}(2317)$ by using $T_{c\bar{s}0}^{a}(2327)$ in a molecular frame
Zi-Li Yue, Quan-Yun Guo, Dian-Yong Chen, Elena Santopinto
https://arxiv.org/abs/2507.19641

Determining the width of $D_{s0}^{*}(2317)$ by using $T_{c\bar{s}0}^{a}(2327)$ in a molecular frame
Motivated by the recent observation of the open-charm tetraquark $T_{c\bar{s}0}^{a}(2327)$ by the LHCb Collaboration, as well as results from Lattice QCD calculations, we consider the $T_{c\bar{s}0}^{a}(2327)$ and the $D_{s0}^{*}(2317)$ as $DK$ molecular states, with $I(J^{P})$ equal to $1(0^{+})$ and $0(0^{+})$, respectively, and we investigate their strong decay behavior in an effective Lagrangian approach. Within the model parameter range, we can reproduce the $T_{c\bar{s}0}^{a}(2327)$ exper…

Mixing of heavy and light quarks in charmonium and light mesons
Francesco Knechtli, Jacob Finkenrath, Roman H\"ollwieser, Tomasz Korzec, Michael Peardon, Juan Andr\'es Urrea-Ni\~no
https://arxiv.org/abs/2508.19976

Mixing of heavy and light quarks in charmonium and light mesons
We study the system of light mesons, charmonium and glueballs in the flavor singlet scalar channel where they can mix. We use lattice QCD simulations with an almost physical charm quark and three degenerate light quarks for two values of the pion mass ($m_π \approx 420, 800$ MeV). Thanks to a variational basis which includes mesonic operators with profiles in distillation space, Wilson loops and two-pion operators we detect and show results of their mixing.

News from NA61/SHINE
Katarzyna Grebieszkow (for the NA61/SHINE Collaboration)
https://arxiv.org/abs/2508.15939 https://arxiv.org/pdf/2508.15939

News from NA61/SHINE
The main goal of the NA61/SHINE strong interaction program is to search for the critical point in the phase diagram of strongly interacting matter and to investigate phenomena related to the onset of deconfinement. In recent years, the program has expanded to include the study of open charm, aiming to understand the mechanisms of its production in heavy-ion collisions. This article presents a selection of recent results from the NA61/SHINE strong interaction program, including findings on parti…

Single- and double-heavy Hadronic Molecules
C. Hanhart
https://arxiv.org/abs/2508.20694 https://arxiv.org/pdf/2508.20694

Single- and double-heavy Hadronic Molecules
In this presentation the notion of hadronic molecules is reviewed and it is argued that some of the enigmatic single and double heavy mesons, namely the lowest lying positive parity open charm states, the $T_{cc}(3875)^+$ and the $χ_{c1}(3872)$ aka $X(3872)$, that do not fit into the conventional quark--anti-quark scheme in fact qualify as hadronic molecules. For the single heavy states we show that an alternative explanation as diquark--anti-diquark structure is at odds with either phenomenol…

Probing Partonic Evolution and Hadronization via Balance Functions and Correlations of Charmed Hadrons
Oveis Sheibani, Claude Pruneau, Victor Gonzalez, Sumit Basu, Alexandru Florin Dobrin, Yash Patley, Basanta Nandi, Sadhana Dash
https://arxiv.org/abs/2507.21014

Probing Partonic Evolution and Hadronization via Balance Functions and Correlations of Charmed Hadrons
Predictions of charm correlation functions and more specifically balance functions are presented in proton--proton (pp) collisions at sqrt(s_NN) = 13 TeV based on the PYTHIA 8.3 event generator. Correlations are computed for identical and cross-species charmed hadrons in both minimum bias and high-pT biased collisions. We study the strength of correlations as a function of the number of balanced flavors and investigate the impact of variations of PYTHIA parameters controlling the Lund string fr…

Trump Goes on a Charm Offensive as He Woos Holdout Republicans (New York Times)
https://www.nytimes.com/2025/07/02/us/politics/trump-bill-holdout-republicans.html
http://www.memeorandum.com/250702/p140#a250702p140

Strange pentaquarks with a hidden heavy quark-antiquark pair
Sachiko Takeuchi, Alessandro Giachino, Makoto Takizawa, Elena Santopinto, Makoto Oka
https://arxiv.org/abs/2507.20751

Strange pentaquarks with a hidden heavy quark-antiquark pair
The strange pentaquarks with hidden heavy quark pair ($q^3c\bar c$ and $q^3b \bar b$) are investigated by the coupled-channel quark cluster model. Two types of the $q^3$ color-octet configurations are found to provide the attraction, which makes bound states, sharp resonances, and cusps in the baryon meson scattering. A resonance appears at around 4500 MeV in the strange hidden charm sector. Such structures are more clearly seen in the hidden bottom systems.

This was a very nice loop between #ohlstadt and #garmischpartenkirchen!
Beautiful views to the #mountains, an excellent way, almost no major roads and we also escaped a little rain…

Cosmic Trajectories calculation with state of the art lattice QCD equation of state
Lorenzo Formaggio, Francesco Di Clemente, Geetika Yadav, Alessandro Drago, Claudia Ratti
https://arxiv.org/abs/2508.00094

Cosmic Trajectories calculation with state of the art lattice QCD equation of state
We compute the full cosmic trajectories of the early Universe across the QCD phase diagram as the plasma cools from $T\simeq500\,$MeV to $30\,$MeV, assuming $β$-equilibrated matter. The trajectories are obtained by simultaneously solving baryon-number, electric-charge, and lepton-asymmetry conservation, closed by a state-of-the-art lattice-QCD equation of state: a fourth-order Taylor expansion in the chemical potentials that merges the latest $(2\!+\!1)$-flavor susceptibilities with charm-quar…

A Low Power Monolithic Active Pixel Sensor Prototype for the STCF Inner Tracker
Dongwei Xuan, Ruiyang Zhang, Jiajun Qin, Hao Han, Xinyu Bin, Zihan Xu, Lei Zhao, Jianbei Liu, Liang Zhang, Anqing Wang, Aodong Song, Xiangming Sun, Le Xiao, Lailin Xu
https://arxiv.org/abs/2506.01643

A Low Power Monolithic Active Pixel Sensor Prototype for the STCF Inner Tracker
The Super Tau-Charm Facility (STCF) is a proposed e+e- collider with a peak luminosity 100 times higher than that of the present tau-charm factory. The inner tracker (ITK) of STCF should feature a low material budget and high readout speed. Under these requirements, the monolithic active pixel sensor (MAPS) is considered as a promising candidate for the ITK. To minimize the power consumption of MAPS (for low material budget), larger-size sensors are proposed to reduce the scale of the readout c…

Lattice QCD Study of Positive Parity Dibaryons with Maximal Charm and Strangeness
Navdeep Singh Dhindsa, Nilmani Mathur, M. Padmanath
https://arxiv.org/abs/2507.10660

Lattice QCD Study of Positive Parity Dibaryons with Maximal Charm and Strangeness
We present the ground-state energy spectra of dibaryons composed of single-flavor quarks, specifically systems with strangeness $\mathcal{S} = -6$ and charm $\mathcal{C} = 6$. Our lattice QCD study is based on $N_f=2+1+1$ MILC ensembles with highly improved staggered quark (HISQ) sea quarks, spanning four lattice spacings and two spatial volumes. We employ valence quark propagators realized using a relativistic overlap action, evaluate correlation matrices with carefully designed operator bases…

Prospects for $P$ and $C\!P$ violation in $\Lambda_{c}^{ }$ decays with polarized beam at Super Tau-Charm Facility
Hong-Jian Wang, Cheng Wang, Hao Sun, Pei-Rong Li, Xiao-Rui Lyu, Rong-Gang Ping
https://arxiv.org/abs/2508.12217

Prospects for $P$ and $C\!P$ violation in $Λ_{c}^{+}$ decays with polarized beam at Super Tau-Charm Facility
Weak decays of the charmed baryons offer an ideal platform to study parity ($P$) and charge conjugation-parity ($C\!P$) violation in quark sector, to stringently test the Standard Model and search for new physics. It is a key goal in the next-generation positron-electron collider, such as the Super Tau-Charm Facility (STCF). Thanks to the quantum-entangled pair production with super high luminosity and the possibility of beam polarization, STCF provides a unique environment to probe such symmet…

This #photo is pretty soon after the first photo that I posted. I was on the way up and turned around to see the nice little meadow that I just crossed.
The #trail winding through the meadow with the trees around and the

Emergence of charm-strange dibaryons with negative parity via baryon-baryon interactions
Yu-Yue Cui, Xiao-Mei Tang, Qi Huang, Rui Chen
https://arxiv.org/abs/2507.12958

Emergence of charm-strange dibaryons with negative parity via baryon-baryon interactions
Within the framework of the one-boson-exchange model, we systematically perform a coupled channel analysis of the $P-$wave interactions between a charm baryon and light baryon, the involved channels include $Ξ_cN$, $Λ_cΣ$, $Ξ_c^{\prime}N$, $Σ_cΛ$, $Ξ_c^*N$, $Σ_c^*Λ$, $Σ_cΣ$, and $Σ_c^*Σ$. Our results can predict several possible molecular candidates, such as a $Ξ_c^{\prime}N$ molecule with $I(J^P)=0(1^-)$, $Ξ_c^{*}N$ molecules with $0(0^-, 1^-, 2^-)$, $Σ_cΣ$ molecules with $0(1…

Replaced article(s) found for nucl-ex. https://arxiv.org/list/nucl-ex/new
[1/1]:
- Multiplicity dependence of charm baryon and charm meson production in pPb collisions at $\sqrt{s_...
CMS Collaboration

Strong decays of newly observed charm-strange meson states based on a relativistic model
Bhoomika Pandya, Manan N Shah, P C Vinodkumar
https://arxiv.org/abs/2507.11022

Strong decays of newly observed charm-strange meson states based on a relativistic model
The mass spectra of charm-strange mesons including ground, radial and orbital excitations have been calculated within a relativistic Dirac framework. The predicted masses of the ground state $1S$ and the first orbital excited state $1P$ exhibits excellent agreement with values reported by the PDG. Utilizing these mass predictions and an effective Lagrangian approach based on heavy quark and chiral symmetries, we have computed the OZI allowed two body strong decay widths of higher excited state …

Determination of the spin and parity of all-charm tetraquarks
CMS Collaboration
https://arxiv.org/abs/2506.07944 https://arxiv.org/pd…

Determination of the spin and parity of all-charm tetraquarks
The traditional quark model accounts for the existence of baryons, such as protons and neutrons, which consist of three quarks, as well as mesons, composed of a quark-antiquark pair. Only recently has substantial evidence started to accumulate for exotic states composed of four or five quarks and antiquarks. The exact nature of their internal structure remains uncertain. This paper reports the first measurement of quantum numbers of the recently discovered family of three all-charm tetraquarks,…

Natura Urbana VIII 🏡
城市自然 VIII 🏡
📷 Nikon FE
🎞️Ilford FP4 Plus, expired 1995
buy me ☕️ ?/请我喝杯☕️？
#filmphotography

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Folgen Sie dem Link PayPal.Me/dingsterdingster und geben Sie den Betrag ein. Es ist bequem und sicher. Sie haben noch kein PayPal-Konto? Kein Problem.

Inclusive open charm photoproduction in ultraperipheral collisions at the LHC with G$\gamma$A-FONLL
Matteo Cacciari, Gian Michele Innocenti, Anna M. Sta\'sto
https://arxiv.org/abs/2506.09893

Inclusive open charm photoproduction in ultraperipheral collisions at the LHC with G$γ$A-FONLL
We compute the inclusive $D^{0}$ production cross section in ultraperipheral Pb-Pb collisions at the LHC as a function of the $D^{0}$ transverse momentum and rapidity. These calculations are carried out within the new G$γ$A-FONLL (Generalized Photon-Nucleus FONLL) framework, which can predict photonuclear cross sections for charm and beauty hadrons in electron-proton, electron-nucleus, and ultraperipheral heavy-ion collisions. The framework relies on FONLL (Fixed-Order Next-to-Leading Logarith…

Pinpointing Physical Solutions in Y(4230) Decays
Jie Yuan, Yadi Wang, Kai Zhu
https://arxiv.org/abs/2508.17204 https://arxiv.org/pdf/2508.17204

Pinpointing Physical Solutions in Y(4230) Decays
To resolve ambiguities from multiple solutions in experimental measurements, we construct a $χ^2$ function incorporating constraints such as isospin conservation and amplitude relations. By minimizing the global $χ^2$, we identify physical solutions for seven hidden-charm decay channels of $Y(4230)$, revealing a small strange quark component. Crucially, the physical solution for $Y(4230) \to π^{+}π^{-} J/ψ$ corresponds to the smallest among four experimental solutions, potentially signific…

Probing flavor effects in QCD showers with heavy-flavor jets
Emma Yeats (on behalf of the ALICE Collaboration)
https://arxiv.org/abs/2506.13928 https://

Probing flavor effects in QCD showers with heavy-flavor jets
Measurements of jet substructure provide precise tests of Quantum Chromodynamics (QCD) and offer a distinct way to study hadronization mechanisms, compared to measurements of hadrons alone. QCD predicts that jet radiation patterns depend on the mass and color charge of the initiating parton. Parton showers, in particular, are sensitive to the Casimir factors of quarks and gluons, as well as the parton mass due to the dead-cone effect. Three key charm-tagged jet measurements from the ALICE exper…

Search for Higgs boson decay to a charm quark-antiquark pair via $t\bar{tH}$ production
Sebastian Wuchterl (on behalf of the CMS Collaboration)
https://arxiv.org/abs/2506.02163

Search for Higgs boson decay to a charm quark-antiquark pair via $t\bar{tH}$ production
In these proceedings, a search for the standard model Higgs boson decaying to a charm quark-antiquark pair, $H\to c\bar{c}$, produced in association with a top quark-antiquark pair ($t\bar{tH}$) is presented. The search is performed using proton-proton collision data collected by the CMS experiment at $s=13$ TeV, corresponding to an integrated luminosity of 138 fb$^{-1}$. The Higgs boson decay to a bottom quark-antiquark pair is measured simultaneously and the observed $t\bar{tH(H\to bb)}$ even…

Masses of hidden-charm pentaquark states with $J^P = \frac{3}{2}^-$
Tao Li, Hao-Song Li
https://arxiv.org/abs/2507.02502 https://arxi…

Masses of hidden-charm pentaquark states with $J^P = \frac{3}{2}^-$
Within the heavy pentaquark chiral perturbation theory, we calculate the chiral corrections for $J^P=\frac{3}{2}^-$ octet hidden-charm pentaquark masses up to next-to-leading order. Taking the LHCb-reported $P_ψ^N(4440)$ and $P_{ψs}^Λ(4459)$ (with $J^P=\frac{3}{2}^-$) as inputs, we predict the other two octet hidden-charm pentaquark states $P_{ψs}^Σ(4483)$ and $P_{ψss}^{N}(4490)$ with $J^P=\frac{3}{2}^-$. The results provide theoretical guidance for the further search of $P_{ψs}^Σ$ and …

New limits on CPT-Symmetry Violation in Charm mesons
W. Krzemien, M . Kmiec, A. Szabelski, W. Wislicki
https://arxiv.org/abs/2507.05457 https://

New limits on CPT-Symmetry Violation in Charm mesons
Neutral flavour meson oscillations are a fascinating quantum phenomenon that allows for high-precision tests of fundamental symmetries, including CPT invariance. In this contribution, we present the methodology for testing CPT violation in neutral flavour meson systems, with particular emphasis on the charm sector. We report the recently established constraints on CPT-violating effects, derived from a reinterpretation of the LHCb measurement of the time-dependent asymmetry in the Cabibbo-favour…

Multiplicity dependence of $\Xi_c^ $ and $\Xi_c^0$ production in pp collisions at $\sqrt{s} = 13$ TeV
ALICE Collaboration
https://arxiv.org/abs/2508.09955 https://

Multiplicity dependence of $Ξ_c^+$ and $Ξ_c^0$ production in pp collisions at $\sqrt{s} = 13$ TeV
The first measurement at midrapidity ($|y| < 0.5$) of the production yield of the strange-charm baryons $Ξ_c^+$ and $Ξ_c^0$ as a function of charged-particle multiplicity in proton-proton collisions at $\sqrt{s} = 13$ TeV with the ALICE experiment at the LHC is reported. The $Ξ_c^+$ baryon is reconstructed via the $Ξ_c^+ \rightarrow Ξ^-π^+π^+$ decay channel in the range $4 < p_{\rm T} < 12$ GeV/$c$, while the $Ξ_c^0$ baryon is reconstructed via both the $Ξ_c^0 \rightarrow Ξ^…

Systematic study of charm meson M1 radiative transitions
Binesh Mohan, Christas Mony A., Rohit Dhir
https://arxiv.org/abs/2506.10560 https://

Systematic study of charm meson M1 radiative transitions
Motivated by recent experimental advancements in the study of radiative decays of charmed mesons, we investigate the magnetic (transition) moments of vector mesons by applying the effective mass scheme, obtained from the one-gluon exchange interaction between quark-antiquark pairs. By incorporating high-precision experimental data from both heavy and light flavor sectors, we accurately account for the strong hyperfine interaction contributions to the quark and antiquark masses within mesons. We…

Assessing the lattice QCD space diffusion coefficient and the thermalization time of charm quark by mean of D meson observables at LHC
Maria Lucia Sambataro (Department of Physics and Astronomy, University of Catania, Catania, Italy, INFN-Laboratori Nazionali del Sud, Catania, Italy), Vincenzo Minissale (Department of Physics and Astronomy, University of Catania, Catania, Italy, INFN Sezione di Catania, Catania, Italy), Salvatore Plumari (Department of Physics and Astronomy, University…

Assessing the lattice QCD space diffusion coefficient and the thermalization time of charm quark by mean of D meson observables at LHC
A central goal in the study of heavy-flavour production is to determine the interaction strength between Heavy Quarks (HQs) and the Quark-Gluon Plasma (QGP), quantified by the spatial diffusion coefficient $D_s(T)$. Recent lattice QCD (lQCD) results with dynamical fermions suggest a remarkably low value of $2πT D_s \approx 1$ at $T=T_c$ for charm quarks - significantly lower than both quenched QCD estimates and most phenomenological models - which typically yield $2πT D_s \approx 3.5 - 5$. Th…

Production of $J/\psi p \bar p$ in electron-positron collisions
Xiao-Yu Zhang, Yi-Lin Song, Feng-Kun Guo
https://arxiv.org/abs/2508.08694 https://arxiv.org…

Production of $J/ψp \bar p$ in electron-positron collisions
The discoveries of the hidden-charm $P_c$ pentaquarks by the LHCb Collaboration have been not confirmed by other experiments yet. It is desirable to investigate the feasibility of observing them in other experiments. We present an order-of-magnitude estimate of the cross section of the $e^+e^-\to J/ψp \bar p$ process, where the hidden-charm pentaquarks may be searched for, and find it to be of $\mathcal{O}(4~\text{fb})$ when the $e^+e^-$ c.m. energy is around 6 GeV. The cross section for $e^+e…

Measurement of the $\Omega_c^0$ and $\Xi_c^0$ baryon lifetimes using hadronic $b$-baryon decays
LHCb collaboration, et al.
https://arxiv.org/abs/2506.13334

Measurement of the $Ω_c^0$ and $Ξ_c^0$ baryon lifetimes using hadronic $b$-baryon decays
The lifetimes of the $Ω_c^0$ and $Ξ_c^0$ baryons are measured using a $pp$ collision dataset collected by the LHCb experiment, corresponding to an integrated luminosity of $9~\rm{fb^{-1}}$. The charm baryons are produced in the fully reconstructed decay chains $Ω_b^- \rightarrow Ω_c^0 (\rightarrow pK^-K^-π^+)~π^-$ and $Ξ_b^- \rightarrow Ξ_c^0 (\rightarrow pK^-K^-π^+)~π^-$. The measurement uses topologically and kinematically similar $B^- \rightarrow D^0(\rightarrow K^-K^+π^-π^+)~π^…

Probing Nucleon-$\Omega_{\rm ccc}$Interaction via Lattice QCD at Physical Quark Masses
Liang Zhang, Takumi Doi, Yan Lyu, Tetsuo Hatsuda, Yu-Gang Ma
https://arxiv.org/abs/2508.10388

Probing Nucleon-$Ω_{\rm ccc}$Interaction via Lattice QCD at Physical Quark Masses
We study the S-wave interactions between the nucleon ($N$) and the triply charmed Omega baryon ($Ω_{\mathrm{ccc}}$) using (2+1)-flavor lattice QCD with a physical pion mass ($m_π\simeq 137.1$ MeV) on a lattice volume $\simeq (8.1~\mathrm{fm})^3$. The charm quark is implemented with a relativistic heavy-quark action at its physical mass. Employing the time-dependent HAL QCD method, the $N$-$Ω_{\mathrm{ccc}}$ potentials in the spin-1 ($^3\mathrm{S}_1$) and spin-2 ($^5\mathrm{S}_2$) channels ar…

Prompt atmospheric leptons and the potential role of intrinsic charm
Laksha Pradip Das, Diksha Garg, Maria Vittoria Garzelli, Mary Hall Reno, G\"unter Sigl
https://arxiv.org/abs/2508.06473

Prompt atmospheric leptons and the potential role of intrinsic charm
The all-sky very-high energy ($10^4-10^6$ GeV) atmospheric muon flux is most recently measured by IceCube, where in the higher energy range, the spectrum hardens indicating a prompt component. IceCube also measures the atmospheric muon neutrino flux at high energy. Since this is dominated by the astrophysical flux, they are only able to set an upper bound on the prompt atmospheric muon neutrino flux contribution. We provide a new evaluation of the prompt atmospheric muon flux including for the …

The Rise of Particle Physics
S. Ting, H. Georgi, J. Iliopoulos, L. Maiani, A. De Rujula, L. Di Lella, S. Myers, F. Marion, M. Pierini, G. Martinelli, R. Barbieri, G. Battimelli, L. Bonolis, M. Greco, G. Parisi
https://arxiv.org/abs/2507.14275

The Rise of Particle Physics
Discovery of the J Particle at Brookhaven National Laboratory and the Physics of Electrons and Positrons; The Standard Model Yesterday, Today and Tomorrow; The Rise of Gauge Theories: From Many Models to One Theory; From Charm to CP Violation; When the Standard Model Was Ignored; The Discovery of the W and Z Bosons at the CERN Proton-Antiproton Collider; A Personal History of CERN Particle Colliders (1972-2022); The Age of Gravitational Wave Astronomy; Precision Physics in the Era of (HL)LHC; R…

Electromagnetic probes revealing the inner structure of the $\Lambda_c(2940)$
Ping Chen, Zi-Le Zhang, Yu Zhuge
https://arxiv.org/abs/2506.15428 https://

Electromagnetic probes revealing the inner structure of the $Λ_c(2940)$
The $Λ_c(2940)$, an open-charm baryon discovered in 2006, has sparked interest due to its ``low mass puzzle'', paralleling the $X(3872)$ in the charmoniumlike sector. Both states challenge conventional hadronic interpretations, with the $X(3872)$ understood as a $D^*\bar{D}$ molecular state and the $Λ_c(2940)$ hypothesized as a $D^*N$ molecular state. This work investigates the radiative decay modes $Λ_c(2940) \to Λ_c(2286)γ$, $Λ_c(2940) \to Λ_c(2595)γ$, and $Λ_c(2940) \to Λ_c(2765)γ…

Unravelling Pentaquarks with Born--Oppenheimer effective theory
Nora Brambilla, Abhishek Mohapatra, Antonio Vairo
https://arxiv.org/abs/2508.13050 https://…

Unravelling Pentaquarks with Born--Oppenheimer effective theory
The hidden-charm pentaquark states $P_{c\bar{c}}\left(4312\right)^+$, $P_{c\bar{c}}\left(4380\right)^+$, $P_{c\bar{c}}\left(4440\right)^+$, and $P_{c\bar{c}}\left(4457\right)^+$, all with isospin $I = 1/2$, were discovered by the LHCb collaboration in the decay process $Λ_b^0 \to J/ψp K^-$. Although their quantum numbers remain undetermined, these states have generated significant theoretical interest. We analyze their spectrum and decay patterns-including those of their spin partners-within …

Linearly Polarized Photon Fusion as a Precision Probe of the Tau Lepton Dipole Moments at Lepton Colliders
Ding Yu Shao, Hao Xiang, Fang Xu, Bin Yan, Cheng Zhang
https://arxiv.org/abs/2506.15245

Linearly Polarized Photon Fusion as a Precision Probe of the Tau Lepton Dipole Moments at Lepton Colliders
We present a comprehensive investigation into the anomalous magnetic dipole moment ($a_τ$) and electric dipole moment ($d_τ$) of the $τ$ lepton using the $γγ\to τ^+τ^-$ process at future lepton colliders, with the Super Tau-Charm Facility serving as a benchmark. By employing transverse-momentum-dependent factorization, we introduce novel observables derived from $\cos2ϕ$, $\sin2ϕ$, and $\cos4ϕ$ azimuthal asymmetries to precisely probe the $τ$ lepton's electromagnetic structure. Our a…

First observation of quantum correlations in $e^ e^-\to XD\bar{D}$ and $C$-even constrained $D\bar{D}$ pairs
BESIII Collaboration, et al.
https://arxiv.org/abs/2506.07906

First observation of quantum correlations in $e^+e^-\to XD\bar{D}$ and $C$-even constrained $D\bar{D}$ pairs
The study of meson pairs produced with quantum correlations gives direct access to parameters that are challenging to measure in other systems. In this Letter, the existence of quantum correlations due to charge-conjugation symmetry $C$ are demonstrated in $D\bar{D}$ pairs produced through the processes $e^+e^-\to D\bar{D}$, $e^+e^- \to D^{*}\bar{D}$, and $e^+e^- \to D^{*} \bar{D}^*$, where the lack of charge superscripts refers to an admixture of neutral-charm-meson particle and antiparticle s…

The spectra of $bc\bar{b}\bar{c}$ tetraquark states from a diquark-antidiquark perspective
Zhen-Yang Wang, Jing-Juan Qi, Zhen-Hua Zhang, Xin-Heng Guo
https://arxiv.org/abs/2508.12366

The spectra of $bc\bar{b}\bar{c}$ tetraquark states from a diquark-antidiquark perspective
Within the diquark-antidiquark framework, this study investigates the masses of ground-state tetraquarks composed of heavy charm ($c$) and bottom ($b$) quarks and antiquarks, using the Bethe-Salpeter formalism. We establish the Bethe-Salpeter equations for the fully heavy $bc\bar{b}\bar{c}$ tetraquarks to the leading order in $1/m_Q$ expansion. These equations are subsequently solved numerically under the covariant instantaneous approximation with kernels containing scalar confinement and one-g…

Flavoured jet algorithms: a comparative study
Arnd Behring, Simone Caletti, Francesco Giuli, Radoslaw Grabarczyk, Andreas Hinzmann, Alexander Huss, Joey Huston, Ezra D. Lesser, Simone Marzani, Davide Napoletano, Rene Poncelet, Daniel Reichelt, Alberto Rescia, Gavin P. Salam, Ludovic Scyboz, Federico Sforza, Andrzej Siodmok, Giovanni Stagnitto, James Whitehead, Ruide Xu

Flavoured jet algorithms: a comparative study
The accurate identification of heavy-flavour jets, those which originate from bottom or charm quarks, is crucial for precision studies of the Standard Model and searches for new physics. However, assigning flavour to jets presents significant challenges, primarily due to issues with infrared and collinear (IRC) safety. This paper aims to address these challenges by evaluating recently-proposed jet algorithms designed to be IRC-safe and applicable in high-precision measurements. We compare these…

Measurement of the $ D^{0}\rightarrow K^{-}\pi^{ }e^{ }e^{-} $ branching fraction and search for $ D^{0}\rightarrow \pi^{ }\pi^{-}e^{ }e^{-} $ and $D^{0}\rightarrow K^{ }K^{-}e^{ }e^{-} $ decays at Belle
Belle, et al.
https://arxiv.org/abs/2507.05050

Measurement of the $ D^{0}\rightarrow K^{-}π^{+}e^{+}e^{-} $ branching fraction and search for $ D^{0}\rightarrow π^{+}π^{-}e^{+}e^{-} $ and $D^{0}\rightarrow K^{+}K^{-}e^{+}e^{-} $ decays at Belle
We present a study of the rare charm meson decays $ D^{0}\rightarrow K^{+}K^{-}e^{+}e^{-} $, $ π^{+}π^{-}e^{+}e^{-} $, and $ K^{-}π^{+}e^{+}e^{-} $ using a 942 fb$^{-1}$ data set collected by the Belle detector at the KEKB asymmetric-energy $ e^{+}e^{-} $ collider. We use $ D^{0} $ candidates identified by the charge of the pion in $ D^{*} \rightarrow D^{0} π$ decays and normalize the branching fractions to $ D^{0} \rightarrow K^{-}π^{+}π^{-}π^{+} $ decays. The branching fraction for dec…

The $\eta$-$\eta'$ mixing and its application in the $B^ /D^ /D_s^ \to\eta^{(\prime)}\ell^ \nu_\ell$ decays
Yu-Jie Zhang, Xing-Gang Wu, Dan-Dan Hu, Long Zeng
https://arxiv.org/abs/2506.13214

The $η$-$η'$ mixing and its application in the $B^+/D^+/D_s^+\toη^{(\prime)}\ell^+ ν_\ell$ decays
In this paper, we take into account the intrinsic charm and gluonic contents into the $η-η^\prime$ mixing scheme and formulate the tetramixing $η-η^\prime-G-η_c$ to study the mixing properties of $η^{(\prime)}$ mesons. Using the newly derived mixing parameters, we calculate the transition form factors (TFFs) of $B^+/D^+/D_s^+\toη^{(\prime)}$ within the QCD light-cone sum rules up to next-to-leading order QCD corrections and twist-4 contributions. Using the extrapolated TFFs, we then calc…

Exotic Heavy Hadrons
H- Garcilazo, A. Valcarce
https://arxiv.org/abs/2508.11483 https://arxiv.org/pdf/2508.11483 …

Exotic Heavy Hadrons
We review our recent findings on the structure and properties of exotic heavy hadrons, focusing on two main topics. First, we examine the role of correlations driven by the short-range Coulomb-like color interaction in hidden heavy-flavor pentaquarks. We show how this framework consistently accounts for the observed pattern of $P_c$ and $P_{cs}$ states in the hidden-charm sector and enables predictions for the hidden-bottom sector, where experimental data are still lacking. The second topic exp…

Study of anisotropic flow of heavy hadrons in Au Au collisions at $\sqrt{s_{NN}} =$ 200 GeV using HYDJET framework
Sunidhi Saxena, Gauri Devi, Rajiv Gupta, Ajay Kumar
https://arxiv.org/abs/2506.12373

Study of anisotropic flow of heavy hadrons in Au + Au collisions at $\sqrt{s_{NN}} =$ 200 GeV using HYDJET++ framework
A comprehensive study of the anisotropic flow of heavy hadrons ($D^{0}$, $D^{\pm}$, and $Λ_{c}$) in Au + Au collisions at $\sqrt{s_{NN}} = 200$ GeV using the HYDJET++ model is presented. This study aims to explore the collective behavior and thermalization of charm hadrons at RHIC energy. The modeling of anisotropic flow is performed using a centrality-dependent parameterization of anisotropic parameters. Our model results are consistent with STAR experimental results up to $p_{T} = 4$ GeV/c. …

Personal Memories of 50 Years of Quarkonia
John Ellis
https://arxiv.org/abs/2506.10643 https://arxiv.org/pdf/2506.10643

Personal Memories of 50 Years of Quarkonia
The world of particle physics was revolutionised in November 1974 by the discovery of the J/psi particle, the first particle to be identified as a quarkonium state composed of charm quarks and antiquarks. The charmonium interpretation of the J/psi was cemented by the subsequent observations of a spectrum of related c \bar c states, and finally by the discovery of charmed particles in 1976. The discovery of charmonium was followed in 1977 by the discovery of bottomonium mesons and particles cont…

A comprehensive analysis of Drell-Yan production uncertainties and mass effects at moderate and low dilepton masses
Ekta Chaubey, Claude Duhr, Rhorry Gauld, Pooja Mukherjee
https://arxiv.org/abs/2508.08956

A comprehensive analysis of Drell-Yan production uncertainties and mass effects at moderate and low dilepton masses
We present a thorough investigation of the sources of uncertainties to the Drell-Yan production using state-of-the-art predictions for both neutral and charged current channels, focusing on the low invariant mass region. Differential predictions for the invariant mass spectrum are provided at N$^3$LO supplemented with exact charm and bottom quark mass effects calculated at $\mathcal{O}(α_s^2)$. The impact of PDF choices (including approximate N$^3$LO), scale variations, the variation of the st…

This https://arxiv.org/abs/2506.01272 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_hepp…

Hadrons in group expansion
Various approximate symmetries exist in nature. For example, the flavor $SU(4)$ symmetry involving the $up/down/strange/charm$ quarks is severely broken, the flavor $SU(3)$ symmetry involving the $up/down/strange$ quarks is moderately broken, and the isospin $SU(2)$ symmetry involving the $up/down$ quarks is slightly broken. These broken symmetries are primarily governed by the strong interaction, making them an ideal platform for investigating the general behavior of approximate symmetries. To…

Radially Excited Bottom Mesons in Heavy Quark Effective Theory
Ritu Garg, Preeti Bhall, K. K Vishwakarma
https://arxiv.org/abs/2506.08069 https://

Radially Excited Bottom Mesons in Heavy Quark Effective Theory
In this paper, Heavy Quark Effective Theory (HQET) is employed to investigate experimentally missing radially excited bottom-meson states. It is an extension of our previous work, in which we had applied HQET for the calculation of charm mesons. By incorporating both theoretical insights and available experimental data on charmed mesons with flavor-symmetry parameters, we computed masses of radially excited bottom-meson states with their strange partners. In addition, decay widths are calculate…

Femtoscopy of $DN$ and $\bar{D}N$ systems
Mikel F. Barbat, Juan M. Torres-Rincon, Angels Ramos, Laura Tolos
https://arxiv.org/abs/2507.07864 https://

Femtoscopy of $DN$ and $\bar{D}N$ systems
The capability of the ALICE@LHC and STAR@RHIC experiments to reconstruct $D$ mesons has enabled femtoscopic correlation measurements of open-charm mesons in both small and large systems. In this work, we present a theoretical calculation of the correlation functions of $D$ and $\bar{D}$ mesons with nucleons, based on the Koonin-Pratt formalism applied to the systems produced in these high-energy collisions. We use an effective Lagrangian that models the interaction between charmed mesons and ba…

Hidden-Heavy Pentaquarks and Where to Find Them
Fareed Alasiri, Eric Braaten, Roberto Bruschini
https://arxiv.org/abs/2507.06991 https://

Hidden-Heavy Pentaquarks and Where to Find Them
We provide a simple explanation for the observed hidden-charm pentaquarks as bound states in Born-Oppenheimer potentials. We identify $P_{c\bar{c}}(4312)^+$, $P_{c\bar{c}}(4380)^+$, $P_{c\bar{c}}(4440)^+$, and $P_{c\bar{c}}(4457)^+$ as the heavy-quark spin states in a quartet of $c \bar{c}$ pentaquarks with $J^P$ quantum numbers $\frac{1}{2}^-$, $\frac{3}{2}^-$, $\frac{3}{2}^-$, and $\frac{5}{2}^-$. The quantum numbers of $P_{c\bar{c}}(4457)^+$ differ from all previous predictions. We identify …

An interpretation of the fully-charmed scalar state $X(6200)$ as a molecular di-meson
\"O. E. Demircan, H. Da\u{g}, H. Sundu, J. Y. S\"ung\"u, E. V. Veliev
https://arxiv.org/abs/2506.08589

An interpretation of the fully-charmed scalar state $X(6200)$ as a molecular di-meson
The LHCb Collaboration recently observed new structures in the invariant mass spectrum of $J/ψJ/ψ$ meson pairs produced in proton-proton collisions, including a narrow peak around $6.2$ GeV. This study investigates the thermal behavior of this newly discovered fully-charm resonance, assuming it to be an $η_cη_c$ molecule with quantum numbers $J^{PC} = 0^{++}$. Employing thermal QCD sum rules up to dimension four, we analyze the temperature dependence of the mass and the decay constant. Our …

Light scalar mesons in D^ , D_s^ decays into three pseudoscalars
L. Maiani, A. D. Polosa, V. Riquer
https://arxiv.org/abs/2508.02884 https://arxiv.org/pdf…

Light scalar mesons in D^+, D_s^+ decays into three pseudoscalars
In response to recent experimental findings from the BES III and LHCb collaborations concerning the decay of open charm mesons into three pseudoscalars, we present evidence suggesting that the lightest scalar mesons can be characterized as diquark-antidiquark states mixed with the next-to-light, q\bar q, scalar mesons through six-fermion, instanton-induced interactions.

Hadrons in group expansion
Hua-Xing Chen
https://arxiv.org/abs/2506.01272 https://arxiv.org/pdf/2506.01272

Hadrons in group expansion
Various approximate symmetries exist in nature. For example, the flavor $SU(4)$ symmetry involving the $up/down/strange/charm$ quarks is severely broken, the flavor $SU(3)$ symmetry involving the $up/down/strange$ quarks is moderately broken, and the isospin $SU(2)$ symmetry involving the $up/down$ quarks is slightly broken. These broken symmetries are primarily governed by the strong interaction, making them an ideal platform for investigating the general behavior of approximate symmetries. To…

This https://arxiv.org/abs/2505.03264 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_hepp…

Study of Heavy Hadron Production in Au + Au Collisions at a Center-of-Mass Energy of $\sqrt{s_{NN}}=200$ GeV
Using the Monte Carlo HYDJET++ model, the transverse momentum ($p_{T}$) spectra of heavy hadrons ($D^{0}$, $\overline{D}^{0}$, $D^{+}$, $D^{-}$ and $Λ_{c}$), as well as the nuclear modification factors of $D^{0}$ and $D^{\pm}$, produced in Au + Au collisions at $\sqrt{s_{NN}} = 200$ GeV RHIC energy across various centrality bins, are presented. This study is motivated by the need to understand the centrality dependence of the charm enhancement factor ($γ_{c}$) and the roles of different hadro…

Analysis of the hadronic molecules $DK$, $D^*K$, $DK^*$ and their bottom analogs with QCD sum rules
Ze Zhou, Guo-Liang Yu, Zhi-Gang Wang, Jie Lu
https://arxiv.org/abs/2508.00402

Analysis of the hadronic molecules $DK$, $D^*K$, $DK^*$ and their bottom analogs with QCD sum rules
In this work, we construct the color-singlet-color-singlet type currents to study the masses and pole residues of charm-strange tetraquark states and their bottom analogs with $J^P$ = $0^+$ and $1^+$ by using two-point QCD sum rules, where the vacuum condensates are considered up to dimension 12. The predicted masses for $DK$, $D^*K$ and $DK^*$ molecular states are $2.322_{ - 0.072}^{ + 0.066}$ GeV, $2.457_{ - 0.068}^{ + 0.064}$ GeV and $2.538_{ - 0.062}^{ + 0.059}$ GeV. These results are consi…

This https://arxiv.org/abs/2411.17098 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_hepp…

Determination of the binding and $DK$ probability of the $D^{*}_{s0}(2317)$ from the $(\bar{D}\bar K)^-$ mass distributions in $Λ_{b}\to Λ_{c} (\bar{D}\bar K)^-$ decays
We study the $Λ_{b}\toΛ_{c}\bar{D}^{0}K^{-}$ and $Λ_{b}\to Λ_{c}D^{-}\bar{K}^{0}$ decays which proceed via a Cabibbo and $N_c$ favored process of external emission, and we determine the $\bar{D}^{0}K^{-}$ and $D^{-}\bar{K}^{0}$ mass distributions close to the $\bar{D} \bar{K}$ threshold. For this, we use the tree level contribution plus the rescattering of the meson-meson components, using the extension of the local hidden gauge approach to the charm sector that produces the $D^*_{s0}(2317)…

Unwinding the rare $\Omega$ sector: Fragmentation of fully charmed baryons from HL-LHC to FCC
Francesco Giovanni Celiberto
https://arxiv.org/abs/2506.00776

Unwinding the rare $Ω$ sector: Fragmentation of fully charmed baryons from HL-LHC to FCC
By adopting a hadron-structure-oriented approach, we present and discuss the release of the novel OMG3Q1.0 set of collinear fragmentation functions for fully charmed, rare $Ω$ baryons. Our methodology combines diquark-like proxy model inputs for both charm-quark and gluon channels, calculated at the initial energy scales, with a DGLAP evolution that ensures a consistent treatment of heavy-quark thresholds, following directly from the HF-NRevo scheme. We complement our work with a phenomenologi…

Initial condition for the Balitsky-Kovchegov equation at next-to-leading order
Carlisle Casuga, Henri H\"anninen, Heikki M\"antysaari
https://arxiv.org/abs/2506.00487

Initial condition for the Balitsky-Kovchegov equation at next-to-leading order
We determine the initial condition of the Balitsky-Kovchegov evolution equation at next-to-leading order (NLO) accuracy using HERA deep inelastic scattering data. Posterior distributions characterizing the initial condition are extracted using Bayesian inference. The total cross section and charm quark production data from HERA are found to provide stringent constraints on the posterior. These distributions quantify the uncertainty in the initial condition and serve as necessary input for propa…