Systematic study of nuclear effects in p plus Al, p plus Au, d + Au, and He-3 + Au collisions at root S-NN=200 GeV using pi(0) production

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F22%3A10445581" target="_blank" >RIV/00216208:11320/22:10445581 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/68407700:21340/22:00361152

Výsledek na webu

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=y5SyoSoXFM" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=y5SyoSoXFM</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1103/PhysRevC.105.064902" target="_blank" >10.1103/PhysRevC.105.064902</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Systematic study of nuclear effects in p plus Al, p plus Au, d + Au, and He-3 + Au collisions at root S-NN=200 GeV using pi(0) production

Popis výsledku v původním jazyce

The PHENIX Collaboration presents a systematic study of inclusive pi(0) production from p + p, p + Al, p + Au, d + Au, and He-3 + Au collisions at root S-NN = 200 GeV. 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, R-xA, are consistent with unity for P-T above 8 GeV/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-p(T)-pi(0) production, the nucleons in the d and He-3 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 p(T) 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 &gt; d + Au &gt; He-3 + Au &gt; 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 p(T).

Název v anglickém jazyce

Systematic study of nuclear effects in p plus Al, p plus Au, d + Au, and He-3 + Au collisions at root S-NN=200 GeV using pi(0) production

Popis výsledku anglicky

The PHENIX Collaboration presents a systematic study of inclusive pi(0) production from p + p, p + Al, p + Au, d + Au, and He-3 + Au collisions at root S-NN = 200 GeV. 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, R-xA, are consistent with unity for P-T above 8 GeV/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-p(T)-pi(0) production, the nucleons in the d and He-3 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 p(T) 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 &gt; d + Au &gt; He-3 + Au &gt; 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 p(T).

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10300 - Physical sciences

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2022

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Physical Review C

ISSN

2469-9985

e-ISSN

2469-9993

Svazek periodika

105

Číslo periodika v rámci svazku

6

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

19

Strana od-do

064902

Kód UT WoS článku

000813270700001

EID výsledku v databázi Scopus

2-s2.0-85132354628