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SUMMARY:Elliptic flow of $\\pi^{0}$ in $^3$He+Au and U+U collisions
DTSTART;VALUE=DATE-TIME:20241025T063000Z
DTEND;VALUE=DATE-TIME:20241025T064500Z
DTSTAMP;VALUE=DATE-TIME:20260517T030012Z
UID:indico-contribution-4345@cern.ch
DESCRIPTION:Speakers: Egor Bannikov (Peter the Great St.Petersburg Polytec
 hnic University (SPbPU))\nHadronic matter in heavy-ion collisions can reac
 h extreme energy densities and undergo a phase transition into quark-gluon
  plasma (QGP) consisting of asymptotically free partons. One of the main w
 ays to investigate QGP’s properties is to measure the azimuthal particle
  anisotropy in momentum space. This anisotropy can be characterized by the
  elliptic flow ($v_2$).\n\nThe elliptic flow for charged hadrons was measu
 red by PHENIX experiment at RHIC in small collision systems (p/d$/^3$He+Au
 ). In the most central collisions\, azimuthal anisotropy can be described 
 by relativistic hydrodynamics\, as in heavy-ion collisions. However\, $v_2
 $ of charged hadrons in more peripheral collisions cannot be interpreted o
 nly as flow\, but has significant nonflow contribution\, which also depend
 s on transverse momentum ($p_T$). Since the production of $\\pi^0$ mesons 
 can be measured up to high values of $p_T$\, the measurement of the $v_2$ 
 values for $\\pi^0$ in $^3$He+Au collisions is considered unique tool to s
 tudy the interplay between flow and nonflow effects in small systems.\n\nT
 he second part of this report is devoted to the measurement of $v_2$ value
 s for $\\pi^0$ mesons in U+U collision system – the largest system at RH
 IC. Since the $^{238}$U nucleus is highly deformed\, the study of collisio
 ns of uranium nuclei is especially interesting from the point of view of s
 tudying jet-quenching effect. In heavy-ion collisions nonzero values of $v
 _2$ at high $p_T$ can be associated with partonic energy loss. This makes 
 the elliptic flow of $\\pi^0$ meson\, which is measurable up to high $p_T$
 \, effective tool to study jet-quenching effect in U+U collisions.\n\nThus
 \, the current report is dedicated to the measurement of $\\pi^0$ mesons e
 lliptic flow in $^3$He+Au and U+U collisions at $\\sqrt{s_{NN}}$=200 GeV a
 nd $\\sqrt{s_{NN}}$=193 GeV\, respectively\, as a function of transverse m
 omentum and centrality.\n\nThe report can be considered as a prototype of 
 the research planned in the MPD experiment of the megaproject NICA. \n\nWe
  acknowledge support from Russian Ministry of Education and Science. State
  assignment for fundamental research (code FSEG-2024-0033).\n\nhttps://ind
 ico.particle.mephi.ru/event/436/contributions/4345/
LOCATION: Petrovskiy 1
URL:https://indico.particle.mephi.ru/event/436/contributions/4345/
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