Observation of Direct-Photon Collective Flow in Au+Au Collisions at root sNN=200 GeV

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21340%2F12%3A00196399" target="_blank" >RIV/68407700:21340/12:00196399 - isvavai.cz</a>

Result on the web

<a href="http://link.aps.org/doi/10.1103/PhysRevLett.109.122302" target="_blank" >http://link.aps.org/doi/10.1103/PhysRevLett.109.122302</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1103/PhysRevLett.109.122302" target="_blank" >10.1103/PhysRevLett.109.122302</a>

Result language

angličtina

Original language name

Observation of Direct-Photon Collective Flow in Au+Au Collisions at root sNN=200 GeV

Original language description

The second Fourier component v2 of the azimuthal anisotropy with respect to the reaction plane is measured for direct photons at midrapidity and transverse momentum (pT) of 1-12??GeV/c in Au+Au collisions at root sNN=200 GeV. Previous measurements of this quantity for hadrons with pT<6 GeV/c indicate that the medium behaves like a nearly perfect fluid, while for pT>6??GeV/c a reduced anisotropy is interpreted in terms of a path-length dependence for parton energy loss. In this measurement with the PHENIX detector at the Relativistic Heavy Ion Collider we find that for pT>4 GeV/c the anisotropy for direct photons is consistent with zero, which is as expected if the dominant source of direct photons is initial hard scattering.

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

BF - Elementary particle theory and high energy physics

OECD FORD branch

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Project

<a href="/en/project/LA08015" target="_blank" >LA08015: Collaboration of the Czech Republic with CERN</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2012

Confidentiality

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

Name of the periodical

Physical Review Letters

ISSN

0031-9007

e-ISSN

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Volume of the periodical

109

Issue of the periodical within the volume

12

Country of publishing house

US - UNITED STATES

Number of pages

7

Pages from-to

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UT code for WoS article

000308878500006

EID of the result in the Scopus database

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