B → K(*)ν(ν)over-bar decays in the Standard Model and beyond

被引：0
|
作者：
Buras, Andrzej J. [1 ,2 ]
Girrbach-Noe, Jennifer [1 ,2 ]
Niehoff, Christoph [3 ]
Straub, David M. [3 ]
机构：
[1] TUM Inst Adv Study, Lichtertbergstr 2a, D-85748 Garching, Germany
[2] TUM, Dept Phys, D-85748 Garching, Germany
[3] TUM, Excellence Cluster Univ, D-85748 Garching, Germany
来源：
JOURNAL OF HIGH ENERGY PHYSICS | 2015年 / 02期
关键词：
Rare Decays; Beyond Standard Model; B-Physics; Standard Model; FERMION-PAIR PRODUCTION; QCD CORRECTIONS; PHYSICS; FLAVOR; RARE; SEARCH; SPHENO; SUM;
D O I：
10.1007/JHEP02(2015)184
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：
We present an analysis of the rare exclusive B decays B -> K nu(nu) over bar and B -> K*nu(nu) over bar within the Standard Model (SM), in a model-independent manner, and in a number of new physics (NP) models. Combining new form factor determinations from lattice QCD with light-cone sum rule results and including complete two-loop electroweak corrections to the SM Wilson coefficient, we obtain the SM predictions BR(B+ -> K+nu(nu) over bar) = (4.0 +/- 0.5) x 10-6 and BR(B-0 -> K*0 nu(nu) over bar) = (9.2 +/- 1.0) x 10(-6), more precise and more robust than previous estimates. Beyond the SM, we make use of an effective theory with dimension-six operators invariant under the SM gauge symmetries to relate NP effects in b -> s nu(nu) over bar transitions to b -> sl(+)l(-) transitions and use the wealth of experimental data on B -> K(*)l(+)l(-) and related modes to constrain NP effects in B -> K(*)nu(nu) over bar. We then consider several specific NP models, including Z' models, the MSSM, models with partial compositeness, and leptoquark models, demonstrating that the correlations between b -> s nu(nu) over bar observables among themselves and with B-s -> mu+mu- and b -> sl(+)l(-) transitions offer powerful tests of NP with new right-handed couplings and non-MFV interactions.
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页数：39
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