The fermionic dark matter Higgs portal: an effective field theory approach

被引：65

作者：

Fedderke, Michael A. ^{[1
]}

Chen, Jing-Yuan

Kolb, Edward W.

Wang, Lian-Tao

机构：

[1] Univ Chicago, Enrico Fermi Inst, Chicago, IL 60637 USA

来源：

JOURNAL OF HIGH ENERGY PHYSICS | 2014年 / 08期

关键词：

Higgs Physics; Cosmology of Theories beyond the SM; ANOMALOUS DIMENSION; QUARK MASS; LHC; SEARCHES; MODEL;

D O I：

10.1007/JHEP08(2014)122

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 fermionic (Dirac or Majorana) cold thermal relic dark-matter coupling to standard-model particles through the effective dimension-5 Higgs portal operators Lambda(-1) O-DM center dot (HH)-H-dagger, where O-DM is an admixture of scalar (chi) over bar chi and pseudoscalar (chi) over bari gamma 5 chi DM operators. Utilizing the relic abundance requirement to fix the couplings, we consider direct detection and invisible Higgs width constraints, and map out the remaining allowed parameter space of dark-matter mass and the admixture of scalar and pseudoscalar couplings. We emphasize a subtlety which has not previously been carefully studied in the context of the EFT approach, in which an effect arising due to electroweak symmetry breaking can cause a naively pure pseudoscalar coupling to induce a scalar coupling at higher order, which has important implications for direct detection bounds. We provide some comments on indirect detection bounds and collider searches.

引用

页数：23

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