Direct photon elliptic flow in Pb–Pb collisions at sNN=2.76 TeV

Research output: Contribution to journalArticle

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. © 2018 The Author

Details

Authors
Organisations
External organisations
  • Utrecht University
  • University of Copenhagen
  • Variable Energy Cyclotron Centre
  • Central China Normal University (CCNU)
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Subatomic Physics
Original languageEnglish
Pages (from-to)308-322
Number of pages15
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume789
Publication statusPublished - 2019
Publication categoryResearch
Peer-reviewedYes

Bibliographic note

Export Date: 22 January 2019