Projects per year
Abstract
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.
Original language | English |
---|---|
Article number | 252301 |
Journal | Physical Review Letters |
Volume | 109 |
Issue number | 25 |
DOIs | |
Publication status | Published - 21 Dec 2012 |
Fingerprint
Dive into the research topics of 'Pion, Kaon, and Proton Production in Central Pb-Pb Collisions at √sNN=2.76 TeV'. Together they form a unique fingerprint.Projects
- 1 Finished
-
Birmingham Nuclear Physics Consolidated Grant
Freer, M., Evans, P., Jones, P., Wheldon, C. & Lazzeroni, C.
SCIENCE & TECHNOLOGY FACILITIES COUNCIL
1/08/11 → 31/07/14
Project: Research Councils