CP asymmetries in (B)over-bar → (K)over-bar* (→ (K)over-bar π) (l)over-barl and untagged (B)over-bars, Bs → φ (→ K+ K-) (l)over-barl decays at NLO

被引：188

作者：

Bobeth, Christoph ^{[1
]}

Hiller, Gudrun ^{[1
]}

Piranishvili, Giorgi ^{[1
]}

机构：

[1] Tech Univ, Inst Phys, D-44221 Dortmund, Germany

来源：

JOURNAL OF HIGH ENERGY PHYSICS | 2008年 / 07期

关键词：

rare decays; beyond standard model; B-Physics; CP violation;

D O I：

10.1088/1126-6708/2008/07/106

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 decay (B) over bar -> (K) over bar*(-> (K) over bar pi)(l) over barl offers great opportunities to explore the physics at and above the electroweak scale by means of an angular analysis. We investigate the physics potential of the seven CP asymmetries plus the asymmetry in the rate, working at low dilepton mass using QCD factorization at next- to leading order (NLO). The b -> s CP asymmetries are doubly Cabibbo- suppressed less than or similar to 1% in the Standard Model and its extensions where the CKM matrix is the only source of CP violation. Three CP asymmetries are T-odd, and can be O(1) in the presence of non-standard CP violation. The T- even asymmetries can reach O(0.1), limited by the small strong phases in the large recoil region. We furthermore point out an easy way to measure CP phases from time- integrated, untagged (B) over bar (d), B-d -> K*(-> K-0 pi(0))(l) over barl and (B) over bar (s), B-s. phi(-> K+ K-)(l) over barl decays. Analyses of these CP asymmetries can rule out, or further support the minimal description of CP violation through the CKM mechanism. Experimental studies are promising for (super) flavor factories and at hadron colliders.

引用

页数：31

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