The University of Southampton
University of Southampton Institutional Repository
 ePrints Soton is experiencing an issue with some file downloads not being available. We are working hard to fix this. Please bear with us.

# Charged particle multiplicities in $pp$ interactions at $s=0.9$, 2.36, and 7 TeV

The CMS Collaboration (2011) Charged particle multiplicities in $pp$ interactions at $s=0.9$, 2.36, and 7 TeV. Journal of High Energy Physics, 2011, [079].

Record type: Article

## Abstract

Measurements of primary charged hadron multiplicity distributions are presented for non-single-diffractive events in proton-proton collisions at centre-of-mass energies of s √ =0.9 s=0.9, 2.36, and 7 TeV, in five pseudorapidity ranges from |η| < 0.5 to |η| < 2.4. The data were collected with the minimum-bias trigger of the CMS experiment during the LHC commissioning runs in 2009 and the 7 TeV run in 2010. The multiplicity distribution at s √ =0.9TeV s=0.9TeV is in agreement with previous measurements. At higher energies the increase of the mean multiplicity with s √ s is underestimated by most event generators. The average transverse momentum as a function of the multiplicity is also presented. The measurement of higher-order moments of the multiplicity distribution confirms the violation of Koba-Nielsen-Olesen scaling that has been observed at lower energies.

Published date: 2011
Organisations: Physics & Astronomy

## Identifiers

Local EPrints ID: 411295
URI: http://eprints.soton.ac.uk/id/eprint/411295
PURE UUID: 1950089c-5f3d-4d99-885c-7ea02744ff84
ORCID for Alexander Belyaev: orcid.org/0000-0002-1733-4408

## Catalogue record

Date deposited: 16 Jun 2017 16:32

## Contributors

Author: Vardan Khachatryan
Corporate Author: The CMS Collaboration