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PreprintCC BY-NC-ND 4.0arXiv

Non-Monotonicity of pT Correlations in Au + Au Collisions at RHIC

  • Rutik Manikandhan
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Abstract

We report the first measurements of two-particle transverse momentum correlations for mid-rapidity charged particles in Au+Au collisions at √(sNN) = 3.0, 3.2, 3.5, 3.9, 4.5, 5.2 and 7.7 GeV recorded by the STAR experiment. The results are compared with previous STAR measurements from the Beam Energy Scan Phase I (BES-I) and with transport model calculations. The measured two-particle pT correlators exhibit an approximate power-law scaling with the number of participating nucleons (Npart), consistent with expectations from an independent-source scenario. This scaling is least well described at the lowest collision energy, √(sNN) = 3.0~GeV. Furthermore, a non-monotonic energy dependence of the pT correlations is observed in central collisions, representing the first systematic observation of such behavior as a function of collision energy.

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Cite

BibTeXRIS
BibTeX
@misc{manikandhan2026nonmonotonicity,
  title = {{Non-Monotonicity of $p_\rm T$ Correlations in Au + Au Collisions at RHIC}},
  author = {Rutik Manikandhan},
  howpublished = {arXiv},
  year = {2026},
  month = sep,
  doi = {10.48550/arxiv.2609.26449},
  eprint = {2609.26449},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2609.26449},
  note = {CC BY-NC-ND 4.0},
}
RIS
TY  - UNPB
TI  - Non-Monotonicity of p_T Correlations in Au + Au Collisions at RHIC
AU  - Rutik Manikandhan
PY  - 2026
DA  - 2026/09/22
PB  - arXiv
DO  - 10.48550/arxiv.2609.26449
UR  - https://arxiv.org/abs/2609.26449
AB  - We report the first measurements of two-particle transverse momentum correlations for mid-rapidity charged particles in Au+Au collisions at √(s_NN) = 3.0, 3.2, 3.5, 3.9, 4.5, 5.2 and 7.7 GeV recorded by the STAR experiment. The results are compared with previous STAR measurements from the Beam Energy Scan Phase I (BES-I) and with transport model calculations. The measured two-particle p_T correlators exhibit an approximate power-law scaling with the number of participating nucleons (N_part), consistent with expectations from an independent-source scenario. This scaling is least well described at the lowest collision energy, √(s_NN) = 3.0~GeV. Furthermore, a non-monotonic energy dependence of the p_T correlations is observed in central collisions, representing the first systematic observation of such behavior as a function of collision energy.
ER  -