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"I first heard of Positano from Alberto Moravia. It was very hot in Rome. He said, “Why don’t you go down to Positano on the Amalfi Coast? It is one of the fine places of Italy”. Later John McKnight of United States Information Service told me the same thing. He had spent a year there working on a book. Half a dozen people echoed this. Positano kind of moved in on us and we found ourselves driving down to Naples on our way."…

A Precise Metallicity and Carbon-to-Oxygen Ratio for a Warm Giant Exoplanet from its Panchromatic JWST Emission Spectrum
Lindsey S. Wiser, Taylor J. Bell, Michael R. Line, Everett Schlawin, Thomas G. Beatty, Luis Welbanks, Thomas P. Greene, Vivien Parmentier, Matthew M. Murphy, Jonathan J. Fortney, Kenny Arnold, Nishil Mehta, Kazumasa Ohno, Sagnick Mukherjee

A Precise Metallicity and Carbon-to-Oxygen Ratio for a Warm Giant Exoplanet from its Panchromatic JWST Emission Spectrum
WASP-80 b, a warm sub-Jovian (equilibrium temperature ~820 K, 0.5 Jupiter masses), presents an opportunity to characterize a rare gas giant exoplanet around a low-mass star. In addition, its moderate temperature enables its atmosphere to host a range of carbon and oxygen species (H$_2$O, CH$_4$, CO, CO$_2$, NH$_3$). In this paper, we present a panchromatic emission spectrum of WASP-80 b, the first gas giant around a late K/early M-dwarf star and the coolest planet for which the James Webb Space…

Contact potentials in presence of a regular finite-range interaction using dimensional regularization and the $N/D$ method
David R. Entem, Juan Nieves, Jose Antonio Oller
https://arxiv.org/abs/2506.01461

Contact potentials in presence of a regular finite-range interaction using dimensional regularization and the $N/D$ method
We solve the Lippman-Schwinger equation (LSE) with a kernel that includes a regular finite-range potential and additional contact terms with derivatives. We employ distorted wave theory and dimensional regularization, as proposed in Physics Letters B 568 (2003) 109. We analyze the spin singlet nucleon-nucleon $S-$wave as case of study, with the regular one-pion exchange (OPE) potential in this partial wave and up to ${\cal O}(Q^6)$ (six derivatives) contact interactions. We discuss in detail th…

VO$_2$ oscillator circuits optimized for ultrafast, 100 MHz-range operation
Zsigmond Pollner, T\'imea N\'ora T\"or\"ok, L\'aszl\'o P\'osa, Mikl\'os Csontos, Sebastian Werner Schmid, Zolt\'an Balogh, Andr\'as B\"ukkfejes, Heungsoo Kim, Alberto Piqu\'e, Jeurg Leuthold, J\'anos Volk, Andr\'as Halbritter

VO$_2$ oscillator circuits optimized for ultrafast, 100 MHz-range operation
Oscillating neural networks are promising candidates for a new computational paradigm, where complex optimization problems are solved by physics itself through the synchronization of coupled oscillating circuits. Nanoscale VO$_2$ Mott memristors are particularly promising building blocks for such oscillating neural networks. Until now, however, not only the maximum frequency of VO$_2$ oscillating neural networks, but also the maximum frequency of individual VO$_2$ oscillators has been severely …

It's not just the English Channel / La Manche.
28 deaths a day as people try to reach Spanish Canary Islands by raft or open boat.
8 drowned in the harbour on arrival yesterday when theit boat capsized.
Again. Migration by boats will continue until a) source countries get just trade, reparations and an end to neocolonialism, and meanwhile,
b) #SafeRoutes
9.757 perso…

9.757 personas fallecieron en pateras o cayucos que trataban de llegar a Canarias en 2024: 28 muertes al día
Son los datos del balance anual que realiza la ONG Caminando Fronteras con su informe 'Monitoreo Derecho a la Vida' y que suponen un aumento del 62,4% frente a las cifras del año pasado

Iion-motion simulations of a plasma-wakefield experiment at FLASHForward
D. Kalvik, P. Drobniak, F. Pe\~na, C. A. Lindstr{\o}m, J. Beinortaite, L. Boulton, P. Caminal, J. Garland, G. Loisch, J. B. Svensson, M. Th\'evenet, S. Wesch, J. Wood, J. Osterhoff R. D'Arcy, S. Diederichs
https://arxiv.org/abs/2505.24299

Iion-motion simulations of a plasma-wakefield experiment at FLASHForward
In plasma-based acceleration, an ultra-relativistic particle bunch$\unicode{x2014}$or an intense laser beam$\unicode{x2014}$is used to expel electrons from its propagation path, forming a wake that is devoid of electrons. The ions, being significantly more massive, are often assumed to be stationary. However, both theory and simulations suggest that any sufficiently dense electron bunch can trigger ion motion, and its effect must be taken into account. We simulate beam-driven plasma wakefields …

Three fast-spinning medium-sized Hilda asteroids uncovered by TESS
N\'ora Tak\'acs, Csaba Kiss, R\'obert Szak\'ats, Emese Plachy, Csilla E. Kalup, Gyula M. Szab\'o, L\'aszl\'o Moln\'ar, Kriszti\'an S\'arneczky, R\'obert Szab\'o, Attila B\'odi, Andr\'as P\'al
https://arx…

Three fast-spinning medium-sized Hilda asteroids uncovered by TESS
Hilda asteroids, which orbit in a 3:2 resonance with Jupiter, serve as key indicators of dynamical processes in the early solar system. Their spin rates, an important probe of these mechanisms, can constrain their density and collisional evolution, offering valuable insights into their origin. In this paper, we report on the identification of three fast-rotating Hilda asteroids with spin periods in the 3.2--3.7 h range using data from the Transiting Exoplanet Survey Satellite. These rotation pe…

Two-gap superconductor ZrB12 with dynamic stripes and charge density waves: Crystal structure, physical properties and pairing mechanism
A. N. Azarevicha, N. B. Bolotinab, O. N. Khrykinab, A. V. Bogacha, K. M. Krasikova, A. Yu. Tsvetkovc, S. Yu. Gavrilkinc, V. V. Voronova, S. Gabanid, K. Flachbartd, A. N. Azarevich, N. B. Bolotina, O. N. Khrykina, A. V. Bogach, K. M. Krasikov, A. Yu. Tsvetkov, S. Yu. Gavrilkin, V. V. Voronov, S. Gabani, K. Flachbart, A. V. Kuznetsov, N. E. Sluchanko

Two-gap superconductor ZrB12 with dynamic stripes and charge density waves: Crystal structure, physical properties and pairing mechanism
A review of long-term studies of ZrB12 and LuB12 superconductors with very similar conduction bands and phonon spectra, but with radically different (by a factor of 15-20) critical temperatures and magnetic fields is presented. A detailed analysis of well-known studies in combination with new results of structural, thermodynamic and charge transport measurements obtained here for these metallic dodecaborides with Jahn-Teller instability of the rigid boron network and with dynamic charge stripes…

This https://arxiv.org/abs/2405.02926 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_nuc…

Charge-changing cross section and interaction cross sections for 4$\leq$Z$ \leq$9 isotopes
The root-mean-square proton and neutron radii for $^{7,9-12,14}$\rm Be, $^{10-15,17}$\rm B, $^{12-19}$\rm C, $^{14,15,17-22}$\rm N, $^{16,18-24}$\rm O, and $^{18-21,23-26}$\rm F isotopes are deduced from a systematic analysis of experimental charge-changing and interaction cross sections in the framework of Glauber model. The calculations involve descriptions of nuclei based on Slater determinants using harmonic oscillator single-particle wave functions. The extracted proton and neutron radii h…

Comparison of water models for structure prediction
B\'alint Socz\'o, Ildik\'o Pethes
https://arxiv.org/abs/2505.23446 https://

Comparison of water models for structure prediction
Describing the interactions of water molecules is one of the most common, yet critical, tasks in molecular dynamics simulations. Because of its unique properties, hundreds of attempts have been made to construct an ideal interaction potential model for water. In various studies, the models have been evaluated based on their ability to reproduce different properties of water. This work focuses on the atomic-scale structure in the liquid phase of water. Forty-four classical water potential models…

Updated baseline design for HALHF: the hybrid, asymmetric, linear Higgs factory
C. A. Lindstr{\o}m, E. Adli, J. B. B. Chen, P. Drobniak, E. E. H{\o}rlyk, D. Kalvik, K. N. Sjobak, T. Barklow, S. Gessner, M. Hogan, M. Berggren, A. Laudrain, B. List, J. List, V. Maslov, K. P\~oder, M. Th\'evenet, N. Walker, J. Wood, S. Boogert, P. N. Burrows, V. Cilento, R. D'Arcy, B. Foster, S. Farrington, X. Lu, G. Moortgat-Pick, A. Seryi

Updated baseline design for HALHF: the hybrid, asymmetric, linear Higgs factory
Particle physicists aim to construct a electron-positron Higgs factory as the next major particle collider. However, the high associated costs motivate the development of more affordable collider designs. Plasma-wakefield acceleration is a promising technology to this end. HALHF is a proposal for a Higgs factory that utilizes beam-driven plasma-wakefield acceleration to accelerate electrons to high energy with high gradient, while using radio-frequency acceleration to accelerate positrons to a …

Preliminary results from the CLEAR nonlinear plasma lens experiment
P. Drobniak, E. Adli, H. B. Anderson, K. N. Sjobak, C. A. Lindstr{\o}m, A. Dyson, S. M. Mewes, M. Th\'evenet
https://arxiv.org/abs/2505.21313

Preliminary results from the CLEAR nonlinear plasma lens experiment
Plasma lensing provides compact focusing of electron beams, since they offer strong focusing fields (kT/m) in both planes simultaneously. This becomes particularly important for highly diverging beams with a large energy spread such as those typically originating from plasma accelerators. The lens presented here is a nonlinear active plasma lens, with a controlled focusing-strength variation purposely introduced in one transverse direction. This lens is a key element of a larger transport latti…

ABEL: The Adaptable Beginning-to-End Linac simulation framework
J. B. B. Chen E. Adli, P. Drobniak, O. G. Finnerud, E. H{\o}rlyk, D. Kalvik, C. A. Lindstr{\o}m, F. Pe\~na, K. Sjobak
https://arxiv.org/abs/2505.22415

ABEL: The Adaptable Beginning-to-End Linac simulation framework
We introduce ABEL, the Adaptable Beginning-to-End Linac simulation framework developed for agile design studies of plasma-based accelerators and colliders. ABEL's modular architecture allows users to simulate particle acceleration across various beamline components. The framework supports specialised codes such as HiPACE++, Wake-T, ELEGANT, GUINEA-PIG, CLICopti and ImpactX, which facilitate precise modelling of complex machine components. Key features include simplified models for addressing tr…

The SPARTA project: toward a demonstrator facility for multistage plasma acceleration
C. A. Lindstr{\o}m, E. Adli, H. B. Anderson, P. Drobniak, D. Kalvik, F. Pe\~na, K. N. Sjobak
https://arxiv.org/abs/2505.14493

The SPARTA project: toward a demonstrator facility for multistage plasma acceleration
Plasma accelerators promise greatly reduced size and cost for future particle-accelerator facilities. However, several challenges remain to be solved; in particular that of coupling beams between plasma stages (i.e., staging) without beam-quality degradation, and that of ensuring a stable acceleration process. In order to mature the technology, it is also key to identify an application that requires staging and high stability but is not overly challenging in other parameters such as energy effi…