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SUMMARY:Thermal photon production in Au+Au collisions observed by PHENIX
DTSTART;VALUE=DATE-TIME:20201006T140500Z
DTEND;VALUE=DATE-TIME:20201006T142000Z
DTSTAMP;VALUE=DATE-TIME:20260515T140001Z
UID:indico-contribution-2347@cern.ch
DESCRIPTION:Speakers: Iurii Mitrankov ()\nDirect photons provide valuable 
 insight into the collective properties of Quark-Gluon Plasma. They are emi
 tted throughout the evolution of a heavy ion collision and do not interact
  strongly with the medium as they leave it. The PHENIX experiment has dete
 cted both a large yield and a large elliptic flow of low-$p_T$ direct phot
 ons in Au+Au collisions at $\\sqrt{s_{_{NN}}}=$ 200 GeV. Calculation of th
 ermal photon emission fall short in describing the yield and the anisotrop
 y at the same time. An intriguing scaling behavior is observed between the
  low-$p_T$ direct photon production and the charge particle multiplicity a
 cross all $p$ ($d$)+A and A+A collision systems and different beam energie
 s from 39 GeV to 2760 GeV\, indicating similar photon sources for all thes
 e systems. To provide more insight into photon production mechanism and mo
 re constraints on theoretical models\, precise measurement of the direct p
 hoton anisotropy is needed. In this talk\, measurements of spectra and the
  flow coefficients of low-momentum will be presented with the high statist
 ics of Au+Au data taken in the year 2014. New results provide a 10 fold in
 crease in statistics for the measurement of direct photon yields and their
  anisotropy.\n\nhttps://indico.particle.mephi.ru/event/35/contributions/23
 47/
LOCATION:Zoom Heavy Ion
URL:https://indico.particle.mephi.ru/event/35/contributions/2347/
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