Elliptic flow of electrons from heavy-flavour hadron decays at mid-rapidity in Pb-Pb collisions at √sNN=2.76 TeV
The elliptic flow of electrons from heavy-flavour hadron decays at mid-rapidity (|y| < 0.7) is measured in Pb-Pb collisions at sNN=2.76$$ \sqrt{s_{\mathrm{NN}}}=2.76 $$TeV with ALICE at the LHC. The particle azimuthal distribution with respect to the reaction plane can be parametrized with a Four...
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| Main Authors: | , , , , , , , , , , , , , , , , , , , , , |
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| Corporate Author: | |
| Format: | Article (Journal) |
| Language: | English |
| Published: |
06 September 2016
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| In: |
Journal of high energy physics
Year: 2016, Issue: 9 |
| ISSN: | 1029-8479 |
| DOI: | 10.1007/JHEP09(2016)028 |
| Online Access: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1007/JHEP09(2016)028
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| Author Notes: | The ALICE collaboration* |
| Summary: | The elliptic flow of electrons from heavy-flavour hadron decays at mid-rapidity (|y| < 0.7) is measured in Pb-Pb collisions at sNN=2.76$$ \sqrt{s_{\mathrm{NN}}}=2.76 $$TeV with ALICE at the LHC. The particle azimuthal distribution with respect to the reaction plane can be parametrized with a Fourier expansion, where the second coefficient (v2) represents the elliptic flow. The v2 coefficient of inclusive electrons is measured in three centrality classes (0-10%, 10-20% and 20-40%) with the event plane and the scalar product methods in the transverse momentum (pT) intervals 0.5-13 GeV/c and 0.5-8 GeV/c, respectively. After subtracting the background, mainly from photon conversions and Dalitz decays of neutral mesons, a positive v2 of electrons from heavy-flavour hadron decays is observed in all centrality classes, with a maximum significance of 5.9σ in the interval 2 < pT < 2.5 GeV/c in semi-central collisions (20-40%). The value of v2 decreases towards more central collisions at low and intermediate pT (0.5 < pT < 3 GeV/c). The v2 of electrons from heavy-flavour hadron decays at mid-rapidity is found to be similar to the one of muons from heavy-flavour hadron decays at forward rapidity (2.5 < y < 4). The results are described within uncertainties by model calculations including substantial elastic interactions of heavy quarks with an expanding strongly-interacting medium. |
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| Item Description: | *The ALICE collaboration: J. Adam, V. Anguelov, M.C. Danisch, A. Deisting, M.G. Fleck, P. Glaessel, S. Klewin, M.L. Knichel, L. Leardini, J. Mercado Perez, K. Oyama, Y. Pachmayer, K. Reygers, R. Schicker, J. Stachel, J. Stiller, M.A. Voelkl, D.F. Weiser, J. Wilkinson, B. Windelband, M. Winn, A. Zimmermann [und sehr viele weitere Personen] Im Titel steht der Ausdruck "sNN" unter dem Wurzelsymbol Gesehen am 21.07.2020 |
| Physical Description: | Online Resource |
| ISSN: | 1029-8479 |
| DOI: | 10.1007/JHEP09(2016)028 |