Ratio of Branching Fractions for $χ_{cJ} \to γJ/ψ$

Details Ratio of Branching Fractions for $χ_{cJ} \to γJ/ψ$ Ratio of Branching Fractions for $χ_{cJ} \to γJ/ψ$

2006-08-24

arxiv.org/abs/hep-ex/0608056v1

Physics

High Energy Physics

High Energy Physics - Experiment

3 pages, including title page; no figures

Scientific paper

One important quarkonia result from the Tevatron experiments is the ratio of direct inclusive production of \chi_{c1} to \chi_{c2}, which is most readily measured using \chi_{cJ}\to\gamma J/\psi decays. This note uses CLEO publications to obtain a ratio of these radiative branching fractions, {\cal B}(\chi_{c1}\to\gamma J/\psi)/{\cal B}(\chi_{c2}\to\gamma J/\psi) = 1.91 \pm 0.10, using cancelation in systematic uncertainties not available in the Particle Data Group listings.

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