Transverse-Momentum and Pseudorapidity Distributions of Charged Hadrons in pp Collisions at [sqrt] s=7 TeV
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; Everaerts, Pieter Bruno Bart; Gomez-Ceballos, Guillelmo; Goncharov, Maxim; Hahn, Kristian Allan; Harris, P.; Kim, Y.; Klute, Markus; Lee, Y. J.; Li, Wei; Loizides, Constantin; Luckey, P. David, Jr.; Ma, Teng; Nahn, Steven; Roland, Christof E.; Roland, Gunther M.; Rudolph, Matthew Scott; Stephans, George S. F.; Sumorok, Konstanty C.; Sung, K.; Wenger, Edward Allen; Wyslouch, Boleslaw; Xie, S,; Yilmaz, Yetkin; Yoon, A. S.; ... Show more Show less
Transverse-Momentum and Pseudorapidity Distributions of Charged Hadrons in pp Collisions at root s=7 TeV
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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.
DepartmentMassachusetts Institute of Technology. Department of Physics; Massachusetts Institute of Technology. Laboratory for Nuclear Science
Physical Review Letters
American Physical Society
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.
Final published version