Flavor violating Higgs decays

被引：260

作者：

Harnik, Roni ^{[1
]}

Kopp, Joachim ^{[1
,2
]}

Zupan, Jure ^{[3
]}

机构：

[1] Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA

[2] Max Planck Inst Nucl Phys, D-69029 Heidelberg, Germany

[3] Univ Cincinnati, Dept Phys, Cincinnati, OH 45221 USA

来源：

JOURNAL OF HIGH ENERGY PHYSICS | 2013年 / 03期

基金：

美国国家科学基金会;

关键词：

Higgs Physics; Rare Decays; Beyond Standard Model; SEARCH; NONCONSERVATION; MUONIUM;

D O I：

10.1007/JHEP03(2013)026

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 study a class of nonstandard interactions of the newly discovered 125 GeV Higgs-like resonance that are especially interesting probes of new physics: flavor violating Higgs couplings to leptons and quarks. These interaction can arise in many frameworks of new physics at the electroweak scale such as two Higgs doublet models, extra dimensions, or models of compositeness. We rederive constraints on flavor violating Higgs couplings using data on rare decays, electric and magnetic dipole moments, and meson oscillations. We confirm that flavor violating Higgs boson decays to leptons can be sizeable with, e. g., h -> tau mu and h -> tau e branching ratios of O(10%) perfectly allowed by low energy constraints. We estimate the current LHC limits on h -> tau mu and h -> tau e decays by recasting existing searches for the SM Higgs in the tau tau channel and find that these bounds are already stronger than those from rare tau decays. We also show that these limits can be improved significantly with dedicated searches and we outline a possible search strategy. Flavor violating Higgs decays therefore present an opportunity for discovery of new physics which in some cases may be easier to access experimentally than flavor conserving deviations from the Standard Model Higgs framework.

引用

页数：34

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