Title
Pion, kaon, and proton production in central Pb-Pb collisions at √s<inf>NN</inf>=2.76TeV
Date Issued
18 December 2012
Access level
open access
Resource Type
journal article
Author(s)
Abelev B.
Adam J.
Adamová D.
Adare A.M.
Aggarwal M.M.
Aglieri Rinella G.
Agocs A.G.
Agostinelli A.
Aguilar Salazar S.
Ahammed Z.
Ahmad N.
Ahmad Masoodi A.
Ahn S.A.
Ahn S.U.
Akindinov A.
Aleksandrov D.
Alessandro B.
Alfaro Molina R.
Alici A.
Alkin A.
Almaráz Aviña E.
Alme J.
Alt T.
Altini V.
Altinpinar S.
Altsybeev I.
Andrei C.
Andronic A.
Anguelov V.
Anielski J.
Anson C.
Antičić T.
Antinori F.
Antonioli P.
Aphecetche L.
Appelshäuser H.
Arbor N.
Arcelli S.
Arend A.
Armesto N.
Arnaldi R.
Aronsson T.
Arsene I.C.
Arslandok M.
Asryan A.
Augustinus A.
Averbeck R.
Awes T.C.
Äystö J.
Azmi M.D.
Bach M.
Badalà A.
Baek Y.W.
Bailhache R.
Bala R.
Baldini Ferroli R.
Baldisseri A.
Baldit A.
Baltasar Dos Santos Pedrosa F.
Bán J.
Baral R.C.
Barbera R.
Barile F.
Barnaföldi G.G.
Barnby L.S.
Barret V.
Bartke J.
Basile M.
Bastid N.
Basu S.
Bathen B.
Batigne G.
Batyunya B.
Baumann C.
Bearden I.G.
Beck H.
Behera N.K.
Belikov I.
Bellini F.
Bellwied R.
Belmont-Moreno E.
Bencedi G.
Beole S.
Berceanu I.
Bercuci A.
Berdnikov Y.
Berenyi D.
Bergognon A.A.E.
Berzano D.
Betev L.
Bhasin A.
Bhati A.K.
Bhom J.
Bianchi L.
Bianchi N.
Bianchin C.
Bielčík J.
Bielčíková J.
Bilandzic A.
Bjelogrlic S.
Publisher(s)
American Physical Society
Abstract
In this Letter we report the first results on π±, K±, p, and p̄ production at midrapidity (|y|<0.5) in central Pb-Pb collisions at √sNN=2.76TeV, measured by the ALICE experiment at the LHC. The pT distributions and yields are compared to previous results at √sNN=200GeV 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. © 2012 CERN. Published by the American Physical Society.
Volume
109
Issue
25
Language
English
OCDE Knowledge area
Física de partículas, Campos de la Física
Subjects
Scopus EID
2-s2.0-84871264849
Source
Physical Review Letters
ISSN of the container
00319007
Sponsor(s)
National Science Foundation 0968903, 0969966 NSF
Science and Technology Facilities Council GRIDPP, ST/G008833/1, ST/I003398/1, ST/J000108/1, ST/J000140/1 STFC
Japan Society for the Promotion of Science 20224014, 23244055, 23340074 JSPS
Sources of information:
Directorio de Producción Científica
Scopus