Net-Proton Number Cumulants in Strongly and Weakly Coupled QGP
Fuente:
arXiv
Gespeichert in:
| 1. Verfasser: | |
|---|---|
| Format: | Preprint |
| Veröffentlicht: |
2024
|
| Schlagworte: | |
| Online-Zugang: | |
| Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
| _version_ | 1866913566762729472 |
|---|---|
| author | Mamo, Kiminad A. |
| author_facet | Mamo, Kiminad A. |
| contents | We provide a description of the QCD phase diagram across different energy regimes. Without any adjustable free parameters fitted to lattice or experimental data, we demonstrate that the net-proton number cumulant ratios from the Beam Energy Scan-I (BES-I) central ($0-5\%$) Au+Au collision experiments at RHIC, for center-of-mass energies $\sqrt{s} \geq 39\,\text{GeV}$, are well described by the $\textit{dynamical soft-wall}$ AdS black hole model, indicating the formation of a strongly coupled quark-gluon plasma (sQGP) dominated by gluons in the large $N_c$ limit. We identify a critical point at $μ_B = 247\,\text{MeV}$ or $\sqrt{s}=16\,\text{GeV}$ in this model, where net-proton cumulant ratios show non-monotonic variation. However, for $\sqrt{s} < 39\,\text{GeV}$, the recent BES-II data does not exhibit the expected variation due to the critical point, suggesting instead a transition to a nearly-cold ($μ_B \gg T$) weakly coupled QGP (wQGP), for $\sqrt{s} < 7.7\,\text{GeV}$, dominated by valence quarks. This prediction can be tested by the upcoming STAR Fixed-Target experimental data. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2407_06327 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Net-Proton Number Cumulants in Strongly and Weakly Coupled QGP Mamo, Kiminad A. High Energy Physics - Phenomenology High Energy Physics - Theory Nuclear Experiment Nuclear Theory We provide a description of the QCD phase diagram across different energy regimes. Without any adjustable free parameters fitted to lattice or experimental data, we demonstrate that the net-proton number cumulant ratios from the Beam Energy Scan-I (BES-I) central ($0-5\%$) Au+Au collision experiments at RHIC, for center-of-mass energies $\sqrt{s} \geq 39\,\text{GeV}$, are well described by the $\textit{dynamical soft-wall}$ AdS black hole model, indicating the formation of a strongly coupled quark-gluon plasma (sQGP) dominated by gluons in the large $N_c$ limit. We identify a critical point at $μ_B = 247\,\text{MeV}$ or $\sqrt{s}=16\,\text{GeV}$ in this model, where net-proton cumulant ratios show non-monotonic variation. However, for $\sqrt{s} < 39\,\text{GeV}$, the recent BES-II data does not exhibit the expected variation due to the critical point, suggesting instead a transition to a nearly-cold ($μ_B \gg T$) weakly coupled QGP (wQGP), for $\sqrt{s} < 7.7\,\text{GeV}$, dominated by valence quarks. This prediction can be tested by the upcoming STAR Fixed-Target experimental data. |
| title | Net-Proton Number Cumulants in Strongly and Weakly Coupled QGP |
| topic | High Energy Physics - Phenomenology High Energy Physics - Theory Nuclear Experiment Nuclear Theory |
| url | https://arxiv.org/abs/2407.06327 |