Toward (finally!) ruling out Z and Higgs mediated dark matter models

被引：134

作者：

Escudero, Miguel ^{[1
,2
]}

Berlin, Asher ^{[3
]}

Hooper, Dan ^{[2
,4
,5
]}

Lin, Meng-Xiang ^{[4
]}

机构：

[1] CSIC Univ Valencia, Inst Fis Corpuscular IFIC, Apartado Correos 22085, E-46071 Valencia, Spain

[2] Ctr Particle Astrophys, Fermi Natl Accelerator Lab, Batavia, IL 60510 USA

[3] Univ Chicago, Dept Phys, Chicago, IL 60637 USA

[4] Univ Chicago, Dept Astron & Astrophys, Chicago, IL 60637 USA

[5] Univ Chicago, Kavli Inst Cosmol Phys, Chicago, IL 60637 USA

来源：

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS | 2016年 / 12期

基金：

欧盟地平线“2020”; 美国国家科学基金会;

关键词：

dark matter theory; dark matter experiments;

D O I：

10.1088/1475-7516/2016/12/029

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

In recent years, direct detection, indirect detection, and collider experiments have placed increasingly stringent constraints on particle dark matter, exploring much of the parameter space associated with the WIMP paradigm. In this paper, we focus on the subset of WIMP models in which the dark matter annihilates in the early universe through couplings to either the Standard Model Z or the Standard Model Higgs boson. Considering fermionic, scalar, and vector dark matter candidates within a model-independent context, we fi nd that the overwhelming majority of these dark matter candidates are already ruled out by existing experiments. In the case of Z mediated dark matter, the only scenarios that are not currently excluded are those in which the dark matter is a fermion with an axial coupling and with a mass either within a few GeV of the Z resonance (m(D M) similar or equal to m(Z)/2) or greater than 200 GeV, or with a vector coupling and with m(DM) > 6TeV. Several Higgs mediated scenarios are currently viable if the mass of the dark matter is near the Higgs pole (m(DM) similar or equal to m(H) /2). Otherwise, the only scenarios that are not excluded are those in which the dark matter is a scalar (vector) heavier than 400 GeV (1160 GeV) with a Higgs portal coupling, or a fermion with a pseudoscalar (CP violating) coupling to the Standard Model Higgs boson. With the exception of dark matter with a purely pseudoscalar coupling to the Higgs, it is anticipated that planned direct detection experiments will probe nearly the entire range of models considered in this study.

引用

页数：21

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