Direct photon elliptic flow in Pb–Pb collisions at √sNN = 2.76 TeV
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Abstract
The elliptic flow of inclusive and direct photons was measured at mid-rapidity in two centrality classes 0–20% and 20–40% in Pb–Pb collisions at √sNN = 2.76 TeV by ALICE. Photons were detected with the highly segmented electromagnetic calorimeter PHOS and via conversions in the detector material with the e+e− pairs reconstructed in the central tracking system. The results of the two methods were combined and the direct-photon elliptic flow was extracted in the transverse momentum range 0.9<pT<6.2GeV/c. A comparison to RHIC data shows a similar magnitude of the measured direct-photon elliptic flow. Hydrodynamic and transport model calculations are systematically lower than the data, but are found to be compatible.Citation
ALICE Collaboration, Acharya, S., et al. (2019). 'Direct photon elliptic flow in Pb–Pb collisions at sNN= 2.76 TeV'. Physics Letters B, 789, pp.308-322. DOI: 0.1016/j.physletb.2018.11.039.Publisher
ElsevierJournal
Physics Letters BDOI
10.1016/j.physletb.2018.11.039Additional Links
https://www.sciencedirect.com/science/article/pii/S0370269318308815Type
ArticleLanguage
enISSN
03702693ae974a485f413a2113503eed53cd6c53
10.1016/j.physletb.2018.11.039
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Except where otherwise noted, this item's license is described as © 2018 The Author. Published by Elsevier B.V.