Forward-central two-particle correlations in p-Pb collisions at root s(NN)=5.02 TeV

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F16%3A00458168" target="_blank" >RIV/68378271:_____/16:00458168 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/61389005:_____/16:00458168 RIV/68407700:21340/16:00301010

Výsledek na webu

<a href="http://dx.doi.org/10.1016/j.physletb.2015.12.010" target="_blank" >http://dx.doi.org/10.1016/j.physletb.2015.12.010</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.physletb.2015.12.010" target="_blank" >10.1016/j.physletb.2015.12.010</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Forward-central two-particle correlations in p-Pb collisions at root s(NN)=5.02 TeV

Popis výsledku v původním jazyce

Two-particle angular correlations between trigger particles in the forward pseudorapidity range (2.5 < vertical bar eta vertical bar < 4.0) and associated particles in the central range(vertical bar eta vertical bar < 1.0) are measured with the ALICE detector in p-Pb collisions at a nucleon-nucleon centre-of-mass energy of 5.02 TeV. The trigger particles are reconstructed using the muon spectrometer, and the associated particles by the central barrel tracking detectors. In high-multiplicity events, the double-ridge structure, previously discovered in two-particle angular correlations at midrapidity, is found to persist to the pseudorapidity ranges studied in this Letter. The second-order Fourier coefficients for muons in high-multiplicity events are extracted after jet-like correlations from low-multiplicity events have been subtracted. The coefficients are found to have a similar transverse momentum(p(T)) dependence in p-going (p-Pb) and Pb-going (Pb-p) configurations, with the Pb-going coefficients larger by about 16 +/- 6%, rather independent of p(T) within the uncertainties of the measurement. The data are compared with calculations using the AMPT model, which predicts a different p(T) and eta dependence than observed in the data. The results are sensitive to the parent particle v(2) and composition of reconstructed muon tracks, where the contribution from heavy flavour decays is expected to dominate at p(T) > 2GeV/c.

Název v anglickém jazyce

Forward-central two-particle correlations in p-Pb collisions at root s(NN)=5.02 TeV

Popis výsledku anglicky

Two-particle angular correlations between trigger particles in the forward pseudorapidity range (2.5 < vertical bar eta vertical bar < 4.0) and associated particles in the central range(vertical bar eta vertical bar < 1.0) are measured with the ALICE detector in p-Pb collisions at a nucleon-nucleon centre-of-mass energy of 5.02 TeV. The trigger particles are reconstructed using the muon spectrometer, and the associated particles by the central barrel tracking detectors. In high-multiplicity events, the double-ridge structure, previously discovered in two-particle angular correlations at midrapidity, is found to persist to the pseudorapidity ranges studied in this Letter. The second-order Fourier coefficients for muons in high-multiplicity events are extracted after jet-like correlations from low-multiplicity events have been subtracted. The coefficients are found to have a similar transverse momentum(p(T)) dependence in p-going (p-Pb) and Pb-going (Pb-p) configurations, with the Pb-going coefficients larger by about 16 +/- 6%, rather independent of p(T) within the uncertainties of the measurement. The data are compared with calculations using the AMPT model, which predicts a different p(T) and eta dependence than observed in the data. The results are sensitive to the parent particle v(2) and composition of reconstructed muon tracks, where the contribution from heavy flavour decays is expected to dominate at p(T) > 2GeV/c.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

BF - Elementární částice a fyzika vysokých energií

OECD FORD obor

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Projekt

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

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2016

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

753

Číslo periodika v rámci svazku

FEB

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

14

Strana od-do

126-139

Kód UT WoS článku

000368783600019

EID výsledku v databázi Scopus

2-s2.0-84949652232