Differential branching fraction and angular moments analysis of the decay B 0 ? K +p- µ + µ - in the K 0,2 * (1430)0 region
Differential branching fraction and angular moments analysis of the decay B 0 ? K +p- µ + µ - in the K 0,2 * (1430)0 region
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衰变的微分支化分数和角矩分析 B 0 ?
DOI：
10.1007/jhep12(2016)065
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发表时间：
2016
影响因子：
5.4
通讯作者：
Aaij R
中科院分区：
文献类型：
--
作者：
Aaij R
给出了在 K+ π− 不变质量范围 1330< m (K+ π−)< 1530 MeV/c 2 中微分分支分数和衰变角矩 B 0→ K+ π− μ+ μ− 的测量。使用质子-质子碰撞数据，对应于 LHCb 实验收集的 3 fb−1 积分光度。在 0. 1 和 8. 0 GeV 2/c 4 之间的 dimuon 系统不变质量平方 q 2 的五个箱中报告了微分支化分数测量。首次对这种罕见衰变的 S 波、P 波和 D 波贡献进行了敏感的角度分析。描述衰减的 40 个归一化角矩的集合呈现为 q 2 范围 1. 1-6。 0 GeV 2/c 4。
Measurements of the differential branching fraction and angular moments of the decay B 0→ K+ π− μ+ μ− in the K+ π− invariant mass range 1330< m (K+ π−)< 1530 MeV/c 2 are presented. Proton-proton collision data are used, corresponding to an integrated luminosity of 3 fb− 1 collected by the LHCb experiment. Differential branching fraction measurements are reported in five bins of the invariant mass squared of the dimuon system, q 2, between 0. 1 and 8. 0 GeV 2/c 4. For the first time, an angular analysis sensitive to the S-, P-and D-wave contributions of this rare decay is performed. The set of 40 normalised angular moments describing the decay is presented for the q 2 range 1. 1-6. 0 GeV 2/c 4.