Pseudorapidity dependence of the anisotropic flow of charged particles in Pb–Pb collisions at sNN=2.76 TeV

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21340%2F16%3A00306994" target="_blank" >RIV/68407700:21340/16:00306994 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1016/j.physletb.2016.07.017" target="_blank" >http://dx.doi.org/10.1016/j.physletb.2016.07.017</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.physletb.2016.07.017" target="_blank" >10.1016/j.physletb.2016.07.017</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Pseudorapidity dependence of the anisotropic flow of charged particles in Pb–Pb collisions at sNN=2.76 TeV

Popis výsledku v původním jazyce

We present measurements of the elliptic (v<inf>2</inf>), triangular (v<inf>3</inf>) and quadrangular (v<inf>4</inf>) anisotropic azimuthal flow over a wide range of pseudorapidities (-3.5&lt;η&lt;5). The measurements are performed with Pb–Pb collisions at s<inf>NN</inf>=2.76 TeV using the ALICE detector at the Large Hadron Collider (LHC). The flow harmonics are obtained using two- and four-particle correlations from nine different centrality intervals covering central to peripheral collisions. We find that the shape of v<inf>n</inf>(η) is largely independent of centrality for the flow harmonics n=2–4, however the higher harmonics fall off more steeply with increasing |η|. We assess the validity of extended longitudinal scaling of v<inf>2</inf> by comparing to lower energy measurements, and find that the higher harmonic flow coefficients are proportional to the charged particle densities at larger pseudorapidities. Finally, we compare our measurements to both hydrodynamical and transport models, and find they both have challenges when it comes to describing our data.

Název v anglickém jazyce

Pseudorapidity dependence of the anisotropic flow of charged particles in Pb–Pb collisions at sNN=2.76 TeV

Popis výsledku anglicky

We present measurements of the elliptic (v<inf>2</inf>), triangular (v<inf>3</inf>) and quadrangular (v<inf>4</inf>) anisotropic azimuthal flow over a wide range of pseudorapidities (-3.5&lt;η&lt;5). The measurements are performed with Pb–Pb collisions at s<inf>NN</inf>=2.76 TeV using the ALICE detector at the Large Hadron Collider (LHC). The flow harmonics are obtained using two- and four-particle correlations from nine different centrality intervals covering central to peripheral collisions. We find that the shape of v<inf>n</inf>(η) is largely independent of centrality for the flow harmonics n=2–4, however the higher harmonics fall off more steeply with increasing |η|. We assess the validity of extended longitudinal scaling of v<inf>2</inf> by comparing to lower energy measurements, and find that the higher harmonic flow coefficients are proportional to the charged particle densities at larger pseudorapidities. Finally, we compare our measurements to both hydrodynamical and transport models, and find they both have challenges when it comes to describing our data.

Druh

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

CEP obor

BG - Jaderná, atomová a molekulová fyzika, urychlovače

OECD FORD obor

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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

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

762

Číslo periodika v rámci svazku

Nov

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

13

Strana od-do

376-388

Kód UT WoS článku

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EID výsledku v databázi Scopus

2-s2.0-84991716472