BEGIN:VCALENDAR VERSION:2.0 PRODID:-//CERN//INDICO//EN BEGIN:VEVENT SUMMARY:Imaging a nucleus with $J/\\psi$ photo-production in ultra-periphe ral collisions at STAR DTSTART;VALUE=DATE-TIME:20230210T094000Z DTEND;VALUE=DATE-TIME:20230210T095500Z DTSTAMP;VALUE=DATE-TIME:20260907T222003Z UID:indico-contribution-104-811@events.vecc.gov.in DESCRIPTION:Speakers: Ashik Ikbal Sheikh (Kent State University )\nIn ultr a-peripheral collisions (UPCs) where two relativistic nuclei pass one anot her at a distance more than twice the nuclear radius\, quasi-real photons from one nucleus may interact via a virtual quark-antiquark pair with gluo ns from the other nucleus and form short-lived vector mesons (e.g.\, $\\rh o^{0}$\, $J/\\psi$\, $\\phi$). Lorentz-boosted electromagnetic field of a relativistic nucleus can be quantized as linearly polarized photons. Due t o the photon polarization in the vector meson production processes\, a uni que diffractive or spin interference pattern can be observed. In order to study the interference pattern\, we will present the cos(2$\\Delta\\phi$) modulation\, where $\\Delta\\phi$ is the angle between the $J/\\psi$ and o ne of its daughters\, in Au+Au UPCs at $\\sqrt {s_{NN}} =$ 200 GeV recorde d in 2014 and 2016 by STAR. This angular modulation is sensitive to the nu clear geometry and gluon distribution inside the colliding nuclei.\n\nhttp s://events.vecc.gov.in/event/19/contributions/811/ LOCATION:Main Hall (Coral) URL:https://events.vecc.gov.in/event/19/contributions/811/ END:VEVENT BEGIN:VEVENT SUMMARY:Understanding QCD matter at finite density using relativistic nucl ear models DTSTART;VALUE=DATE-TIME:20230210T102500Z DTEND;VALUE=DATE-TIME:20230210T103700Z DTSTAMP;VALUE=DATE-TIME:20260907T222003Z UID:indico-contribution-104-788@events.vecc.gov.in DESCRIPTION:Speakers: Aman Abhishek (Institute of Mathematical Sciences)\n Lattice QCD has provided accurate information at zero baryon density. Latt ice QCD is also used at small baryon densities using Taylor expansion of p ressure. The agreement between QMHRG and Lattice QCD for pressure and seco nd order chiral susceptibility is good. However there are significant dif ferences between QMHRG and Lattice prediction of higher order susceptibili ties. Also at finite density the difference are significant. This suggests importance of non-resonant interactions in QCD thermodynamics. Also the m ost appropriate hadronic model that describes the confined phase of QCD sh ould be ubiquitous\, irrespective of the thermodynamic conditions.\n\n We have chosen hadronic models which are well constrained from the neutron star merger data and nuclear matter properties. We have calculated susceptibilities upto fourth order subject to constraints $n_Q/n_B=0.4\, n_S=0$ and $\\mu_Q=\\mu_S=0$. Comparision with Lattice Data at finite dens ity shows repulsive interactions due to omega meson play important role in bridging the gap between QMHRG and Lattice QCD. This is an alternative ap proach to VDW-HRG models where repulsion is introduced using phenomenologi cal parameters. \n \n Using energy density of QCD crosso ver transition at zero baryon density\, attempt has also been made to expl ore the phase diagram of QCD. Constraint is put on the location of QCD cr itical point for .8\n\nhttps://events.vecc.gov.in/event/19/contributions/7 88/ LOCATION:Main Hall (Coral) URL:https://events.vecc.gov.in/event/19/contributions/788/ END:VEVENT BEGIN:VEVENT SUMMARY:Production of light nuclei in Au+Au collisions at STAR DTSTART;VALUE=DATE-TIME:20230210T101000Z DTEND;VALUE=DATE-TIME:20230210T102500Z DTSTAMP;VALUE=DATE-TIME:20260907T222003Z UID:indico-contribution-104-800@events.vecc.gov.in DESCRIPTION:Speakers: Rishabh Sharma (Indian Institute of Science Educatio n and Research (IISER) Tirupati)\nThe Beam Energy Scan (BES) program at Re lativistic Heavy-Ion Collider (RHIC) aims to map the QCD phase diagram. Fi nite-temperature lattice QCD calculations suggest a smooth crossover trans ition from normal nuclear matter to the Quark-Gluon Plasma (QGP) phase at high temperature and vanishing baryon chemical potential. Several QCD-base d models suggest there is a first-order phase transition between hadronic matter and the QGP at low temperature and high baryon chemical potential\, and the first-order phase transition line should end at a critical point (CP) towards the crossover region. The BES program aims to experimentally locate the CP in the QCD phase diagram. It is suggested that light nuclei are formed by the coalescence of nucleons close to each other in phase spa ce. This makes them sensitive to the baryon density fluctuations that beco me larger in the vicinity of the CP. Therefore\, yields and ratios of ligh t nuclei could be an experimental probe to the first-order phase transitio n. \nIn this talk\, we will present the energy and centrality dependence o f transverse momentum spectra of light nuclei ($d$ and $t$) in Au+Au colli sions from the BES-I data. We will also report the energy and centrality d ependence of yields and ratios of light nuclei. STAR has also recorded hig h statistics data from Au+Au collisions at various energies in the BES-II program which comes with enhanced detector capability. The performance of light nuclei analysis in this dataset will be demonstrated.\n\nhttps://eve nts.vecc.gov.in/event/19/contributions/800/ LOCATION:Main Hall (Coral) URL:https://events.vecc.gov.in/event/19/contributions/800/ END:VEVENT BEGIN:VEVENT SUMMARY:Enhanced strange hadron productions in Cu+Cu collisions at $\\sqrt {s_{NN}}$=200GeV\, RHIC energy DTSTART;VALUE=DATE-TIME:20230210T095500Z DTEND;VALUE=DATE-TIME:20230210T101000Z DTSTAMP;VALUE=DATE-TIME:20260907T222003Z UID:indico-contribution-104-896@events.vecc.gov.in DESCRIPTION:Speakers: Apar Agarwal (Variable Energy Cyclotron Centre)\nSTA R collaboration has observed more strange hadrons in Cu+Cu collisions comp ared to Au+Au collisions at RHIC energy[1]\, $\\sqrt{s_{NN}}$=200 GeV. We calculate the yield of $K\, \\Lambda\, \\Xi\, \\Omega$ using momentum inte grated Boltzmann equation. Following a microscopic approach by considering possible hadronic interactions the strange hadron yields are calculated f or different centralities of Cu+Cu collisions at midrapidity. Then the rat ios of the yields of strange hadrons to pions are evaluated for a given nu mber of participating nucleons and compared with the observed data. The ca lculation for Cu+Cu collisions is also compared with that of Au+Au collisi ons. The possibility of enhanced production in case of Cu+Cu collisions ar e analysed with different initial conditions. \n\n\n[1]G. Agakishiev et al .\, for STAR Collaboration\, PRL 108\, 072301 (2012).\n\nhttps://events.ve cc.gov.in/event/19/contributions/896/ LOCATION:Main Hall (Coral) URL:https://events.vecc.gov.in/event/19/contributions/896/ END:VEVENT BEGIN:VEVENT SUMMARY:Probing hadronic rescattering via resonance production in Au+Au co llisions at $\\sqrt{s_{NN}}$ = 19.6 and 14.6 GeV from STAR BES-II DTSTART;VALUE=DATE-TIME:20230210T092500Z DTEND;VALUE=DATE-TIME:20230210T094000Z DTSTAMP;VALUE=DATE-TIME:20260907T222003Z UID:indico-contribution-104-883@events.vecc.gov.in DESCRIPTION:Speakers: Aswini Kumar Sahoo (IISER\, Berhampur)\nShort-lived resonances\, like $K^{*0}$\, are useful tools to study particle production mechanisms and the properties of the hadronic phase at the late stage of heavy-ion collisions. Properties of the resonances are expected to be modi fied due to the interaction of their decay daughters with the hadronic med ium via the rescattering and regeneration processes. The particle yield ra tios ($K^{*0}/K\, \\phi/K^{*0}$) can provide information about the interpl ay between these in-medium effects. Recently\, the STAR experiment at RHIC has accumulated high-statistics data samples of Au+Au collisions with enh anced detector capabilities and a wider pseudorapidity coverage during the BES-II program\, which also help extend resonance measurements.\n\nWe wil l report on the measurement of the production of $K^{*0}$ resonances in Au +Au collisions at $\\sqrt{s_{NN}}$ = 19.6 and 14.6 GeV. Results include tr ansverse momentum ($p_T$) spectra\, mean transverse momenta and the integr ated yield as a function of rapidity and charged particle multiplicity. Th e $\\langle p_T \\rangle$ of $K^{*0}$ will be compared with those of other hadrons. The resonance to non-resonance ratios ($K^{*0}/K$) will be shown as a function of centrality to study the rescattering/regeneration effect s. An estimate of the lower limit of the hadronic phase lifetime will be s hown as a function of centrality\, and compared to previous RHIC and LHC r esults.\n\nhttps://events.vecc.gov.in/event/19/contributions/883/ LOCATION:Main Hall (Coral) URL:https://events.vecc.gov.in/event/19/contributions/883/ END:VEVENT BEGIN:VEVENT SUMMARY:Recent highlights on measurement of bulk probes from RHIC DTSTART;VALUE=DATE-TIME:20230210T090000Z DTEND;VALUE=DATE-TIME:20230210T092500Z DTSTAMP;VALUE=DATE-TIME:20260907T222003Z UID:indico-contribution-104-1011@events.vecc.gov.in DESCRIPTION:Speakers: Subhash Singha ()\nhttps://events.vecc.gov.in/event/ 19/contributions/1011/ LOCATION:Main Hall (Coral) URL:https://events.vecc.gov.in/event/19/contributions/1011/ END:VEVENT END:VCALENDAR