Pion, Kaon, and Proton Production in Central Pb-Pb Collisions at √sNN=2.76 TeV (CROSBI ID 198818)
Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija
Podaci o odgovornosti
Abelev, B. ; ... ; Antičić, Tome ; ... ; Gotovac, Sven ; ... ; Mudnić, Eugen ; ... ; Planinić, Mirko ; ... ; Simatović, Goran ; ... ; Šuša, Tatjana ; ... ; Vicković, Linda ; ... ; Zyzak, M.
engleski
Pion, Kaon, and Proton Production in Central Pb-Pb Collisions at √sNN=2.76 TeV
In this Letter we report the first results on π±, K±, p, and p̅ production at midrapidity (|y|<0.5) in central Pb-Pb collisions at √sNN=2.76 TeV, measured by the ALICE experiment at the LHC. The pT distributions and yields are compared to previous results at √sNN=200 GeV and expectations from hydrodynamic and thermal models. The spectral shapes indicate a strong increase of the radial flow velocity with √sNN, which in hydrodynamic models is expected as a consequence of the increasing particle density. While the K/π ratio is in line with predictions from the thermal model, the p/π ratio is found to be lower by a factor of about 1.5. This deviation from thermal model expectations is still to be understood.
LHC; ALICE; Pb+Pb; 2.76 TeV; pion; kaon; proton; production
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Podaci o izdanju
109
2012.
252301-1-252301-11
objavljeno
0031-9007
10.1103/PhysRevLett.109.252301