Direct photon elliptic flow in Pb–Pb collisions at sNN=2.76 TeV
(2019) In Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics 789. p.308-322- 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
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- publishing date
- 2019
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
- volume
- 789
- pages
- 15 pages
- publisher
- Elsevier
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- scopus:85059189536
- ISSN
- 0370-2693
- DOI
- 10.1016/j.physletb.2018.11.039
- language
- English
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- yes
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- Export Date: 22 January 2019
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- 2019-01-22 08:58:41
- date last changed
- 2023-04-09 01:32:54
@article{261006a3-834d-4523-a76d-9dab4aed3ff7, 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}}, author = {{Acharya, S and Adolfsson, Jonatan and Christiansen, Peter and Ljunggren, Martin and Nassirpour, Adrian and Oskarsson, Anders and Richert, Tuva and Silvermyr, David and Stenlund, Evert and Vislavicius, Vytautas and Zou, S.}}, issn = {{0370-2693}}, language = {{eng}}, pages = {{308--322}}, publisher = {{Elsevier}}, series = {{Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics}}, title = {{Direct photon elliptic flow in Pb–Pb collisions at sNN=2.76 TeV}}, url = {{http://dx.doi.org/10.1016/j.physletb.2018.11.039}}, doi = {{10.1016/j.physletb.2018.11.039}}, volume = {{789}}, year = {{2019}}, }