Searching for the Baryon-to-Meson Transition Region with the MPD at NICA

Ayala, Alejandro; Bietenholz, Wolfgang; Cuautle, Eleazar; Formentí, Rodrigo García; Guzmán, Rodrigo

doi:10.1134/s1063778823050071

Cited by 1 publication

(1 citation statement)

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“…Different studies using various models have reported conflicting results concerning the onset of phase transitions, making it an open question in the community. For instance, some works report phase transition at energies as low as 7.7 GeV or as high as 14.5 GeV [5,41,42]. Additionally, there is an ongoing debate about the behaviour of T at energies beyond 39 GeV.…”

Section: Nnmentioning

confidence: 99%

Thermodynamic signatures and phase transitions in high-energy Au–Au collision

Badshah,

Waqas,

Ajaz

et al. 2024

J. Phys. G: Nucl. Part. Phys.

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In this study, we systematically investigate the dynamics of various particles namely π+, π−, K+, K−, p, ̄p, Λ, ̄Λ, Ξ− and ̄Ξ+ produced in central Au-Au collisions. We analyze data of AGS and RHIC, which span a broad range of collision energies, ranging from √sN N = 1.9 to 200 GeV. To analyze the transverse momentum (pT ) and transverse mass (mT ) distributions, we employ a two-component standard distribution function, achieving a very good representation of the experimental data across these energy regimes. We extract key thermodynamic parameters, including the effective temperature T , the mean transverse momentum ⟨pT ⟩, and the initial temperature Ti, and analyze their dependence on the values of collision energy and particle mass. Our findings reveal a distinct transition behaviour around √sN N = 19.6 GeV. Below √sN N = 19.6 GeV, the values of T , ⟨pT ⟩, and Ti increase monotonically for all particles due to higher energy transfer into the system. Above this energy threshold, these extracted parameters plateau, suggesting that the additional energy is utilized as latent heat for phase transition rather than increasing the system’s temperature. These observations delineate two distinct regions: a baryon-dominated region at lower energies and a parton-dominated region at higher energies, each potentially indicative of different phases of matter, with the latter possibly signalling the onset of a Quark-Gluon Plasma (QGP). The study thus provides critical insights into the complex interplay of thermodynamics, phase transitions, and particle interactions in high-energy Au-Au collisions.

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Section: Nnmentioning

confidence: 99%