Details

Autor(en) / Beteiligte

• Adam, J.
• Aphecetche, Laurent
• Audurier, B.
• Baldisseri, A.
• Batigne, Guillaume
• Belikov, I.
• Borel, H.
• Castellanos, J. Castillo
• Charvet, J.L.
• Cheshkov, C.
• Cheynis, B.
• Ducroux, L.
• Erazmus, B.
• Estienne, Magali
• Feuillard, V.J.G.
• Francisco, A.
• Germain, Marie
• Hamon, J.C.
• Hippolyte, B.
• Kuhn, C.
• Lardeux, A.
• Martinez Garcia, Gines
• Molnar, L.
• Morreale, A.
• Costa, H. Pereira Da
• Pillot, Philippe
• Rakotozafindrabe, A.
• Rami, F.
• Ronflette, L.
• Roy, C.
• Shabetai, Alexandre
• Stocco, Diego
• Teyssier, B.
• Tieulent, R.
• Uras, A.
• Verney, R.
• Barret, V.
• Bastid, N.
• Batista Camejo, A.
• Crochet, P.
• Dupieux, P.
• Li, S.
• Lopez, X.
• Manso, F.
• Porteboeuf-Houssais, S.
• Rosnet, P.
• Vulpescu, B.
• Valle, Z. Conesa Del
• Das, I.
• Espagnon, B.
• Hadjidakis, C.
• Lakomov, I.
• Suire, C.
• Takaki, J. D. Tapia
• Tarhini, M.
• Valencia Palomo, L.
• Conesa Balbastre, G.
• Faivre, J.
• Furget, C.
• Guernane, R.
• Silvestre, C.
• Vauthier, A.

Titel

Elliptic flow of electrons from heavy-flavour hadron decays at mid-rapidity in Pb-Pb collisions at $\mathbf{\sqrt{s_\mathrm{NN}}}$ = 2.76 TeV

Ist Teil von

• The journal of high energy physics, 2016, Vol.9(2016)

Ort / Verlag

Springer Verlag (Germany)

Erscheinungsjahr

2016

Quelle

EZB Electronic Journals Library

Beschreibungen/Notizen

• The elliptic flow of electrons from heavy-flavour hadron decays at mid-rapidity ($|y|$ $<$ 0.7) is measured in Pb-Pb collisions at $\sqrt{s_{\rm NN}} = 2.76$ 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 ($v_{\rm 2}$) represents the elliptic flow. The $v_{\rm 2}$ 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 ($p_{\rm T}$) 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 $v_{\rm 2}$ of electrons from heavy-flavour hadron decays is observed in all centrality classes, with a maximum significance of $5.9\sigma$ in the interval $2 <$ $p_{\rm T}$ $<$ 2.5 GeV/$c$ in semi-central collisions (20-40%). The value of $v_{\rm 2}$ decreases towards more central collisions at low and intermediate $p_{\rm T}$ (0.5 $<$ $p_{\rm T}$ $<$ 3 GeV/$c$). The $v_{\rm 2}$ 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.