Constraints on the nonuniversal Z′ couplings from B → πK, πK* and ρK Decays

被引：49

作者：

Chang, Qin ^{[1
,2
]}

Li, Xin-Qiang ^{[3
]}

Yang, Ya-Dong ^{[1
]}

机构：

[1] Huazhong Normal Univ, Inst Particle Phys, Wuhan 430079, Hubei, Peoples R China

[2] Henan Normal Univ, Dept Phys, Xinxiang 453007, Henan, Peoples R China

[3] Rhein Westfal TH Aachen, Inst Theoret Phys E, D-52056 Aachen, Germany

来源：

JOURNAL OF HIGH ENERGY PHYSICS | 2009年 / 05期

关键词：

Rare Decays; Beyond Standard Model; B-Physics; CP violation; QCD FACTORIZATION; CP-VIOLATION; DISTRIBUTION AMPLITUDES; INFRARED BEHAVIOR; SYMMETRY-BREAKING; STRONG PHASES; ASYMMETRIES; PUZZLE; PROPAGATORS; FORMULA;

D O I：

10.1088/1126-6708/2009/05/056

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：

Motivated by the large difference between the direct CP asymmetries A(CP)(B- -> pi K-0(-)) and A(CP) ((B) over bar (0) -> pi K-+(-)), we combine the up-to-date experimental information on B -> pi K, pi K* and rho K decays to pursue possible solutions with the nonuniversal Z' model. Detailed analyses of the relative impacts of different types of couplings are presented in four specific cases. Numerically, we find that the new coupling parameters, xi(LL) and xi(LR) with a common nontrivial new weak phase phi(L) similar to -86 degrees, which are relevant to the Z' contributions to the electroweak penguin sector Delta C-9 and Delta C-7, are crucial to the observed "pi K puzzle". Furthermore, they are found to be definitely unequal and opposite in sign. We also find that A(CP)(B- -> rho(0) K-) can put a strong constraint on the new Z' couplings, which implies the Z' contributions to the coefficient of QCD penguins operator O-3 involving the parameter zeta(LL) required.

引用

页数：24

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