Measurement of the CKM angle ? in B± ? DK± and B± ? Dp± decays with D ? $$ {K}_{\mathrm{S}}^0 $$h+h-
Measurement of the CKM angle ? in B± ? DK± and B± ? Dp± decays with D ? $$ {K}_{\mathrm{S}}^0 $$h+h-
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CKM 角的测量 ?
DOI：
10.1007/jhep02(2021)169
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发表时间：
2021
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
利用衰变B±→ DK±和B±→ Dπ±对CP破坏观测量进行了测量，其中D介子在自共轭三体末态π+ π−和K + K−（通常记为h + h−）中的一个中重构.在D-衰变相空间的仓中分析衰变，导致独立于D-衰变振幅的建模的测量。观测量用CKM角γ表示。使用LHCb实验中在质心能量为7、8和13 TeV的质子-质子碰撞中收集的对应于9 fb− 1的积分光度的数据样本，γ被测量为。本文还报道了被抑制和被促进的B ~+衰变的比率和强相位差等强子参数。
A measurement of CP-violating observables is performed using the decays B±→ DK±and B±→ Dπ±, where the D meson is reconstructed in one of the self-conjugate three-body final statesπ+ π− andK+ K−(commonly denotedh+ h−). The decays are analysed in bins of the D-decay phase space, leading to a measurement that is independent of the modelling of the D-decay amplitude. The observables are inter-preted in terms of the CKM angle γ. Using a data sample corresponding to an integrated luminosity of 9 fb− 1 collected in proton-proton collisions at centre-of mass energies of 7, 8, and 13 TeV with the LHCb experiment, γ is measured to be. The hadronic parameters, which are the ratios and strong-phase differences of the suppressed and favoured B±decays, are also reported.