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arXiv 1001.0702hep-phhep-ex
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B->K π,K* π,ρ K衰变中的CP不对称性

CP Asymmetries in B->K pi, K*pi, rho K Decays

Michael Gronau, Dan Pirjol, Jure Zupan

摘要:

我们表明,树和企鹅振幅的比例在B-> K*pi和B->rho K是两到三倍,比在B-> K pi。这允许在前一过程中的CP不对称性比在B 0-> K+ π-中测量的10%不对称性大得多。我们研究了B-> K pi,K*pi,rho K中速率不对称性的同位旋和规则,估计了来自树和电弱企鹅振幅干扰的小违反。K π不对称求和规则的破坏估计为百分之一到百分之二,并且是负数。K*pi和rho K和规则的违反可以使用风味SU(3)从B->rho pi幅度来估计,而组合K*pi和rho K不对称性的和规则的破坏可以在B 0-> K+ pi-pi 0的Dalitz分析中直接测量。这三个求和规则可以在LHCb和未来的超级风味工厂进行测试,在低能量有效哈密顿量中提供新的Delta S =Delta I=1算子的精确搜索。

英文摘要:

We show that ratios of tree and penguin amplitudes in B-> K*pi and B->rho K are two to three times larger than in B-> K pi. This allows for considerably larger CP asymmetries in the former processes than the 10% asymmetry measured in B0 -> K+pi-. We study isospin sum rules for rate asymmetries in B-> K pi, K*pi, rho K, estimating small violation from interference of tree and electroweak penguin amplitudes. The breaking of the K pi asymmetry sum rule is estimated to be one to two percent and negative. Violation of K*pi and rho K sum rules can be estimated from B->rho pi amplitudes using flavor SU(3), while breaking of a sum rule combining K*pi and rho K asymmetries can be measured directly in a Dalitz analysis of B0-> K+pi-pi0. The three sum rules can be tested at the LHCb and at a future Super Flavor Factory, providing precision searches for new Delta S =Delta I=1 operators in the low energy effective Hamiltonian.

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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