Nuclear Modification Factor of Inclusive Charged Particles in Au+Au Collisions at (Formula Presented.) = 27 GeV with the STAR Experiment
Aitbayev A.
March 2024Multidisciplinary Digital Publishing Institute (MDPI)
Universe
2024#10Issue 3
The Beam Energy Scan (BES) program at RHIC aims to explore the QCD phase diagram, including the search for the evidence of the 1st order phase transition from hadronic matter to Quark-Gluon Plasma (QGP) and the location of the QCD critical point. One of the features previously observed in the study of QGP is the effect of suppression of particle production with high transverse momenta (Formula presented.) (>2 GeV/c) at energies (Formula presented.) = (Formula presented.) GeV, which was deduced from the charged-particle nuclear modification factor ((Formula presented.)) measured using the data from Beam Energy Scan Program Phase I (BES-I) of STAR experiment. In 2018, STAR has collected over 500 million events from (Formula presented.) + (Formula presented.) collisions at (Formula presented.) = 27 GeV as a part of the STAR BES-II program, which is about a factor of 10 higher than BES-I 27 GeV data size. In this report, we present new measurements of charged particle production and the nuclear modification factor (Formula presented.), from this new 27 GeV data set and compare them with the BES-I results. The new measurements extend the previous BES-I results to higher transverse momentum range, which allows better exploration of the jet quenching effects at low RHIC energies, and may help to understand the effects of the formation and properties of QGP at these energies.
charged particle production , heavy ion collisions , nuclear modification , QCD phase transition
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Joint Institute for Nuclear Research (JINR), Joliot-Curie 20, Dubna, 141980, Russian Federation
Faculty of Physics and Technology, Al-Farabi Kazakh National University, Almaty, 050040, Kazakhstan
Joint Institute for Nuclear Research (JINR)
Faculty of Physics and Technology
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