PoS - Proceedings of Science
Volume 340 - The 39th International Conference on High Energy Physics (ICHEP2018) - Parallel: Heavy Ions
Direct-photon elliptic flow in Pb-Pb collisions at $\sqrt{s_{NN}}=2.76$ TeV
M.H.P. Sas*  on behalf of the ALICE collaboration
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Published on: August 02, 2019
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 cocktail simulation and the direct-photon excess R$_{\gamma}$, in the transverse momentum range $0.9 < p_{T} < 6.2$GeV/c.
We find that the theoretical predictions generally under-predict the results.
DOI: https://doi.org/10.22323/1.340.0442
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