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# Measurement of the inelastic cross section in proton–lead collisions at $sqrt s_NN=$ 5.02 TeV

The CMS Collaboration (2016) Measurement of the inelastic cross section in proton–lead collisions at $sqrt s_NN=$ 5.02 TeV. Physics Letters B, B759, 641-662.

Record type: Article

## Abstract

The inelastic hadronic cross section in proton–lead collisions at a centre-of-mass energy per nucleon pair of 5.02 TeV is measured with the CMS detector at the LHC. The data sample, corresponding to an integrated luminosity of L=12.6±0.4 nb−1L=12.6±0.4 nb−1, has been collected with an unbiased trigger for inclusive particle production. The cross section is obtained from the measured number of proton–lead collisions with hadronic activity produced in the pseudorapidity ranges 3<η<53<η<5 and/or −5<η<−3−5<η<−3, corrected for photon-induced contributions, experimental acceptance, and other instrumental effects. The inelastic cross section is measured to be σinel(pPb)=2061±3(stat)±34(syst)±72(lumi) mbσinel(pPb)=2061±3(stat)±34(syst)±72(lumi) mb. Various Monte Carlo generators, commonly used in heavy ion and cosmic ray physics, are found to reproduce the data within uncertainties. The value of σinel(pPb)σinel(pPb) is compatible with that expected from the proton–proton cross section at 5.02 TeV scaled up within a simple Glauber approach to account for multiple scatterings in the lead nucleus, indicating that further net nuclear corrections are small.

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S0370269316302805-main - Version of Record

Accepted/In Press date: 12 June 2016
e-pub ahead of print date: 16 June 2016
Organisations: Physics & Astronomy

## Identifiers

Local EPrints ID: 408254
URI: http://eprints.soton.ac.uk/id/eprint/408254
ISSN: 0370-2693
ORCID for Alexander Belyaev: orcid.org/0000-0002-1733-4408

## Catalogue record

Date deposited: 18 May 2017 04:02

## Contributors

Author: Vardan Khachatryan
Corporate Author: The CMS Collaboration

## University divisions

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