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arXiv 0806.4419hep-ex
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B ~+->phi K_1 ~+-和B ~+->phi K_2 ~*~+-的观测和偏振测量

Observation and Polarization Measurements of B+- ->phi K_1+- and B+- ->phi K_2*+-

The BABAR Collaboration, B. Aubert

摘要:

利用$\babar$的4.65亿BaBar对的完整数据样本,我们观测到了B+- ->phi(1020)K_1(1270)+-和B+- ->phi(1020)K_2*(1430)+-衰变。我们分别测量了(6.1+-1.6+-1.1)\times 10^{-6}和(8.4+-1.9 +-0.9)\times 10^{-6}的分支分数以及0.46(+0.12-0.13)(+0.03-0.07)和0.80(+0.09-0.10)+-0.03的纵向极化分数。我们还报道了(7.0+-1.3+-0.9)\times 10^{-6}的B ~+->phi K_0 ~*(1430)~+衰变分支分数以及对上述三种衰变中的CP破坏和干扰敏感的几个参数。用φ和K_1(1400)+-、K ~*(1410)+-、K_2(1770)+-或K_2(1820)+-对B ~+衰变到终态的速率设置上限。理解所观察到的偏振模式需要来自不确定源的振幅贡献。

英文摘要:

With the full $\babar$ data sample of 465 million BaBar pairs, we observe the decays B+- ->phi(1020) K_1(1270)+- and B+- ->phi(1020) K_2*(1430) +-. We measure the branching fractions (6.1+-1.6+-1.1)\times 10^{-6} and (8.4+- 1.9+- 0.9)\times 10^{-6} and the fractions of longitudinal polarization 0.46(+0.12-0.13)(+0.03-0.07) and 0.80(+0.09-0.10)+-0.03, respectively. We also report on the B+- ->phi K_0*(1430)+- decay branching fraction of (7.0+-1.3+-0.9)\times10^{-6} and several parameters sensitive to CP violation and interference in the above three decays. Upper limits are placed on the B+- decay rates to final states with phi and K_1(1400)+-, K*(1410)+-, K_2(1770)+-,or K_2(1820)+-. Understanding the observed polarization pattern requires amplitude contributions from an uncertain source.

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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