Effect of K0 - K0 mixing on CP and CPT violations in B±c→ B±KS,L0 decays

被引：1
作者：
Cheng, Xiao-Dong [1 ]
Wang, Ru-Min [2 ]
Yuan, Xing-Bo [3 ,4 ]
机构：
[1] Xinyang Normal Univ, Coll Phys & Elect Engn, Xinyang 464000, Peoples R China
[2] JiangXi Normal Univ, Coll Phys & Commun Elect, Nanchang 330022, Jiangxi, Peoples R China
[3] Cent China Normal Univ, Inst Particle Phys, MOE, Wuhan 430079, Peoples R China
[4] Cent China Normal Univ, Key Lab Quark & Lepton Phys, MOE, Wuhan 430079, Peoples R China
来源：
PHYSICAL REVIEW D | 2021年 / 104卷 / 09期
基金：
中国国家自然科学基金;
关键词：
WEAK DECAYS; D-MESON; ASYMMETRIES; SYMMETRY; PHYSICS;
D O I：
10.1103/PhysRevD.104.093005
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
The large data sample of the B-c meson collected at the LHC experiment and the HL-LHC experiment provides us the opportunity to study the B-c decays and the related physics. In this paper, we investigate the effect of K-0 - K-0 mixing on the branching ratios, CP violations and CPT violations in the B-c(+/-) -> B-+/- K-S,L(0) decays. We find that some of the B-c(+/-) -> (BKS,L0)-K-+/- f(B +/-)f(KS,L)(0) decay chains have large branching ratios, whose maximum value can exceed the order of 10(-6), the minimum number of B-c(+/-) events times efficiency for observing the decays at three standard deviations (3 sigma) level is about 10(6). We study the CP asymmetries in the B-c(+/-) -> B-+/- K-S,L(0) decays and find that the CP asymmetries can exceed the order of 10(-3), which are dominated by K-0 - K-0 mixing. We give the most promising processes to observe the CP violations and the ranges of the numbers of B-c(+/-) events-times-efficiency needed to observe the CP asymmetries at a significance of 3 sigma in these decays. We investigate the possibility to constraint the CPT violation parameter z in the B-c(+/-)-> B-+/- K(S,L)(0)f(B +/-)f(KS,L)(0) decays and give the most promising processes to constraint the parameter z.
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页数：18
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