Direct photon elliptic flow in Pb–Pb collisions √sNN = 2.76 TeV
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
Published in
Physics Letters BAuthors
Date
2019Copyright
© 2018 The Author.
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.
Publisher
Elsevier B.V.ISSN Search the Publication Forum
0370-2693Publication in research information system
https://converis.jyu.fi/converis/portal/detail/Publication/28870075
Metadata
Show full item recordCollections
License
Related items
Showing items with similar title or keywords.
-
Low-momentum direct-photon measurement in Cu + Cu collisions at √sNN = 200 GeV
PHENIX Collaboration (American Physical Society, 2018)We measured direct photons for pT < 5 GeV/c in minimum bias and 0%–40% most-central events at midrapidity for Cu+Cu collisions at √sNN = 200 GeV. The e+e− contribution from quasireal direct virtual photons has been ... -
Direct photon production at low transverse momentum in proton-proton collisions at √s = 2.76 and 8 TeV
ALICE Collaboration (American Physical Society, 2019)Measurements of inclusive and direct photon production at midrapidity in pp collisions at √s=2.76 and 8 TeV are presented by the ALICE experiment at the LHC. The results are reported in transverse momentum ranges of 0.4<pT<10 ... -
Measurement of jet-medium interactions via direct photon-hadron correlations in Au+Au and d+Au collisions at √sNN = 200 GeV
PHENIX Collaboration (American Physical Society (APS), 2020)We present direct photon-hadron correlations in 200 GeV/A Au+Au, d+Au, and p+p collisions, for direct photon pT from 5–12 GeV/c, collected by the PHENIX Collaboration in the years from 2006 to 2011. We observe no significant ... -
Low-pT direct-photon production in Au+Au collisions at √sNN = 39 and 62.4 GeV
PHENIX Collaboration (American Physical Society (APS), 2023)The measurement of direct photons from Au+Au collisions at √sNN=39 and 62.4 GeV in the transverse-momentum range 0.4<3Gev/c is presented by the PHENIX collaboration at the BNLRelativistic Heavy Ion Collider. A significant ... -
Beam Energy and Centrality Dependence of Direct-Photon Emission from Ultrarelativistic Heavy-Ion Collisions
PHENIX Collaboration (American Physical Society, 2019)The PHENIX collaboration presents first measurements of low-momentum (0.41 GeV/c) direct-photon yield dNdirγ/dη is a smooth function of dNch/dη and can be well described as proportional to (dNch/dη)α with α≈1.25. This ...