Systematic study of nuclear effects in p + Al, p + Au, d + Au, and .sup.3./sup.He + Au collisions at √s.sub.NN./sub. = 200 GeV using π.sup.0./sup. production

0566940 - FZÚ 2023 RIV US eng J - Journal Article
Acharya, U.A. - Adare, A. - Aidala, C. - Růžička, Pavel - Tomášek, Lukáš - Tomášek, Michal - Vrba, Václav … Total 547 authors
Systematic study of nuclear effects in p + Al, p + Au, d + Au, and ³He + Au collisions at √s_NN = 200 GeV using π⁰ production.
Physical Review C. Roč. 105, č. 6 (2022), č. článku 064902. ISSN 2469-9985. E-ISSN 2469-9993
Institutional support: RVO:68378271
Keywords : enhancement * suppression * initial state
OECD category: Particles and field physics
Impact factor: 3.1, year: 2022
Method of publishing: Limited access
https://doi.org/10.1103/PhysRevC.105.064902

The PHENIX Collaboration presents a systematic study of inclusive π0 production from p+p, p+Al, p+Au, d+Au, and He3+Au collisions at sNN=200GeV. Measurements were performed with different centrality selections as well as the total inelastic, 0–100%, selection for all collision systems. For 0–100% collisions, the nuclear-modification factors, RxA, are consistent with unity for pT above 8GeV/c, but exhibit an enhancement in peripheral collisions and a suppression in central collisions. The enhancement and suppression characteristics are similar for all systems for the same centrality class. It is shown that for high-pT-π0 production, the nucleons in the d and He3 interact mostly independently with the Au nucleus and that the counterintuitive centrality dependence is likely due to a physical correlation between multiplicity and the presence of a hard scattering process.
Permanent Link: https://hdl.handle.net/11104/0338208