Thu·Jan 12, 2023Thursday·January 12, 2023

1. 01*

   Elliptic flow measurement of $J/\psi$ in PHENIX Run14 Au+Au at $\sqrt{s_{NN}}=200$ GeV

   Luis Bichon III (for the PHENIX Collaboration)🇺🇸

   We obtain the first measurement of $J/\psi$ elliptic flow at RHIC energies in forward rapidity using data from the PHENIX detector and applying an event plane method. The dataset used contains 19 billion events from the PHENIX experiment's Run 14 Au + Au dataset at $\sqrt{s_{NN}}=200$ GeV. PHENIX has measured a $J/\psi$ $v_2$ in a centrality range of $10-60\%$ that is consistent with zero. Taken together with results from LHC the measurement of $v_2$, which is consistent with zero may indicate that $J/\psi$ production by coalescence is not significant at forward rapidity at RHIC energy.

   nucl-ex1 citation
2. 02*

   Pre-Equilibrium Evolution of Conserved Charges with ICCING Initial Conditions

   Patrick Carzon🇺🇸 · Mauricio Martinez🇺🇸 · Jacquelyn Noronha-Hostler🇺🇸 · Philip Plaschke🇩🇪 · Soeren Schlichting🇩🇪 · Matthew Sievert🇺🇸

   Heavy-ion collisions can be well described through relativistic viscous hydrodynamics, but questions still remain when hydrodynamics is applicable because the initial state may begin very far-from-equilibrium. Thus, a pre-equilibrium evolution phase is used to bridge the gap between the initial state and hydrodynamics. K$\varphi$MP$\varphi$ST is one such pre-equilibrium model that propagates the energy-momentum tensor by decomposing it into the background and fluctuations around that background, whose evolution is captured by Green's functions. We extend this formalism to include conserved charges and calculate the corresponding non-equilibrium Green's functions in the relaxation time approximation. The ICCING algorithm initializes conserved charges in the initial state by sampling $g\to q\bar{q}$ splitting probabilities and is, thus, perfectly positioned to implement Green's functions for charge propagation. We show that this method alters the initial state charge geometries and is applicable in central to mid-central collisions.

   ↳ nucl-thhep-phnucl-exPRC(2023)·18 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.