Y(3S) → π⁰ h_b 和 ψ(2S) → π⁰ h_c 的分支比
高能物理 - 实验
2011-09-14 v2
摘要
利用 CLEO III [CLEO-c] 探测器在 CESR 上采集的对应于 5.88M Y(3S) [25.9M ψ(2S)] 衰变的 e⁺e⁻ 碰撞数据，我们研究了从 Y(3S) [ψ(2S)] 到相应自旋单态 h_{b[c]} 的单 pion 跃迁。仅利用适当选择的跃迁 π⁰ 候选者的动量，我们在 90% 置信水平上得到了上限 B(Y(3S) → π⁰ h_b) < 1.2×10⁻³，并测量了 B(ψ(2S) → π⁰ h_c) = (9.0±1.5±1.3)×10⁻⁴。通过排除非常不对称的 π⁰ → γγ 候选者，增强了信号灵敏度。
引用
@article{arxiv.1106.3558,
title = {Branching fractions for Y(3S) -> pi^0 h_b and psi(2S) -> pi^0 h_c},
author = {CLEO Collaboration and J. Y. Ge and D. H. Miller and I. P. J. Shipsey and B. Xin and G. S. Adams and J. Napolitano and K. M. Ecklund and J. Insler and H. Muramatsu and C. S. Park and L. J. Pearson and E. H. Thorndike and S. Ricciardi and C. Thomas and M. Artuso and S. Blusk and R. Mountain and T. Skwarnicki and S. Stone and L. M. Zhang and G. Bonvicini and D. Cinabro and A. Lincoln and M. J. Smith and P. Zhou and J. Zhu and P. Naik and J. Rademacker and D. M. Asner and K. W. Edwards and K. Randrianarivony and G. Tatishvili and R. A. Briere and H. Vogel and P. U. E. Onyisi and J. L. Rosner and J. P. Alexander and D. G. Cassel and S. Das and R. Ehrlich and L. Gibbons and S. W. Gray and D. L. Hartill and B. K. Heltsley and D. L. Kreinick and V. E. Kuznetsov and J. R. Patterson and D. Peterson and D. Riley and A. Ryd and A. J. Sadoff and X. Shi and W. M. Sun and J. Yelton and P. Rubin and N. Lowrey and S. Mehrabyan and M. Selen and J. Wiss and J. Libby and M. Kornicer and R. E. Mitchell and C. M. Tarbert and D. Besson and T. K. Pedlar and D. Cronin-Hennessy and J. Hietala and S. Dobbs and Z. Metreveli and K. K. Seth and A. Tomaradze and T. Xiao and L. Martin and A. Powell and G. Wilkinson},
journal= {arXiv preprint arXiv:1106.3558},
year = {2011}
}
备注
12 pages 4 figures, version published in Physical Review D