Constraining penguin contributions and the CKM angle $\gamma$ through $B_d\to\pi^+\pi^-$

Constraining penguin contributions and the CKM angle $\gamma$ through $B_d\to\pi^+\pi^-$
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约束企鹅贡献和 CKM 角度 $gamma$ 到 $B_d opi^ pi^-$

DOI:
10.1007/s100520050005
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发表时间:
2000
期刊:
The European Physical Journal C - Particles and Fields
影响因子:
--
通讯作者:
R. Fleischer
R. Fleischer
中科院分区:
--
文献类型:
--
作者:
R. Fleischer

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衰变和提供了一个有趣的策略,以提取CKM角在“第二代“B-物理实验的LHC时代。可以获得“第一代”实验的变体,如果替换为。我们表明,最近的实验结果CP平均和分支比意味着一个相当有限的范围内相应的企鹅参数,和上限的直接CP asymetriesand。此外,我们指出,有趣的限制,可以得到从CP平均和分支比,如果此外,混合诱导CP破坏前衰变的测量,并通过固定的混合阶段。如果进一步观察到直接CP破坏,则可以提取。
The decaysandprovide an interesting strategy to extract the CKM angleat “second-generation”B-physics experiments of the LHC era. A variant for “first-generation” experiments can be obtained, ifis replaced by. We show that the most recent experimental results for the CP-averagedandbranching ratios imply a rather restricted range for the corresponding penguin parameters, and upper bounds on the direct CP asymmetriesand. Moreover, we point out that interesting constraints oncan be obtained from the CP-averagedandbranching ratios, if in addition mixing-induced CP violation in the former decay is measured, and the–mixing phase is fixed through. An extraction ofbecomes possible, if furthermore direct CP violation inoris observed.