New physics in b → sμ+ μ- after the measurement of RK

被引：122

作者：

Alok, Ashutosh Kumar ^{[1
]}

Bhattacharya, Bhubanjyoti ^{[2
,3
]}

Datta, Alakabha ^{[4
]}

Kumar, Dinesh ^{[5
,6
]}

Kumar, Jacky ^{[7
]}

London, David ^{[8
]}

机构：

[1] Indian Inst Technol Jodhpur, Jodhpur 342011, Rajasthan, India

[2] Lawrence Technol Univ, Dept Nat Sci, Southfield, MI 48075 USA

[3] Wayne State Univ, Dept Phys & Astron, Detroit, MI 48201 USA

[4] Univ Mississippi, Dept Phys & Astron, 108 Lewis Hall, Oxford, MS 38677 USA

[5] Indian Inst Technol, Bombay 400076, Maharashtra, India

[6] Univ Rajasthan, Dept Phys, Jaipur 302004, Rajasthan, India

[7] Tata Inst Fundamental Res, Dept High Energy Phys, Bombay 400005, Maharashtra, India

[8] Univ Montreal, Phys Particules, CP 6128,Succursale Ctr Ville, Montreal, PQ H3C 3J7, Canada

来源：

PHYSICAL REVIEW D | 2017年 / 96卷 / 09期

基金：

加拿大自然科学与工程研究理事会; 美国国家科学基金会;

关键词：

ANGULAR ANALYSIS; DECAY B-0; MODEL;

D O I：

10.1103/PhysRevD.96.095009

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The recent measurement of R-K* is yet another hint of new physics (NP) and supports the idea that it is present in b -> s mu(+) mu(-) decays. We perform a combined model-independent and model-dependent analysis in order to deduce properties of this NP. Like others, we find that the NP must obey one of two scenarios: (I) C-9(mu mu) (NP) < 0 or (II) C-9(mu mu) (NP) = -C-10(mu mu) (NP) < 0. A third scenario, (III) C-9(mu mu) (NP) = -C-9(mu mu) (NP), is rejected largely because it predicts R-K = 1, in disagreement with experiment. The simplest NP models involve the tree-level exchange of a leptoquark (LQ) or a Z' boson. We show that scenario II can arise in LQ or Z' models, but scenario I is only possible with a Z'. Fits to Z' models must take into account the additional constraints from B-s(0)-(B) over bar (0)(s) mixing and neutrino trident production. Although the LQs must be heavy, O( TeV), we find that the Z' can be light, e.g., M-Z' = 10 GeV or 200 MeV.

引用

页数：14

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