Centrality dependence of Pi, K, p production in Pb-Pb collisions at sqrt(sNN) = 2.76 TeV
B. Abelev
,
Laurent Aphecetche
(1)
,
A. Baldisseri
(2)
,
Guillaume Batigne
(1)
,
I. Belikov
(3)
,
A.A.E. Bergognon
(1)
,
H. Borel
(2)
,
M. Bregant
(1)
,
J. Castillo Castellanos
(2)
,
J.L. Charvet
(2)
,
B. Cheynis
(4)
,
C. Cheshkov
(4)
,
H. Delagrange
(1)
,
L. Ducroux
(4)
,
Magali Estienne
(1)
,
Marie Germain
(1)
,
C. Geuna
(2)
,
J.-Y. Grossiord
(4)
,
Maxime Guilbaud
(4)
,
B. Hippolyte
(3)
,
C. Kuhn
(3)
,
A. Lardeux
(1)
,
Gines Martinez Garcia
(1)
,
A. Mas
(1)
,
L. Massacrier
(1)
,
L. Molnar
(3)
,
H. Pereira da Costa
(2)
,
Philippe Pillot
(1)
,
A. Rakotozafindrabe
(2)
,
C. Roy
(3)
,
X. Sanchez Castro
(3)
,
Y. Schutz
(1)
,
S. Senyukov
(3)
,
Alexandre Shabetai
(1)
,
Diego Stocco
(1)
,
A. Uras
(4)
,
R. Vernet
(5)
,
Y. Zoccarato
(4)
,
R. Tieulent
(4)
,
N. Arbor
(6)
,
G. Conesa Balbastre
(6)
,
J. Faivre
(6)
,
C. Furget
(6)
,
R. Guernane
(6)
,
S. Kox
(6)
,
J.S. Real
(6)
,
C. Silvestre
(6)
,
Y.W. Baek
(7)
,
V. Barret
(7)
,
N. Bastid
(7)
,
P. Crochet
(7)
,
P. Dupieux
(7)
,
R. Ichou
(7)
,
X. Lopez
(7)
,
F. Manso
(7)
,
M. Marchisone
(7)
,
S. Porteboeuf-Houssais
(7)
,
P. Rosnet
(7)
,
B. Vulpescu
(7)
,
X. Zhang
(7)
,
Z. Conesa Del Valle
(8)
,
I. Das
(8)
,
B. Espagnon
(8)
,
C. Hadjidakis
(8)
,
I. Lakomov
(8)
,
C. Suire
(8)
,
J. D. Tapia Takaki
(8)
,
L. Valencia Palomo
(8)
1
SUBATECH -
Laboratoire SUBATECH Nantes
2 IRFU - Institut de Recherches sur les lois Fondamentales de l'Univers
3 DRS-IPHC - Département Recherches Subatomiques
4 IPNL - Institut de Physique Nucléaire de Lyon
5 CC-IN2P3 - Centre de Calcul de l'IN2P3
6 LPSC - Laboratoire de Physique Subatomique et de Cosmologie
7 LPC - Laboratoire de Physique Corpusculaire - Clermont-Ferrand
8 IPNO - Institut de Physique Nucléaire d'Orsay
2 IRFU - Institut de Recherches sur les lois Fondamentales de l'Univers
3 DRS-IPHC - Département Recherches Subatomiques
4 IPNL - Institut de Physique Nucléaire de Lyon
5 CC-IN2P3 - Centre de Calcul de l'IN2P3
6 LPSC - Laboratoire de Physique Subatomique et de Cosmologie
7 LPC - Laboratoire de Physique Corpusculaire - Clermont-Ferrand
8 IPNO - Institut de Physique Nucléaire d'Orsay
B. Abelev
- Function : Author
Laurent Aphecetche
- Function : Author
- PersonId : 2010
- IdHAL : laurent-aphecetche
- ORCID : 0000-0001-7662-3878
- IdRef : 113847653
Guillaume Batigne
- Function : Author
- PersonId : 175820
- IdHAL : guillaume-batigne
- ORCID : 0000-0001-8638-6300
- IdRef : 077207874
B. Cheynis
- Function : Author
- PersonId : 750577
- IdHAL : brigitte-cheynis
- IdRef : 032215606
Magali Estienne
- Function : Author
- PersonId : 179790
- IdHAL : magali-estienne
- ORCID : 0000-0003-0687-5580
Marie Germain
- Function : Author
- PersonId : 170960
- IdHAL : marie-germain
- ORCID : 0000-0001-7382-1609
- IdRef : 176579958
Maxime Guilbaud
- Function : Author
- PersonId : 177174
- IdHAL : maxime-guilbaud
- ORCID : 0000-0001-5990-482X
- IdRef : 236157566
Gines Martinez Garcia
- Function : Author
- PersonId : 169952
- IdHAL : gines-martinez
- ORCID : 0000-0002-8657-6742
- IdRef : 068952961
Philippe Pillot
- Function : Author
- PersonId : 175815
- IdHAL : ppillot
- ORCID : 0000-0002-9067-0803
C. Roy
- Function : Author
- PersonId : 742351
- IdHAL : christelle-roy
- ORCID : 0000-0001-5920-6271
Alexandre Shabetai
- Function : Author
- PersonId : 181202
- IdHAL : alexandre-shabetai
- ORCID : 0000-0003-3069-726X
Diego Stocco
- Function : Author
- PersonId : 170966
- IdHAL : diego-stocco
- ORCID : 0000-0002-5377-5163
- IdRef : 204479150
G. Conesa Balbastre
- Function : Author
- PersonId : 737477
- IdHAL : conesa-balbastre-gustavo
- ORCID : 0000-0001-5283-3520
J.S. Real
- Function : Author
- PersonId : 737490
- IdHAL : jean-sebastien-real
- ORCID : 0000-0003-1584-783X
- IdRef : 156873133
S. Porteboeuf-Houssais
- Function : Author
- PersonId : 1350722
- IdHAL : sarah-porteboeuf
- ORCID : 0000-0002-2646-6189
Abstract
In this paper measurements are presented of Pi+, Pi-, K+, K-, p and antiproton production at mid-rapidity < 0.5, in Pb-Pb collisions at sqrt(sNN) = 2.76 TeV as a function of centrality. The measurement covers the transverse momentum pt range from 100, 200, 300 MeV/c up to 3, 3, 4.6 GeV/c, for Pi, K, and p respectively. The measured pt distributions and yields are compared to expectations based on hydrodynamic, thermal and recombination models. The spectral shapes of central collisions show a stronger radial flow than measured at lower energies, which can be described in hydrodynamic models. In peripheral collisions, the pt distributions are not well reproduced by hydrodynamic models. Ratios of integrated particle yields are found to be nearly independent of centrality. The yield of protons normalized to pions is a factor ~1.5 lower than the expectation from thermal models.