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

被引：106

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.

引用

页数：9

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