# Pseudorapidity density of charged particles in p-Pb collisions at sqrt(sNN) = 5.02 TeV

Abstract : The charged-particle pseudorapidity density measured over 4 units of pseudorapidity in non-single-diffractive (NSD) p-Pb collisions at a centre-of-mass energy per nucleon pair sqrt(sNN) = 5.02 TeV is presented. The average value at midrapidity is measured to be 16.81 \pm 0.71 (syst.), which corresponds to 2.14 \pm 0.17 (syst.) per participating nucleon. This is 16% lower than in NSD pp collisions interpolated to the same collision energy, and 84% higher than in d-Au collisions at sqrt(sNN) = 0.2 TeV. The measured pseudorapidity density in p-Pb collisions is compared to model predictions, and provides new constraints on the description of particle production in high-energy nuclear collisions.
Document type :
Journal articles
Physical Review Letters, American Physical Society, 2013, 110, pp.032301. <10.1103/PhysRevLett.110.032301>

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Contributor : Sylvie Flores <>
Submitted on : Tuesday, October 23, 2012 - 2:23:36 PM
Last modification on : Monday, January 21, 2013 - 7:28:24 AM

### Citation

B. Abelev, L. Aphecetche, A. Baldisseri, Guillaume Batigne, I. Belikov, et al.. Pseudorapidity density of charged particles in p-Pb collisions at sqrt(sNN) = 5.02 TeV. Physical Review Letters, American Physical Society, 2013, 110, pp.032301. <10.1103/PhysRevLett.110.032301>. <in2p3-00744553>

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