The time-dependent CP asymmetry in B0 → Kresγ → π+π-Ks0γ decays

被引：0
|
作者：
Akar, S. [1 ,2 ]
Ben-Haim, E. [2 ]
Hebinger, J. [3 ]
Kou, E. [3 ]
Yu, F. -S. [4 ]
机构：
[1] Univ Cincinnati, McMicken Coll Arts & Sci, 2700 Campus Way, Cincinnati, OH 45219 USA
[2] Sorbonne Univ, CNRS, IN2P3, LPNHE,Paris Diderot Sorbonne Paris Cite, 4 Pl Jussieu, F-75005 Paris, France
[3] Univ Paris Sud, Univ Paris Saclay, CNRS, IN2P3,LAL, Rue Ampere,Batiment 200, F-91400 Orsay, France
[4] Lanzhou Univ, Sch Nucl Sci & Technol, South Tianshui Rd 222, Lanzhou 730000, Gansu, Peoples R China
来源：
JOURNAL OF HIGH ENERGY PHYSICS | 2019年 / 09期
基金：
美国国家科学基金会;
关键词：
CP violation; Heavy Quark Physics;
D O I：
10.1007/JHEP09(2019)034
中图分类号：
O412 [相对论、场论]; O572.2 [粒子物理学];
学科分类号：
摘要：
The time-dependent CP asymmetry in B-0 -> K-res gamma -> pi(+)pi K--(S)gamma is sensitive to the photon polarisation in the quark level process b -> s gamma. 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 gamma -> pi(+)pi K--(S)gamma including the most dominant intermediate states. We propose a new observable that could be measured in a time-dependent amplitude analysis of B-0 -> pi(+)pi K--(S)gamma 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.
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页数：25
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