Gluon saturation and energy dependence of hadron multiplicity in pp and AA collisions at the LHC

Eugene Levin*, Amir H. Rezaeian

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

65 Scopus citations

Abstract

The recent results in √s=2.76TeV Pb+Pb collisions at the Large Hadron Collider (LHC) reported by the ALICE collaboration shows that the power-law energy-dependence of charged hadron multiplicity in Pb+Pb collisions is significantly different from p+p collisions. We show that this different energy-dependence can be explained by inclusion of a strong angular-ordering in the gluon-decay cascade within the color glass condensate (or gluon saturation) approach. This effect is more important in nucleus-nucleus collisions where the saturation scale is larger than 1 GeV. Our prescription gives a good description of the LHC data both in p+p and Pb+Pb collisions.

Original languageEnglish
Article number114001
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume83
Issue number11
DOIs
StatePublished - 1 Jun 2011

Fingerprint

Dive into the research topics of 'Gluon saturation and energy dependence of hadron multiplicity in pp and AA collisions at the LHC'. Together they form a unique fingerprint.

Cite this