https://doi.org/10.1140/epjc/s10052-012-1936-y
Regular Article - Theoretical Physics
Charged multiplicities in pp and AA collisions at LHC
1
Laboratoire de Physique Théorique (Unité Mixte de Recherche UMR n° 8627—CNRS), Université de Paris XI, Bâtiment 210, 91405, Orsay Cedex, France
2
Departamento de Física de Partículas and IGFAE, Universidad de Santiago de Compostela, 15782, Santiago de Compostela, Spain
* e-mail: elena@fpaxp1.usc.es
Received:
11
November
2011
Revised:
2
March
2012
Published online:
17
March
2012
The mid-rapidity charged particle multiplicities in pp and AA collisions at LHC energies are described in the framework of a generalized eikonal model with shadowing corrections incorporated in AA. We show that the pp data require a Pomeron intercept close to 1.2, higher than the conventional one, close to 1.1. An s
0.11 energy dependence is obtained in the LHC range and beyond. The size and centrality dependence of the AA multiplicity at 
is reproduced and its energy dependence is predicted.
© Springer-Verlag / Società Italiana di Fisica, 2012
