Measurement of {sigma}{sub {chi}{sub c}{sub 2}}B({chi}{sub c2}{yields}J/{psi}{gamma})/{sigma}{sub {chi}{sub c}{sub 1}}B({chi}{sub c}{sub 1}{yields}J/{psi}{gamma}) in pp Collisions at {radical}(s)=1.96 TeV
Journal Article
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· Physical Review Letters
- University of Illinois, Urbana, Illinois 61801 (United States)
- Enrico Fermi Institute, University of Chicago, Chicago, Illinois 60637 (United States)
We measure the ratio of cross section times branching fraction, R{sub p}={sigma}{sub {chi}{sub c}{sub 2}}B({chi}{sub c2}{yields}J/{psi}{gamma})/{sigma}{sub {chi}{sub c}{sub 1}}B({chi}{sub c1}{yields}J/{psi}{gamma}), in 1.1 fb{sup -1} of pp collisions at {radical}(s)=1.96 TeV. This measurement covers the kinematic range p{sub T}(J/{psi})>4.0 GeV/c, vertical bar {eta}(J/{psi})<1.0, and p{sub T}({gamma})>1.0 GeV/c. For events due to prompt processes, we find R{sub p}=0.395{+-}0.016(stat){+-}0.015(syst). This result represents a significant improvement in precision over previous measurements of prompt {chi}{sub c1,2} hadro production.
- OSTI ID:
- 20951460
- Journal Information:
- Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 23 Vol. 98; ISSN 0031-9007; ISSN PRLTAO
- Country of Publication:
- United States
- Language:
- English
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