Direct photon elliptic flow in Pb-Pb collisions at root s(NN)=2.76 TeV



Acharya, S, Acosta, FT, Adamova, D, Adolfsson, J, Aggarwal, MM, Rinella, G Aglieri, Agnello, M, Agrawal, N, Ahammed, Z, Ahn, SU
et al (show 1003 more authors) (2019) Direct photon elliptic flow in Pb-Pb collisions at root s(NN)=2.76 TeV. PHYSICS LETTERS B, 789. pp. 308-322.

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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.

Item Type: Article
Uncontrolled Keywords: 5106 Nuclear and Plasma Physics, 5107 Particle and High Energy Physics, 51 Physical Sciences
Depositing User: Symplectic Admin
Date Deposited: 01 May 2019 09:42
Last Modified: 20 Jun 2024 19:06
DOI: 10.1016/j.physletb.2018.11.039
Open Access URL: https://doi.org/10.1016/j.physletb.2018.11.039
Related URLs:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3039189