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Measurement of σχc2B(χc2→J/ψγ)/ σχc1B(χc1→J/ψγ) in pp̄ Collisions at s=1.96TeV

Abstract:
We measure the ratio of cross section times branching fraction, Rp=σχc2B(χc2→J/ψγ)/σχc1B(χc1→J/ ψγ), in 1.1fb-1 of pp̄ collisions at s=1.96TeV. This measurement covers the kinematic range pT(J/ψ)>4.0GeV/c, η(J/ψ)<1.0, and pT(γ)>1.0GeV/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. © 2007 The American Physical Society.

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Authors


Abulencia, A More by this author
Adelman, J More by this author
Affolder, T More by this author
Akimoto, T More by this author
Albrow, MG More by this author
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Journal:
Physical Review Letters
Volume:
98
Issue:
23
Publication date:
2007-06-06
DOI:
EISSN:
1079-7114
ISSN:
0031-9007
URN:
uuid:2cb8f7ca-2376-472b-b937-70b1a9ae91be
Source identifiers:
117288
Local pid:
pubs:117288
Language:
English

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