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# Nuclear effects on the transverse momentum spectra of charged particles in pPb collisions at √sNN =5.02TeV

The CMS Collaboration (2015) Nuclear effects on the transverse momentum spectra of charged particles in pPb collisions at √sNN =5.02TeV. The European Physical Journal C, C75 (5), 237.

Record type: Article

## Abstract

Transverse momentum spectra of charged particles are measured by the CMS experiment at the CERN LHC in pPb collisions at s NN − − − √ =5.02 sNN=5.02 TeV TeV , in the range 0.4<p T <120 0.4<pT<120 GeV/c GeV/c and pseudorapidity |η CM |<1.8 |ηCM|<1.8 in the proton–nucleon center-of-mass frame. For p T <10 pT<10 GeV/c GeV/c , the charged-particle production is asymmetric about η CM =0 ηCM=0 , with smaller yield observed in the direction of the proton beam, qualitatively consistent with expectations from shadowing in nuclear parton distribution functions (nPDF). A pp reference spectrum at s √ =5.02 s=5.02 TeV TeV is obtained by interpolation from previous measurements at higher and lower center-of-mass energies. The p T pT distribution measured in pPb collisions shows an enhancement of charged particles with p T >20 pT>20 GeV/c GeV/c compared to expectations from the pp reference. The enhancement is larger than predicted by perturbative quantum chromodynamics calculations that include antishadowing modifications of nPDFs.

Published date: 2015
Organisations: Physics & Astronomy

## Identifiers

Local EPrints ID: 411046
URI: http://eprints.soton.ac.uk/id/eprint/411046
ISSN: 1434-6044
PURE UUID: 57ec9a9e-845a-4aef-bde9-de637a277e7b
ORCID for Alexander Belyaev: orcid.org/0000-0002-1733-4408

## Catalogue record

Date deposited: 13 Jun 2017 16:32

## Contributors

Author: Vardan Khachatryan
Corporate Author: The CMS Collaboration