Measurement of σχc2B(χc2 -&gt; J/ψγ)/σχc1B(χc1 -&gt; J/ψγ) in pp Collisions at s√=1.96  TeV

CDF Collaboration

doi:10.1103/PhysRevLett.98.232001

Scientific article

English

Measurement of σ_χc2B(χ_c2 -> J/ψγ)/σχ_c1B(χc1 -> J/ψγ) in pp Collisions at s√=1.96 TeV

ContributorsCDF Collaboration

CollaboratorsCampanelli, Mario; Clark, Allan Geoffrey; Donega, Mauro; Moed, Shulamit; Sfyrla, Anna; Vallecorsa, Sofia; Wu, Xin

Published inPhysical review letters, vol. 98, no. 23, 232001

Publication date2007

Abstract

We measure the ratio of cross section times branching fraction, Rp=σχc2B(χc2→J/ψγ)/σχc1B(χc1→J/ψγ), in 1.1 fb−1 of pp collisions at s√=1.96 TeV. This measurement covers the kinematic range pT(J/ψ)>4.0 GeV/c, |η(J/ψ)<1.0, and pT(γ)>1.0 GeV/c. For events due to prompt processes, we find Rp=0.395±0.016(stat)±0.015(syst). This result represents a significant improvement in precision over previous measurements of prompt χc1,2 hadro production.

Affiliation entities

Faculté des sciences / Section de physique / Département de physique nucléaire et corpusculaire

Citation (ISO format)

CDF Collaboration. Measurement of σ_χc2B(χ_c2 -> J/ψγ)/σχ_c1B(χc1 -> J/ψγ) in pp Collisions at s√=1.96 TeV. In: Physical review letters, 2007, vol. 98, n° 23, p. 232001. doi: 10.1103/PhysRevLett.98.232001

Article (Published version)

Identifiers

PID : unige:38405
DOI : 10.1103/PhysRevLett.98.232001

Additional URL for this publicationhttp://journals.aps.org/prl/abstract/10.1103/PhysRevLett.98.232001

Journal ISSN0031-9007

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Measurement of σχc2B(χc2 -> J/ψγ)/σχc1B(χc1 -> J/ψγ) in pp Collisions at s√=1.96 TeV

Technical informations

Measurement of σ_χc2B(χ_c2 -> J/ψγ)/σχ_c1B(χc1 -> J/ψγ) in pp Collisions at s√=1.96 TeV