Details

Autor(en) / Beteiligte

• Abelev, B.
• Aphecetche, Laurent
• Baldisseri, A.
• Barret, V.
• Bastid, N.
• Batigne, Guillaume
• Bergognon, A.A.E.
• Borel, H.
• Bregant, M.
• Castillo Castellanos, J.
• Charvet, J.L.
• Cheshkov, C.
• Cheynis, B.
• Crochet, P.
• Delagrange, H.
• Ducroux, L.
• Dupieux, P.
• Erazmus, B.
• Estienne, Magali
• Germain, Marie
• Grossiord, J.-Y.
• Guilbaud, Maxime
• Hippolyte, B.
• Kuhn, C.
• Lopez, X.
• Manso, F.
• Martinez Garcia, Gines
• Martin Blanco, J.
• Mas, A.
• Massacrier, L.
• Molnar, L.
• Pereira da Costa, H.
• Pillot, Philippe
• Porteboeuf-Houssais, S.
• Rakotozafindrabe, A.
• Rosnet, P.
• Roy, C.
• Sanchez Castro, X.
• Schutz, Y.
• Shabetai, Alexandre
• Stocco, Diego
• Tieulent, R.
• Uras, A.
• Vernet, R.
• Vulpescu, B.
• Yang, H.
• Zhang, X.
• Zoccarato, Y.
• Baek, Y.W.
• Li, S.
• Marchisone, M.
• Arbor, N.
• Conesa Balbastre, G.
• Faivre, J.
• Furget, C.
• Guernane, R.
• Kox, S.
• Real, J.S.
• Silvestre, C.
• Conesa del Valle, Z.
• Das, I.
• Espagnon, B.
• Hadjidakis, C.
• Hřivnáčová, I.
• Lakomov, I.
• Suire, C.
• D. Tapia Takaki, J.
• Valencia Palomo, L.

Titel

K^0_S and {\Lambda} production in Pb-Pb collisions at sqrt(sNN) = 2.76 TeV

Ist Teil von

• Physical review letters, 2013, Vol.111

Ort / Verlag

American Physical Society

Erscheinungsjahr

2013

Quelle

PROLA - Physical Review Online Archive

Beschreibungen/Notizen

• The ALICE measurement of K^0_S and {\Lambda} production at mid-rapidity in Pb-Pb collisions at sqrt(sNN) = 2.76 TeV is presented. The transverse momentum (pT) spectra are shown for several collision centrality intervals and in the pT range from 0.4 GeV/c (0.6 GeV/c for {\Lambda}) to 12 GeV/c. The pT dependence of the {\Lambda}/K^0_S ratios exhibits maxima in the vicinity of 3 GeV/c, and the positions of the maxima shift towards higher pT with increasing collision centrality. The magnitude of these maxima increases by almost a factor of three between most peripheral and most central Pb-Pb collisions. This baryon excess at intermediate pT is not observed in pp interactions at sqrt(s) = 0.9 TeV and at sqrt(s) = 7 TeV. Qualitatively, the baryon enhancement in heavy-ion collisions is expected from radial flow. However, the measured pT spectra above 2 GeV/c progressively decouple from hydrodynamical-model calculations. For higher values of pT, models that incorporate the influence of the medium on the fragmentation and hadronization processes describe qualitatively the pT dependence of the {\Lambda}/K^0_S ratio.