J/ψ suppression at forward rapidity in Pb-Pb collisions at âs(NN) = 2.76 TeV.
Phys Rev Lett
; 109(7): 072301, 2012 Aug 17.
Article
em En
| MEDLINE
| ID: mdl-23006362
ABSTRACT
The ALICE experiment has measured the inclusive J/ψ production in Pb-Pb collisions at âs(NN) = 2.76 TeV down to zero transverse momentum in the rapidity range 2.5 < y < 4. A suppression of the inclusive J/ψ yield in Pb-Pb is observed with respect to the one measured in pp collisions scaled by the number of binary nucleon-nucleon collisions. The nuclear modification factor, integrated over the 0%-80% most central collisions, is 0.545 ± 0.032(stat) ± 0.083(syst) and does not exhibit a significant dependence on the collision centrality. These features appear significantly different from measurements at lower collision energies. Models including J/ψ production from charm quarks in a deconfined partonic phase can describe our data.
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01-internacional
Base de dados:
MEDLINE
Tipo de estudo:
Prognostic_studies
Idioma:
En
Revista:
Phys Rev Lett
Ano de publicação:
2012
Tipo de documento:
Article
País de afiliação:
Estados Unidos