Transverse-Momentum and Pseudorapidity Distributions of Charged Hadrons in pp Collisions at {radical}(s)=7 TeV

Journal Article · Fri Jul 09 00:00:00 EDT 2010 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.105.022002· OSTI ID:21410899

Khachatryan, V ^[1]

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1. Yerevan Physics Institute, Yerevan (Armenia)

Charged-hadron transverse-momentum and pseudorapidity distributions in proton-proton collisions at {radical}(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 dN{sub ch}/d{eta}|{sub |{eta}|<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 {radical}(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.

• OSTI ID: 21410899
• Journal Information: Physical Review Letters, Vol. 105, Issue 2; Other Information: DOI: 10.1103/PhysRevLett.105.022002; (c) 2010 American Institute of Physics; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
CERN LHC
CHARGED PARTICLES
GEV RANGE
HADRONS
MULTIPLICITY
PARTICLE RAPIDITY
PARTICLE TRACKS
PROTON-PROTON INTERACTIONS
TEV RANGE
TRANSVERSE MOMENTUM
YIELDS
ACCELERATORS
BARYON-BARYON INTERACTIONS
CYCLIC ACCELERATORS
ELEMENTARY PARTICLES
ENERGY RANGE
HADRON-HADRON INTERACTIONS
INTERACTIONS
LINEAR MOMENTUM
NUCLEON-NUCLEON INTERACTIONS
PARTICLE INTERACTIONS
PARTICLE PROPERTIES
PROTON-NUCLEON INTERACTIONS
STORAGE RINGS
SYNCHROTRONS