Direct photon elliptic flow in Pb–Pb collisions √sNN = 2.76 TeV
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 < 6.2 GeV/c. A comparison to RHIC data shows a similar magnitude of the measured directphoton elliptic flow. Hydrodynamic and transport model calculations are systematically lower than the
data, but are found to be compatible.
Main Author
Format
Articles
Research article
Published
2019
Series
Subjects
Publication in research information system
Publisher
Elsevier B.V.
The permanent address of the publication
https://urn.fi/URN:NBN:fi:jyu-201901151205Käytä tätä linkitykseen.
Review status
Peer reviewed
ISSN
0370-2693
DOI
https://doi.org/10.1016/j.physletb.2018.11.039
Language
English
Published in
Physics Letters B
Citation
- ALICE Collaboration. (2019). Direct photon elliptic flow in Pb–Pb collisions √sNN = 2.76 TeV. Physics Letters B, 789, 308-322. https://doi.org/10.1016/j.physletb.2018.11.039
License
Copyright© 2018 The Author.