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arXiv 0807.3718hep-ex
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chi_cJ辐射衰变到光矢量介子的观测

Observation of chi_cJ radiative decays to light vector mesons

CLEO Collaboration, J. V. Bennett

摘要:

使用CLEO-c探测器收集的psi(2S)的总共2.74 x 10^7次衰变,我们对chi_cJ -> gamma V进行了研究,其中V = rho^0,omega,phi。在B(chi_c1-> gamma rho^0)=(2.43 +- 0.19 +- 0.22)x 10^-4和B(chi_c1-> gamma omega)=(8.3 +- 1.5 +- 1.2)x 10^-5的情况下观察到了chi_c1-> gamma rho^0和chi_c1-> gamma omega跃迁。在chi_c1 -> gamma ρ ^0跃迁中,末态介子主要是纵向极化的。给出了其它chi_cJ态到轻矢量介子的分支分数的上限。

英文摘要:

Using a total of 2.74 x 10^7 decays of the psi(2S) collected with the CLEO-c detector, we present a study of chi_cJ -> gamma V, where V = rho^0, omega, phi. The transitions chi_c1 -> gamma rho^0 and chi_c1 -> gamma omega are observed with B(chi_c1 -> gamma rho^0) = (2.43 +- 0.19 +- 0.22) x 10^-4 and B(chi_c1 -> gamma omega) = (8.3 +- 1.5 +- 1.2) x 10^-5. In the chi_c1 -> gamma rho^0 transition, the final state meson is dominantly longitudinally polarized. Upper limits on the branching fractions of other chi_cJ states to light vector mesons are presented.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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