The time-dependent CP asymmetry in B0 → Kresγ → π+π−Ks0γ$$ {K}_s^0\gamma $$ decays
The time-dependent CP asymmetry in B0 → Kresγ → π+π−Ks0γ$$ {K}_s^0\gamma $$ decays
复制标题
B0 中随时间变化的 CP 不对称性 – Kresγ – Ï Ï–Ks0γ$$ {K}_s^0gamma $$ 衰减
DOI:
10.1007/jhep09(2019)034
复制
发表时间:
2019
影响因子:
5.4
通讯作者:
Yu, F.-S.
中科院分区:
文献类型:
--
作者:
Akar, S.;Ben-Haim, E.;Hebinger, J.;Kou, E.;Yu, F.-S.
The time-dependent CP asymmetry in B 0→ K res γ→ π+ π− K S γ is sensitive to the photon polarisation in the quark level process b→ sγ. While this polarisation is predominantly left-handed in the standard model, it could be modified by the existence of new physics contributions that may possess different CP properties. In this paper, we derive the CP violation formulae for B 0→ K res γ→ π+ π− K S γ including the most dominant intermediate states. We propose a new observable that could be measured in a time-dependent amplitude analysis of B 0→ π+ π− K S γ decays, providing a stringent contraint on the photon polarisation. We discuss the future prospects for obtaining such constraints from measurements at Belle II and LHCb.