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

Measurement of the inelastic cross section in proton–lead collisions at $sqrt s_NN=$ 5.02 TeV
Measurement of the inelastic cross section in proton–lead collisions at $sqrt s_NN=$ 5.02 TeV
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.
0370-2693
641-662
Khachatryan, Vardan
375bcfe5-df1a-41ad-9a90-553e557ef6d6
Belyaev, Alexander
6bdb9638-5ff9-4b65-a8f2-34bae3ac34b3
The CMS Collaboration
Khachatryan, Vardan
375bcfe5-df1a-41ad-9a90-553e557ef6d6
Belyaev, Alexander
6bdb9638-5ff9-4b65-a8f2-34bae3ac34b3

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. (doi:10.1016/j.physletb.2016.06.027).

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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More information

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
PURE UUID: d4afba83-8aae-419c-ad2d-4a677297d8cb
ORCID for Alexander Belyaev: ORCID iD orcid.org/0000-0002-1733-4408

Catalogue record

Date deposited: 18 May 2017 04:02
Last modified: 26 Nov 2021 02:52

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Contributors

Author: Vardan Khachatryan
Corporate Author: The CMS Collaboration

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