CP asymmetries in singly-Cabibbo-suppressed D decays to two pseudoscalar mesons

被引：104
|
作者：
Bhattacharya, Bhubanjyoti [1 ]
Gronau, Michael [2 ]
Rosner, Jonathan L. [3 ,4 ]
机构：
[1] Univ Montreal, Montreal, PQ H3C 3J7, Canada
[2] Technion Israel Inst Technol, Dept Phys, IL-3200 Haifa, Israel
[3] Univ Chicago, Enrico Fermi Inst, Chicago, IL 60637 USA
[4] Univ Chicago, Dept Phys, Chicago, IL 60637 USA
来源：
PHYSICAL REVIEW D | 2012年 / 85卷 / 05期
基金：
美国能源部;
关键词：
D O I：
10.1103/PhysRevD.85.054014
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
The LHCb Collaboration has recently reported evidence for a CP asymmetry approaching the percent level in the difference between D-0 -> pi(+) pi(-) and D-0 -> K+ K-. We analyze this effect as if it is due to a penguin amplitude with the weak phase of the standard model c -> b -> u loop diagram, but with a CP-conserving enhancement as if due to the strong interactions. In such a case the magnitude and strong phase of this amplitude P-b are correlated in order to fit the observed CP asymmetry, and one may predict CP asymmetries for a number of other singly-Cabibbo-suppressed decays of charmed mesons to a pair of pseudoscalar mesons. Nonzero CP asymmetries are expected for D+ -> K+(K) over bar (0)( the most promising channel for which a nonzero CP asymmetry has not yet been reported), as well as D-0 -> pi(0) pi(0), D-s(+) -> pi(+) K-0 and D-s -> pi(0) K+. No CP asymmetry is predicted for D+ -> pi(+) pi(0) or D-0 -> K-0(K) over bar (0) in this framework.
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页数：9
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