Tootfinder

New probes of nuclear gluon dynamics through photoproduction of charm in inelastic ultra-peripheral Pb$\unicode{x2014}$Pb collisions with ALICE
Sigurd Nese (for the ALICE Collaboration)
https://arxiv.org/abs/2509.11814

New probes of nuclear gluon dynamics through photoproduction of charm in inelastic ultra-peripheral Pb$\unicode{x2014}$Pb collisions with ALICE
In an ultra-peripheral collision, a photon can interact with a gluon in the target nucleus and produce a pair of charm quarks, while the target nucleus breaks up (inelastic scattering). These charm quarks then fragment and are observed as open charm hadrons or vector mesons. This process has been used in e$\unicode{x2014}$p collisions to set stringent limits on the proton gluon distribution at low-$x$. The current measurements can provide similar constraints on the much less known nuclear gluon…

🇺🇦 #NowPlaying on KEXP's #MechanicalBreakdown
Carrellee:
🎵 Not Here For Fun
#Carrellee
https://carrellee.bandcamp.com/track/not-here-for-fun
https://open.spotify.com/track/7pHtfRVprwCQ0zO93XBGXL

If you are using nextcloud as your main file and photo backup (for personal files, not work!), what are you using for organising your photos?
Photoprism? Memories? Something else?
photoprism
NextCloud photos
something else (add in comments)
NextCloud memories

🇺🇦 #NowPlaying on BBCRadio3's #LateJunction
Laurie Spiegel:
🎵 Pentachrome
#LaurieSpiegel
https://open.spotify.com/track/4PD6tbRB8w1F4Jnc08CTzw

Exclusive photoproduction of light and heavy vector mesons: thresholds to very high energies
Lin Tang, Hui-Yu Xing, Minghui Ding, Craig D. Roberts
https://arxiv.org/abs/2510.08845

Exclusive photoproduction of light and heavy vector mesons: thresholds to very high energies
A reaction model for $γ+ p \to V + p$, $V=ρ^0, ϕ, J/ψ, Υ$, which exposes the quark-antiquark content of the photon in making the transition $γ\to {q} \bar{q} + \mathbb P \to V$, where ${q}$ depends on $V$, and couples the intermediate ${q} \bar{q}$ system to the proton's valence quarks via Pomeron ($\mathbb P$) exchange, is used to deliver a unified description of available data -- both differential and total cross sections -- from near threshold to very high energies, $W$, for all the $V…

Measurement of Beam-Recoil Observables $C_x$ and $C_z$ for $K^ \Lambda$ Photoproduction
CLAS Collaboration, S. Adhikari, B. A. Raue, D. S. Carman, L. Guo, T. Chetry, P. Achenbach, J. S. Alvarado, M. J. Amaryan, W. R. Armstrong, H. Atac, H. Avakian, L. Baashen, N. A. Baltzell, L. Barion, M. Bashkanov, M. Battaglieri, F. Benmokhtar, A. Bianconi, A. S. Biselli, S. Boiarinov, M. Bondi, F. Bossu, K. -Th. Brinkmann, W. J. Briscoe, W. K. Brooks, S. Bueltmann, V. D. Burkert, T. Cao, R. Capobia…

Measurement of Beam-Recoil Observables $C_x$ and $C_z$ for $K^+Λ$ Photoproduction
Exclusive photoproduction of $K^+ Λ$ final states off a proton target has been an important component in the search for missing nucleon resonances and our understanding of the production of final states containing strange quarks. Polarization observables have been instrumental in this effort. The current work is an extension of previously published CLAS results on the beam-recoil transferred polarization observables $C_x$ and $C_z$. We extend the kinematic range up to invariant mass $W=3.33$~G…

Q&A with OpenAI COO Brad Lightcap on GPT-5, its dynamic reasoning, defining AGI, scaling vs. post-training, hallucinations, enterprise adoption, and more (Alex Kantrowitz/Big Technology)
https://www.

OpenAI COO Brad Lightcap: GPT-5's Capabilities, Why It Matters, and Where AI Goes Next
A conversation about what OpenAI's long-anticipated flagship model tells us about different forms intelligence and AI's trajectory from here.

Reinforcement learning meets bioprocess control through behaviour cloning: Real-world deployment in an industrial photobioreactor
Juan D. Gil, Ehecatl Antonio Del Rio Chanona, Jos\'e L. Guzm\'an, Manuel Berenguel
https://arxiv.org/abs/2509.06853

Reinforcement learning meets bioprocess control through behaviour cloning: Real-world deployment in an industrial photobioreactor
The inherent complexity of living cells as production units creates major challenges for maintaining stable and optimal bioprocess conditions, especially in open Photobioreactors (PBRs) exposed to fluctuating environments. To address this, we propose a Reinforcement Learning (RL) control approach, combined with Behavior Cloning (BC), for pH regulation in open PBR systems. This represents, to the best of our knowledge, the first application of an RL-based control strategy to such a nonlinear and…

Investigating subnucleonic structures via new measurements of incoherent J/$\psi$ photoproduction in ultra-peripheral Pb--Pb collisions with ALICE
Vendulka Humlov\'a (on behalf of the ALICE Collaboration)
https://arxiv.org/abs/2510.11120

Investigating subnucleonic structures via new measurements of incoherent J/$ψ$ photoproduction in ultra-peripheral Pb--Pb collisions with ALICE
Ultra-peripheral collisions of heavy ions provide a unique environment to study the gluon structure of nuclei through photon-induced reactions. In particular, the incoherent photoproduction of J/$ψ$ vector meson is sensitive to event-by-event fluctuations of the gluon field at nucleon and subnucleonic scales. We report new ALICE measurement of incoherent J/$ψ$ production in Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}=5.02$ TeV, differential in both photon-nucleus energy and Mandelstam-$|…