Wed·Sep 10, 2025Wednesday·September 10, 2025

1. 01*

   Proceedngs of Charmonium production in heavy-ion collisions, Quark Matter 2025

   Ingrid McKibben Lofnes (for the ALICE Collaboration)🇳🇴

   The early production of heavy quarks ($c\bar{c}$ and $b\bar{b}$) makes charmonia an ideal probe to study the evolution of the hot and dense medium produced in ultra-relativistic heavy-ion collisions, known as the quark--gluon plasma (QGP). At LHC energies, the well established suppression of charmonium yield from color screening in the QGP is counterbalanced by the recombination of uncorrelated charm-quark pairs, either throughout the QGP phase or solely at the phase boundary. Systematic measurements of charmonium ground and excited states are important to discriminate between the scenarios forseen by various theoretical models. In addition, studies of non-prompt charmonia, i.e., charmonia originating from the decay of beauty hadrons, give access to study the energy loss of beauty quarks in the QGP. In these proceedings we present recently published Run 2 results by the ALICE Collaboration of prompt and non-prompt J/$\psi$ measured at midrapidity in Pb--Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 5.02 TeV. In addition, the first preliminary Run 3 measurement of the $\psi$(2S)-to-J/$\psi$ ratio, measured at forward rapidity in Pb--Pb collisions at $\sqrt{s_{\mathrm{NN}}}$= 5.36 TeV, is shown. The results are compared to available theoretical model calculations.

   nucl-exhep-ex0 citations
2. 02*

   Excitation Spectra of the ${}^{12}\mathrm{C}(p,d)$ Reaction near the ${\eta }^{\prime }$-Meson Emission Threshold Measured in Coincidence with High-Momentum Protons

   R. Sekiya🇯🇵 · K. Itahashi🇯🇵 · Y. K. Tanaka🇯🇵 · S. Hirenzaki🇯🇵 · N. Ikeno🇯🇵 · V. Metag🇩🇪 · M. Nanova🇩🇪 · J. Yamagata-Sekihara🇯🇵 · V. Drozd🇳🇱 · H. Ekawa🇯🇵 · H. Geissel🇩🇪 · E. Haettner🇩🇪 and 65 other authors

   The missing mass of the ${}^{12}\mathrm{C}(p,d)$ reaction has been measured near the ${\eta }^{\prime }$-meson emission threshold in coincidence with a high-momentum proton to selectively collect ${\eta }^{\prime }$-${}^{11}\mathrm{C}$ mesic nucleus formation events at GSI, Germany. A 2.5 GeV proton excites a carbon nucleus to form an ${\eta }^{\prime }$-mesic nucleus emitting a deuteron forward with an energy of $\sim 1.6$ GeV. The deuteron is momentum-analyzed by the Fragment Separator used as a high-resolution spectrometer to deduce the excitation energy of the residual system. The large-acceptance detector WASA surrounding the target identifies high-momentum protons emitted in the decay of the ${\eta }^{\prime }$-mesic nucleus. The measured semi-exclusive spectrum exhibits structures below the threshold though the statistical significance is limited. The spectrum is fitted by theoretically calculated spectra varying optical-potential parameters of the ${\eta }^{\prime }$-nucleus interaction. The analysis results indicate ${\eta }^{\prime }$-mesic nuclei formation for the real potential depth of $\sim -61$ MeV with a local statistical significance of $3.5\sigma$ and, taking into account the look-elsewhere effect, a global significance of $2.1\sigma$.

   nucl-exnucl-thPRL(2026)·11 citations
3. 03*

   Readout noise of digital frequency multiplexed TES detectors for CUPID

   Michel Adamič🇨🇦 · Joseph Camilleri🇺🇸 · Chiara Capelli🇨🇭 · Matt Dobbs🇨🇦 · Tucker Elleflot🇺🇸 · Yury G. Kolomensky🇺🇸 · Daniel Mayer🇺🇸 · Joshua Montgomery🇨🇦 · Valentine Novosad🇺🇸 · Vivek Singh🇺🇸 · Graeme Smecher🇨🇦 · Aritoki Suzuki🇺🇸 · Bradford Welliver🇺🇸

   Superconducting transition-edge sensor (TES) detectors have been the standard in Cosmic Microwave Background experiments for almost two decades and are now being adapted for use in nuclear physics, such as neutrinoless double beta decay searches. In this paper we focus on a new high-bandwidth frequency multiplexed TES readout system developed for CUPID, a neutrinoless double beta decay experiment that will replace CUORE. In order to achieve the high energy resolution requirements for CUPID, the readout noise of the system must be kept to a minimum. Low TES operating resistance and long wiring between the readout SQUID and the warm electronics are needed for CUPID, prompting a careful consideration of the design parameters of this application of frequency multiplexing. In this work, we characterize the readout noise of the newly designed frequency multiplexed TES readout system for CUPID and construct a noise model to understand it. We find that current sharing between the SQUID coil impedance and other branches of the circuit, as well as the long output wiring, worsen the readout noise of the system. To meet noise requirements, a SQUID with a low input inductance, high transimpedance and/or low dynamic impedance is needed, and the wiring capacitance should be kept as small as possible. Alternatively, the option of adding a cryogenic low-noise amplifier at the output of the SQUID should be explored.

   ↳ physics.ins-detastro-ph.IMnucl-exIEEE Trans.Nucl.Sci.(2026)·0 citations
4. 04*

   GUMP1.0 -- First global extraction of generalized parton distributions from experiment and lattice data with NLO accuracy

   Yuxun Guo🇺🇸 · Fatma P. Aslan🇺🇸 · Xiangdong Ji🇺🇸 · M. Gabriel Santiago🇺🇸

   We report the first global extraction of generalized parton distributions (GPDs), GUMP1.0, by combining deeply virtual Compton scattering and $\rho$-meson production data from Jefferson Lab and Hadron-Electron Ring Accelerator with global fits of parton distribution functions, charge form factors, and lattice quantum chromodynamics simulations. Using a conformal moment space parametrization, we achieve a unified description across low- and high-$x$ regions at next to leading order (NLO) accuracy in perturbative corrections. The results provide state-of-the-art GPDs consistent with almost all known facts, enabling three-dimensional nucleon imaging in impact parameter space and, at the same time, establishing a benchmark for future theoretical and experimental studies of the nucleon structure.

   ↳ hep-phhep-latnucl-exnucl-thPRL(2025)·37 citations
5. 05*

   Imaging the Jet-Induced Medium Response with Energy Correlators

   Hannah Bossi🇺🇸 · Arjun Kudinoor🇺🇸 · Ian Moult🇺🇸 · Daniel Pablos🇪🇸 · Ananya Rai🇺🇸 · Krishna Rajagopal🇺🇸

   Quark-gluon plasma (QGP), when viewed at length scales of order the inverse of its temperature, behaves as a strongly-coupled liquid. However, when it is probed with sufficiently high momentum transfer, asymptotic freedom mandates the presence of quark- and gluon-like quasi-particles. High energy partons within jets can trigger these high-momentum exchanges, making jets valuable probes for revealing the presence of such quasi-particles. Such elastic scatterings are implemented in the Hybrid Model, where a jet parton that scatters is deflected, kicking a medium parton, which recoils. Before and after a scattering, as one and then both partons propagate through the medium, they lose energy and momentum, exciting wakes in the QGP droplet. We use two-point and three-point energy-energy correlators (EECs) to reveal the relevant angular regions at which (modified) parton showers and wakes in the QGP each dominate, offering a new way with which to visualize and constrain the corresponding dynamics. We compare our calculations to recent CMS and ALICE measurements of two-point EECs of charged-particle tracks in jets produced in PbPb collisions. We show that our calculations are closest to the experimental measurements when elastic scattering is included and when the elastically scattered recoil-partons produce their own wakes. We also propose a new variant of the measurement that is especially sensitive to jet wakes.

   ↳ hep-phnucl-exnucl-thEPJ Web Conf.(2026)·3 citations

* Reconstructed cohort: no mailing for this day survives in the archive. Papers are grouped by their submission times and arXiv's announcement cut-off, assuming announcement without delay; positions follow identifier order. Validated at ~91% exact-day agreement against the archived era.