Search for the Higgs portal to a singlet fermionic dark matter at the LHC

被引：143

作者：

Baek, Seungwon ^{[1
]}

Ko, P. ^{[1
]}

Park, Wan-Il ^{[1
]}

机构：

[1] KIAS, Sch Phys, Seoul 130722, South Korea

来源：

JOURNAL OF HIGH ENERGY PHYSICS | 2012年 / 02期

基金：

新加坡国家研究基金会;

关键词：

Higgs Physics; Beyond Standard Model; ELECTROWEAK SYMMETRY-BREAKING; BOSON; MODEL;

D O I：

10.1007/JHEP02(2012)047

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 consider a simple extension of the standard model with a singlet fermionic dark matter. Its thermal relic density can be easily accommodated by a real Singlet scalar messenger that mixes with the standard model Higgs boson. The model can change significantly the Higgs signals at the LTIC via sizable invisible decays of two Higgs-like scalar bosons. After imposing the constraints from the electroweak precision tests, colliders and dark matter search experiments, one concludes that two or one or none of the two Higgs bosons, depending on the mass relations among two scalar bosons and the dark matter fermion and their couplings. In particular, if a standard model Higgs-like scalar boson is discovered around 120-125 GeV region at the LHC, it would be almost impossible to find the second Higgs-like boson since it is mostly a singlet scalar, whether it is heavier or lighter. This model can be further tested by direct dark matter search experiments.

引用

页数：25

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