Angular analysis of charged and neutral B ? Kµ + µ - decays
Angular analysis of charged and neutral B ? Kµ + µ - decays
复制标题
带电和中性 B 的角度分析 ?
DOI：
10.1007/jhep05(2014)082
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发表时间：
2014
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
利用LHCb探测器在7 TeV和8 TeV质量中心能量的质子-质子碰撞中收集到的积分光度为3fb−1的数据，研究了稀有衰变B+→K+ μ+ μ−和的角分布。角分布由两个参数描述，即F H和量子系统A FB的前后不对称性，这两个参数是在量子质量平方的容器中确定的。参数fh是（伪）标量和张量振幅对衰减宽度的贡献的度量。这里报告的A - FB和F - H的测量结果是迄今为止最精确的，并且与标准模型的预测相一致。
The angular distributions of the rare decays B+→ K+ μ+ μ− andare studied with data corresponding to 3fb− 1 of integrated luminosity, collected in proton-proton collisions at 7 and 8 TeV centre-of-mass energies with the LHCb detector. The angular distribution is described by two parameters, F H and the forward-backward asymmetry of the dimuon system A FB, which are determined in bins of the dimuon mass squared. The parameter F H is a measure of the contribution from (pseudo) scalar and tensor amplitudes to the decay width. The measurements of A FB and F H reported here are the most precise to date and are compatible with predictions from the Standard Model.