Transverse-Momentum and Pseudorapidity Distributions of Charged Hadrons in pp Collisions at [sqrt] s=7 TeV
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Khachatryan-2010-Transverse-Momentum.pdf
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Author(s)
Paus, Christoph M. E.
Zanetti, Marco
Alver, Burak Han
Bauer, Gerry P.
Bendavid, Joshua L.
Busza, Wit
Butz, Erik M.
Cali, Ivan Amos
Chan, M.
D'Enterria, David
Alternative Title
Transverse-Momentum and Pseudorapidity Distributions of Charged Hadrons in pp Collisions at root s=7 TeV
Date Issued
July 2010
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
CMS Collaboration et al. "Transverse-Momentum and Pseudorapidity Distributions of Charged Hadrons in pp Collisions at [sqrt] s=7 TeV." Physical Review Letters, 105, 022002 (2010) © 2010 CERN, for the CMS Collaboration.
Version
Final published version
Abstract
Charged-hadron transverse-momentum and pseudorapidity distributions in proton-proton collisions at [sqrt]s=7 TeV are measured with the inner tracking system of the CMS detector at the LHC. The charged-hadron yield is obtained by counting the number of reconstructed hits, hit pairs, and fully reconstructed charged-particle tracks. The combination of the three methods gives a charged-particle multiplicity per unit of pseudorapidity dNch/dη||η|<0.5=5.78±0.01(stat)±0.23(syst) for non-single-diffractive events, higher than predicted by commonly used models. The relative increase in charged-particle multiplicity from [sqrt]s=0.9 to 7 TeV is [66.1±1.0(stat)±4.2(syst)]%. The mean transverse momentum is measured to be 0.545±0.005(stat)±0.015(syst) GeV/c. The results are compared with similar measurements at lower energies.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Laboratory for Nuclear Science
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DOI of Published Version
https://doi.org/10.1103/PhysRevLett.105.022002
