Particle-yield modification in jet-like azimuthal dihadron correlations in Pb-Pb collisions at \(\sqrt{s_{NN}}\) = 2.76 TeV

The yield of charged particles associated with high-pT trigger particles (8 < pT < 15 GeV/c) is measured with the ALICE detector in Pb-Pb collisions at \(\sqrt{s_{NN}}\) = 2.76 TeV relative to proton-proton collisions at the same energy. The conditional per-trigger yields are extracted from th...

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Main Authors: Aamodt, Kenneth, Altinpinar, Sedat, Djuvsland, Øystein, Fehlker, Dominik, Haaland, Øystein Senneset, Huang, Meidana, Kanaki, Kalliopi, Larsen, Dag Toppe, Lien, Jørgen, Liu, Lijiao, Lønne, Per-Ivar, Nystrand, Joakim, Øvrebekk, Gaute, Richter, Matthias, Røhrich, Dieter, Skjerdal, Kyrre, Szostak, Artur Krzysztof, Ullaland, Kjetil, Wagner, Boris, Alme, Johan, Erdal, Hege Austrheim, Helstrup, Håvard, Hetland, Kristin Fanebust, Kileng, Bjarte, Dordic, Olja, Eyyubova, Gyulnara, Lindal, Svein, Løvhøiden, Gunnar, Milosevic, Jovan, Nilsson, Mads Stormo, Pocheptsov, Timur Anatolievich, Qvigstad, Henrik, Skaali, Toralf Bernhard, Tveter, Trine Spedstad, Wikne, Jon Christopher, Abelev, Betty, Abrahantes Quintana, Arian, Adamová, Dagmar, Adare, Andrew Marshall, Aggarwal, Madan M, Aglieri Rinella, Gianluca, Agocs, Andreas Gabor, Agostinelli, Andrea, Aguilar Salazar, Saul, Ahammed, Zubayer, Ahmad, Nazeer, Ahmad Masoodi, Arshar, Ahn, Sang Un, Akindinov, Alexander, Aleksandrov, Dimitry
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Language:English
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Summary:The yield of charged particles associated with high-pT trigger particles (8 < pT < 15 GeV/c) is measured with the ALICE detector in Pb-Pb collisions at \(\sqrt{s_{NN}}\) = 2.76 TeV relative to proton-proton collisions at the same energy. The conditional per-trigger yields are extracted from the narrow jet-like correlation peaks in azimuthal di-hadron correlations. In the 5% most central collisions, we observe that the yield of associated charged particles with transverse momenta pT > 3 GeV/c on the away-side drops to about 60% of that observed in pp collisions, while on the near-side a moderate enhancement of 20-30% is found.