Multi-strange baryon production at mid-rapidity in Pb-Pb collisions at sqrt(s_NN) = 2.76 TeV
B. Abelev
,
Laurent Aphecetche
(1)
,
A. Baldisseri
(2)
,
V. Barret
(3)
,
N. Bastid
(3)
,
Guillaume Batigne
(1)
,
A.A.E. Bergognon
(1)
,
H. Borel
(2)
,
M. Bregant
(1)
,
J. Castillo Castellanos
(2)
,
J.L. Charvet
(2)
,
C. Cheshkov
(4)
,
B. Cheynis
(4)
,
P. Crochet
(3)
,
H. Delagrange
(1)
,
L. Ducroux
(4)
,
P. Dupieux
(3)
,
B. Erazmus
(1)
,
Magali Estienne
(1)
,
Marie Germain
(1)
,
J.-Y. Grossiord
(4)
,
Maxime Guilbaud
(4)
,
B. Hippolyte
(5)
,
C. Kuhn
(5)
,
X. Lopez
(3)
,
F. Manso
(3)
,
Gines Martinez Garcia
(1)
,
J. Martin Blanco
(1)
,
A. Mas
(1)
,
L. Massacrier
(1)
,
L. Molnar
(5)
,
H. Pereira da Costa
(2)
,
Philippe Pillot
(1)
,
S. Porteboeuf-Houssais
(3)
,
A. Rakotozafindrabe
(1)
,
P. Rosnet
(3)
,
C. Roy
(5)
,
X. Sanchez Castro
(5)
,
Y. Schutz
(1)
,
Alexandre Shabetai
(1)
,
Diego Stocco
(1)
,
R. Tieulent
(4)
,
A. Uras
(4)
,
R. Vernet
(6)
,
B. Vulpescu
(3)
,
H. Yang
(2)
,
X. Zhang
(3)
,
Y. Zoccarato
(4)
,
Y.W. Baek
(3)
,
S. Li
(3)
,
M. Marchisone
(3)
,
N. Arbor
(7)
,
G. Conesa Balbastre
(7)
,
J. Faivre
(7)
,
C. Furget
(7)
,
R. Guernane
(7)
,
S. Kox
(7)
,
J.S. Real
(7)
,
C. Silvestre
(7)
,
Z. Conesa Del Valle
(8)
,
I. Das
(8)
,
B. Espagnon
(8)
,
C. Hadjidakis
,
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 LPC - Laboratoire de Physique Corpusculaire - Clermont-Ferrand
4 IPNL - Institut de Physique Nucléaire de Lyon
5 IPHC - Institut Pluridisciplinaire Hubert Curien
6 CC-IN2P3 - Centre de Calcul de l'IN2P3
7 LPSC - Laboratoire de Physique Subatomique et de Cosmologie
8 IPNO - Institut de Physique Nucléaire d'Orsay
2 IRFU - Institut de Recherches sur les lois Fondamentales de l'Univers
3 LPC - Laboratoire de Physique Corpusculaire - Clermont-Ferrand
4 IPNL - Institut de Physique Nucléaire de Lyon
5 IPHC - Institut Pluridisciplinaire Hubert Curien
6 CC-IN2P3 - Centre de Calcul de l'IN2P3
7 LPSC - Laboratoire de Physique Subatomique et de Cosmologie
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
C. Hadjidakis
- Function : Author
Abstract
The ALICE experiment at the LHC has measured the production of {\Xi}- and {\Omega}- baryons and their anti-particles in Pb-Pb collisions at sqrt(s_NN) = 2.76 TeV. The transverse momentum spectra at mid-rapidity (|y| < 0.5) for charged {\Xi} and {\Omega} hyperons have been studied in the range 0.6 < pT < 8.0 GeV/c and 1.2 < pT < 7.0 GeV/c, respectively, and in several centrality intervals (from the most central 0-10% to the most peripheral 60-80% collisions). These spectra have been compared with the predictions of recent hydrodynamic models. In particular, the Krak{ó}w and EPOS models give a satisfactory description of the data, with the latter covering a wider pT range. Mid-rapidity yields, integrated over pT, have been determined. The hyperon-to-pion ratios are similar to those at RHIC: they rise smoothly with centrality up to ~ 150 and saturate thereafter. The enhancements (yields per participant nucleon relative to p-p collisions) increase both with the strangeness content of the baryon and with centrality, but are less pronounced than at lower energies.