Measurement of jet radial profiles in Pb-Pb collisions at root s(NN)=2.76 TeV

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389005%3A_____%2F19%3A00508838" target="_blank" >RIV/61389005:_____/19:00508838 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/68378271:_____/19:00508838 RIV/68407700:21340/19:00337992

Výsledek na webu

<a href="https://doi.org/10.1016/j.physletb.2019.07.020" target="_blank" >https://doi.org/10.1016/j.physletb.2019.07.020</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.physletb.2019.07.020" target="_blank" >10.1016/j.physletb.2019.07.020</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Measurement of jet radial profiles in Pb-Pb collisions at root s(NN)=2.76 TeV

Popis výsledku v původním jazyce

The jet radial structure and particle transverse momentum (p(T)) composition within jets are presented in centrality-selected Pb-Pb collisions at root s(NN) = 2.76 TeV. Track-based jets, which are also called charged jets, were reconstructed with a resolution parameter of R = 0.3 at midrapidity vertical bar eta(chjet)vertical bar < 0.6 for transverse momenta P-T,P- (ch jet) = 30-120 GeV/c. Jet-hadron correlations in relative azimuth and pseudorapidity space (Delta phi/Delta eta) are measured to study the distribution of the associated particles around the jet axis for different p(T, assoc)-ranges between 1 and 20 GeV/c. The data in Pb-Pb collisions are compared to reference distributions for pp collisions, obtained using embedded PYTHIA simulations. The number of high-p(T) associate particles (4 < p(T,assoc) < 20 GeV/c) in Pb-Pb collisions is found to be suppressed compared to the reference by 30 to 10%, depending on centrality. The radial particle distribution relative to the jet axis shows a moderate modification in Pb-Pb collisions with respect to PYTHIA. High-p(T) associate particles are slightly more collimated in Pb-Pb collisions compared to the reference, while low-p(T) associate particles tend to be broadened. The results, which are presented for the first time down to p(T, chjet) = 30 GeV/c in Pb-Pb collisions, are compatible with both previous jet-hadron-related measurements from the CMS Collaboration and jet shape measurements from the ALICE Collaboration at higher p(T), and add further support for the established picture of in-medium parton energy loss.

Název v anglickém jazyce

Measurement of jet radial profiles in Pb-Pb collisions at root s(NN)=2.76 TeV

Popis výsledku anglicky

The jet radial structure and particle transverse momentum (p(T)) composition within jets are presented in centrality-selected Pb-Pb collisions at root s(NN) = 2.76 TeV. Track-based jets, which are also called charged jets, were reconstructed with a resolution parameter of R = 0.3 at midrapidity vertical bar eta(chjet)vertical bar < 0.6 for transverse momenta P-T,P- (ch jet) = 30-120 GeV/c. Jet-hadron correlations in relative azimuth and pseudorapidity space (Delta phi/Delta eta) are measured to study the distribution of the associated particles around the jet axis for different p(T, assoc)-ranges between 1 and 20 GeV/c. The data in Pb-Pb collisions are compared to reference distributions for pp collisions, obtained using embedded PYTHIA simulations. The number of high-p(T) associate particles (4 < p(T,assoc) < 20 GeV/c) in Pb-Pb collisions is found to be suppressed compared to the reference by 30 to 10%, depending on centrality. The radial particle distribution relative to the jet axis shows a moderate modification in Pb-Pb collisions with respect to PYTHIA. High-p(T) associate particles are slightly more collimated in Pb-Pb collisions compared to the reference, while low-p(T) associate particles tend to be broadened. The results, which are presented for the first time down to p(T, chjet) = 30 GeV/c in Pb-Pb collisions, are compatible with both previous jet-hadron-related measurements from the CMS Collaboration and jet shape measurements from the ALICE Collaboration at higher p(T), and add further support for the established picture of in-medium parton energy loss.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10304 - Nuclear physics

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

2019

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

—

Svazek periodika

796

Číslo periodika v rámci svazku

9

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

16

Strana od-do

204-219

Kód UT WoS článku

000483426200028

EID výsledku v databázi Scopus

2-s2.0-85069829100