Study of charged particle production at high pT using event topology in pp, p-Pb and Pb-Pb collisions at √sNN = 5.02 TeV

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389005%3A_____%2F23%3A00577062" target="_blank" >RIV/61389005:_____/23:00577062 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/68378271:_____/23:00577062

Výsledek na webu

<a href="https://doi.org/10.1016/j.physletb.2022.137649" target="_blank" >https://doi.org/10.1016/j.physletb.2022.137649</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.physletb.2022.137649" target="_blank" >10.1016/j.physletb.2022.137649</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Study of charged particle production at high pT using event topology in pp, p-Pb and Pb-Pb collisions at √sNN = 5.02 TeV

Popis výsledku v původním jazyce

This letter reports measurements which characterize the underlying event associated with hard scatterings at mid-pseudorapidity (|eta| < 0.8) in pp, p-Pband Pb-Pb collisions at centre-of-mass energy per nucleon pair, root sNN= 5.02TeV. The measurements are performed with ALICE at the LHC. Different multiplicity classes are defined based on the event activity measured at forward rapidities. The hard scatterings are identified by the leading particle defined as the charged particle with the largest transverse momentum (pT) in the collision and having 8< pT< 15GeV/c. The p(T) spectra of associated particles (0.5= pT< 6GeV/c) are measured in different azimuthal regions defined with respect to the leading particle direction: toward, transverse, and away. The associated charged particle yields in the transverse region are subtracted from those of the away and toward regions. The remaining jet-like yields are reported as a function of the multiplicity measured in the transverse region. The measurements show a suppression of the jet-like yield in the away region and an enhancement of high-p(T) associated particles in the toward region in central Pb-Pb collisions, as compared to minimum-bias pp collisions. These observations are consistent with previous measurements that used two-particle correlations, and with an interpretation in terms of parton energy loss in a high-density quark gluon plasma. These yield modifications vanish in peripheral Pb-Pb collisions and are not observed in either high-multiplicity pp or p-Pb collisions.

Název v anglickém jazyce

Study of charged particle production at high pT using event topology in pp, p-Pb and Pb-Pb collisions at √sNN = 5.02 TeV

Popis výsledku anglicky

This letter reports measurements which characterize the underlying event associated with hard scatterings at mid-pseudorapidity (|eta| < 0.8) in pp, p-Pband Pb-Pb collisions at centre-of-mass energy per nucleon pair, root sNN= 5.02TeV. The measurements are performed with ALICE at the LHC. Different multiplicity classes are defined based on the event activity measured at forward rapidities. The hard scatterings are identified by the leading particle defined as the charged particle with the largest transverse momentum (pT) in the collision and having 8< pT< 15GeV/c. The p(T) spectra of associated particles (0.5= pT< 6GeV/c) are measured in different azimuthal regions defined with respect to the leading particle direction: toward, transverse, and away. The associated charged particle yields in the transverse region are subtracted from those of the away and toward regions. The remaining jet-like yields are reported as a function of the multiplicity measured in the transverse region. The measurements show a suppression of the jet-like yield in the away region and an enhancement of high-p(T) associated particles in the toward region in central Pb-Pb collisions, as compared to minimum-bias pp collisions. These observations are consistent with previous measurements that used two-particle correlations, and with an interpretation in terms of parton energy loss in a high-density quark gluon plasma. These yield modifications vanish in peripheral Pb-Pb collisions and are not observed in either high-multiplicity pp or p-Pb collisions.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10304 - Nuclear physics

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2023

Kód důvěrnosti údajů

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

Název periodika

Physics Letters. B

ISSN

0370-2693

e-ISSN

1873-2445

Svazek periodika

843

Číslo periodika v rámci svazku

AUG

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

14

Strana od-do

137649

Kód UT WoS článku

001057186200001

EID výsledku v databázi Scopus

2-s2.0-85162990010