Thu·Jun 12, 2025Thursday·June 12, 2025

1. 01*

   ALICE highlights

   Xiaozhi Bai🇨🇳

   The recent ALICE results on hard probes, focusing on open heavy flavor, quarkonia, and jet measurements in pp and Pb--Pb collisions are presented. During the LHC Run 3, the continuous readout of the upgraded Time Projection Chamber (TPC) with GEM technology, along with improved tracking from ITS2 and the newly installed Muon Forward Tracker (MFT), have enabled high-precision studies of quarkonia and heavy flavour production, and jet modification in the quark-gluon plasma (QGP). These new measurements provide crucial constraints on parton energy loss mechanisms and heavy-quark dynamics in hot QCD matter. Future upgrades planned for Run 4, as well as the long-term ALICE 3 with an all-silicon tracking system, will further enhance the ability to study the properties of QGP with unprecedented accuracy.

   nucl-exhep-exEPJ Web Conf.(2025)·0 citations
2. 02*

   Spin alignment of Quarkonia: A Possible Probe of Deconfined QCD matter in Pb+Pb Collisions at $\sqrt{s_{\mathrm{NN}}}=5.02$ TeV

   Bhagyarathi Sahoo🇮🇳 · Captain R. Singh🇮🇳 · Raghunath Sahoo🇮🇳

   In this study, we investigate the influence of deconfined QCD matter on quarkonium spin alignment in ultra-relativistic heavy-ion collisions. We estimate the spin alignment of charmonium ($J/\psi$, and $\psi$(2S)) and bottomonium (${\rm Y}$(1S), and ${\rm Y}$(2S)) states for Pb+Pb collisions at $\sqrt{s_{\mathrm{NN}}}=5.02$ TeV as a function of transverse momentum by calculating the energy eigenvalues in a thermal rotating medium. We solve the Schrödinger equation with a medium-modified color-singlet potential, considering the coupling of spin with vorticity and magnetic field. Furthermore, we evaluate the effect of medium temperature, vorticity, magnetic field, and momentum-space anisotropy on the elements of the spin density matrix. Our findings reveal that vorticity increases the spin alignment, while the magnetic fields and anisotropy modify the observables in a state-dependent manner. These findings deepen our understanding of quarkonium spin alignment in an anisotropic magneto-vortical thermal medium, shedding light on spin transport phenomena in heavy-ion collisions.

   ↳ hep-phhep-exhep-thnucl-ex+1EPJC(2026)·8 citations
3. 03*

   Heavy Quark State Production via p-p and O-O Collisions

   Leonard S. Kisslinger🇺🇸 · Debasish Das🇮🇳

   Here we have considered $J/\Psi$ is a normal charmonium meson, while $\Psi (2S)$ is a mixed hybrid charmonium meson. Similarly ${\rm Y}(1S)$ and${\rm Y}(2S)$ are normal upsilon mesons, while ${\rm Y}(3S)$ is a mixed hybrid upsilon meson. We discuss the differential rapidity cross sections for $J/\Psi$, $\Psi (2S)$, ${\rm Y}(1S)$, ${\rm Y}(2S)$, ${\rm Y}(3S)$ production via p-p, and O-O collisions at proton-proton energy $\equiv \sqrt{s_{pp}}$= 5.44 TeV. The rapidity taken for the present study goes from y=-1 to 1.

   ↳ hep-phhep-exnucl-exnucl-th0 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.