Global fits to b → sll data and signs for lepton non-universality

被引：91

作者：

Hurth, T. ^{[1
,2
]}

Mahmoudi, F. ^{[3
,4
,5
,6
]}

Neshatpour, S. ^{[7
]}

机构：

[1] Johannes Gutenberg Univ Mainz, PRISMA Cluster Excellence, D-55099 Mainz, Germany

[2] Johannes Gutenberg Univ Mainz, Inst Phys THEP, D-55099 Mainz, Germany

[3] Univ Lyon 1, Ctr Rech Astrophys Lyon, CNRS, UMR 5574, F-69561 St Genis Laval, France

[4] Ecole Normale Super Lyon, F-69364 Lyon, France

[5] CERN, Div Theory, Dept Phys, CH-1211 Geneva 23, Switzerland

[6] Inst Univ France, F-75005 Paris, France

[7] Inst Res Fundamental Sci IPM, Sch Particles & Accelerators, Tehran, Iran

来源：

JOURNAL OF HIGH ENERGY PHYSICS | 2014年 / 12期

关键词：

Rare Decays; Beyond Standard Model; B-Physics; PENGUIN DECAYS; FORM-FACTORS; SEARCH; ELECTROWEAK; OBSERVABLES; ASYMMETRY; VIOLATION; FLAVOR;

D O I：

10.1007/JHEP12(2014)053

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：

There are some slight tensions with the SM predictions within the latest LHCb measurements. Besides the known anomaly in one angular observable of the rare decay B --> K*mu(+)mu(-), another small discrepancy recently occurred. The ratio R-K = BR(B+ --> K+mu(+)mu(-))/BR(B+ --> K(+)e(+)e(-)) in the low-q(2) region has been measured by LHCb showing a 2.6 sigma deviation from the SM prediction. In contrast to the anomaly in the rare decay B --> K*mu(+)mu(-) which is affected by power corrections, the ratio R-K is theoretically rather clean. We analyse all the b --> sll data with global fits and in particular explore the possibility of breaking of lepton universality. Possible cross-checks with an analysis of the inclusive B --> X(s)l(+)l(-) decay are also explored.

引用

页数：18

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