Wed·Sep 3, 2025Wednesday·September 3, 2025

1. 01*

   Investigating charm-quark dynamics in the QGP via the charm-hadron elliptic flow in $\mathrm{Pb}-\mathrm{Pb}$ collisions with ALICE

   Chuntai Wu (for the ALICE Collaboration)🇮🇹

   In these proceedings, we report the measurement of the elliptic flow ($v_2$) of prompt and non-prompt ${\mathrm{D}}^0$, prompt ${\mathrm{D}}^{+}$ and ${\mathrm{D}}_{\mathrm{s}}^{+}$ mesons, and, for the first time ever at the LHC, prompt and non-prompt ${\Lambda }_{\mathrm{c}}^{+}$ baryons in \PbPb collisions at $\sqrt{s_{\mathrm{NN}}}=5.36\mathrm{TeV}$ collected by the ALICE experiment during the LHC Run 3. The analysis is performed at midrapidity ($|y|<0.8$) in different centrality classes ($30-40\%$, $40-50\%$, and $60-80\%$ for ${\mathrm{D}}^0$, ${\mathrm{D}}^{+}$, and ${\mathrm{D}}_{\mathrm{s}}^{+}$; $30-50\%$ for ${\Lambda }_{\mathrm{c}}^{+}$). The candidates are reconstructed from hadronic decay channels, and the $v_2$ is extracted via the scalar-product method. The measurements are compared to light-flavor results and several predictions of models that differently describe heavy-quark transport and hadronization processes in the QGP.

   nucl-exhep-exEPJ Web Conf.(2026)·1 citation
2. 02*

   Doppler shifted Hawking radiation from acoustic black holes in ultra-relativistic heavy-ion collisions

   Sanatan Digal🇮🇳 · Ajit M. Srivastava🇮🇳

   In a hydrodynamic flow, with flow becoming supersonic at some point, the subsonic-supersonic boundary behaves as the horizon of a black hole. Possibility of detecting Hawking radiation from such acoustic black holes has been investigated in a variety of laboratory systems, ranging from cold atom systems, to condensed matter systems with hydrodynamic flow of electrons, to relativistic heavy-ion collisions (at relatively lower collision energies). Ultra-relativistic heavy-ion collisions, with boost-invariant longitudinal flow of the quark-gluon plasma (QGP) in a wide rapidity window has eluded this remarkable possibility because in this case the black hole horizon is dynamical, moving away from center with sound velocity, leading to infinite red shift of Hawking radiation. We show here that such a conclusion is premature. The QGP flow at very large rapidities, necessarily deviates from Bjroken boost invariant flow. Due to this, an observer close to that region sees black hole horizon with a finite redshift. It leads to non-trivial prediction of Hawking radiation affecting particle momentum distributions for a window of rapidities, leaving near central rapidity regions unaffected.

   ↳ hep-phgr-qchep-thnucl-ex+10 citations
3. 03*

   Theory Summary

   Hannah Elfner🇩🇪

   This is the write-up of the summary talk on theory activities in the heavy-ion community as presented at Quark Matter 2025. It contains a (biased) selection of results from the parallel program of the conference. The progress is reported for three different areas: Bulk dynamics and initial state; jets, heavy flavor and electromagnetic probes and QCD phase diagram and observables. The idea is to convey the major achievements in the field and give a perspective for future directions.

   ↳ nucl-thnucl-exEPJ Web Conf.(2026)·0 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.