Direct photon elliptic flow in Pb-Pb collisions at $\sqrt{s_{{}_{\mathrm{NN}}}}=2.76$ TeV

Abstract

The elliptic flow of inclusive and direct photons was measured by ALICE for central and semi-central Pb--Pb collisions at $\sqrt{s_{{}_{\mathrm{NN}}}}=2.76$ TeV. The photons were reconstructed using the electromagnetic calorimeter PHOS and the central tracking system. The inclusive photon flow reconstructed with both methods are combined and used to extract the direct photon flow, using a decay photon simulation and the direct photon excess R${}_{\gamma }$, in the transverse momentum range $0.9<p_{\mathrm{T}}<6.2$ GeV/c. We find agreement to earlier results obtained at RHIC, and the theoretical predictions generally under-predict the results.

arXiv commentProceedings Quark Matter 2018, Venice, Italy

References in corpus (9)

• The chiral and deconfinement aspects of the QCD transition
• Full result for the QCD equation of state with 2+1 flavors
• Flow Study in Relativistic Nuclear Collisions by Fourier Expansion of Azimuthal Particle Distributions
• Elliptic flow from two- and four-particle correlations in Au + Au collisions at sqrt{s_{NN}} = 130 GeV
• Direct photon production in Pb-Pb collisions at $\sqrt{s_\rm{NN}}$ = 2.76 TeV
• Production and Elliptic Flow of Dileptons and Photons in the semi-Quark Gluon Plasma
• Centrality dependence of the direct photon yield and elliptic flow in heavy-ion collisions at sqrt(s)=200 GeV
• Hadronic and partonic sources of direct photons in relativistic heavy-ion collisions
• Anisotropic flow of thermal photons at RHIC and LHC

Cited by in corpus (1)

• Probing Early-Time Dynamics and Quark-Gluon Plasma Transport Properties with Photons and Hadrons