Confronting Higgcision with electric dipole moments

被引：58
作者：
Cheung, Kingman [1 ,2 ]
Lee, Jae Sik [3 ]
Senaha, Eibun [4 ]
Tseng, Po-Yan [1 ]
机构：
[1] Natl Tsing Hua Univ, Dept Phys, Hsinchu 300, Taiwan
[2] Konkuk Univ, Sch Phys, Div Quantum Phases & Devices, Seoul 143701, South Korea
[3] Chonnam Natl Univ, Dept Phys, Kwangju 500757, South Korea
[4] Nagoya Univ, Dept Phys, Nagoya, Aichi 4648602, Japan
来源：
JOURNAL OF HIGH ENERGY PHYSICS | 2014年 / 06期
基金：
新加坡国家研究基金会;
关键词：
Higgs Physics; CP violation; HIGGS-BOSON; NEUTRON; LIMIT; COUPLINGS; RATIOS; LIGHT; MSSM; LHC;
D O I：
10.1007/JHEP06(2014)149
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：
Current data on the signal strengths and angular spectrum of the 125.5 GeV Higgs boson still allow a CP-mixed state, namely, the pseudoscalar coupling to the top quark can be as sizable as the scalar coupling: C-u(S) approximate to C-u(P) = 1/2 . CP violation can then arise and manifest in sizable electric dipole moments (EDMs). In the framework of two-Higgs-doublet models, we not only update the Higgs precision (Higgcision) study on the couplings with the most updated Higgs signal strength data, but also compute all the Higgs-mediated contributions from the 125.5 GeV Higgs boson to the EDMs, and confront the allowed parameter space against the existing constraints from the EDM measurements of Thallium, neutron, Mercury, and Thorium monoxide. We found that the combined EDM constraints restrict the pseudoscalar coupling to be less than about 10(-2) , unless there are contributions from other Higgs bosons, supersymmetric particles, or other exotic particles that delicately cancel the current Higgs-mediated contributions
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页数：31
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