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SUMMARY:Two-Pion and Two-Kaon Femtoscopic Correlations in Au+Au Collisions
  at √s_NN =14.6 and 19.6 GeV from EPOS4
DTSTART;VALUE=DATE-TIME:20261028T132000Z
DTEND;VALUE=DATE-TIME:20261028T133500Z
DTSTAMP;VALUE=DATE-TIME:20261021T015602Z
UID:indico-contribution-6296@cern.ch
DESCRIPTION:Speakers: Egor Alpatov (NRNU MEPhI)\, Alexey Povarov (NRNU MEP
 hI)\nFemtoscopic correlations of identical particles provide a powerful to
 ol for probing the space-time structure and dynamical evolution of the par
 ticle-emitting source created in relativistic heavy-ion collisions. Measur
 ements of femtoscopic radii constrain the characteristic homogeneity lengt
 hs of the expanding system and their dependence on collision geometry and 
 particle momentum\, thereby providing sensitivity to collective expansion 
 and freeze-out dynamics. The intermediate collision-energy region is parti
 cularly important\, as it bridges the high-energy\, low-baryon-density reg
 ime and the baryon-rich matter produced at lower energies\, offering an op
 portunity to study how the space-time evolution of the system changes with
  collision energy. Comparing different particle species\, in particular pi
 ons and kaons\, provides additional constraints because of their different
  masses\, production mechanisms\, and contributions from resonance decays.
 \n\nWe present a systematic femtoscopic study of identical charged pion an
 d kaon pairs in Au+Au collisions at $\\sqrt{s_{\\mathrm{NN}}}=14.6$ and $1
 9.6$ GeV simulated with the EPOS4 model. Three-dimensional two-particle co
 rrelation functions are constructed in the Bertsch–Pratt decomposition o
 f the relative momentum into the out\, side\, and long components. The fem
 toscopic parameters are extracted as functions of collision centrality and
  pair transverse momentum\, $k_{\\mathrm{T}}$\, for both pion and kaon pai
 rs. The centrality and $k_{\\mathrm{T}}$ dependences of the extracted $R_{
 \\mathrm{out}}$\, $R_{\\mathrm{side}}$\, and $R_{\\mathrm{long}}$ radii ar
 e compared between pions and kaons and between the two collision energies.
  These results characterize the space-time structure and momentum dependen
 ce of particle emission predicted by EPOS4 in the intermediate-energy regi
 me and provide a baseline for comparisons with experimental femtoscopic me
 asurements.\n\nhttps://indico.particle.mephi.ru/event/626/contributions/62
 96/
LOCATION:Sevastopol Hotel
URL:https://indico.particle.mephi.ru/event/626/contributions/6296/
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