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001-es BibID:	BIBFORM122366
035-os BibID:	(WoS)000813270700001 (Scopus)85132354628
Első szerző:	PHENIX Collaboration
Cím:	Systematic study of nuclear effects in p+Al, p+Au, d+Au, and ^3He+Au collisions at root{s_NN} = 200 GeV using pi^0 production / PHENIX Collaboration
Dátum:	2022
ISSN:	2469-9985 2469-9993
Megjegyzések:	The PHENIX Collaboration presents a systematic study of inclusive pi^0 production from p+p, p+Al, p+Au, d+Au, and He3+Au collisions at root 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-pi^0 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. These observations disfavor models where parton energy loss has a significant contribution to nuclear modifications in small systems. Nuclear modifications at lower pT resemble the Cronin effect - an increase followed by a peak in central or inelastic collisions and a plateau in peripheral collisions. The peak height has a characteristic ordering by system size as p+Au>d+Au>He3+Au>p+Al. For collisions with Au ions, current calculations based on initial-state cold nuclear matter effects result in the opposite order, suggesting the presence of other contributions to nuclear modifications, in particular at lower pT.
Tárgyszavak:	Természettudományok Fizikai tudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk
Megjelenés:	Physical Review C. - 105 : 6 (2022), p. 1-21. -
További szerzők:	Lovász K. (fizikus) Majoros Tamás Sun, Z. (fizikus) Tarnai G. Ujvári Balázs (1977-) (fizikus)
Internet cím:	Szerző által megadott URL DOI Intézményi repozitóriumban (DEA) tárolt változat
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