Study of Majorana fermionic dark matter

被引：6

作者：

Chua, Chun-Khiang ^{[1
]}

Wong, Gwo-Guang

机构：

[1] Chung Yuan Christian Univ, Dept Phys, Taoyuan 32023, Taiwan

来源：

PHYSICAL REVIEW D | 2016年 / 94卷 / 03期

关键词：

PROBE WMAP OBSERVATIONS; MODEL; ROTATION; SEARCH; LIMITS;

D O I：

10.1103/PhysRevD.94.035002

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We construct a generic model of Majorana fermionic dark matter (DM). Starting with two Weyl spinor multiplets. eta(1,2) similar to (I, -/+ Y) coupled to the Standard Model Higgs, six additional Weyl spinor multiplets with (I +/- 1/2, +/- (Y +/- 1/2))are needed in general. It has 13 parameters in total, five mass parameters and eight Yukawa couplings. The DM sector of the minimal supersymmetric Standard Model is a special case of the model with (I,Y) = (1/2,1/2). Therefore, this model can be viewed as an extension of the neutralino DM sector. We consider three typical cases: the neutralinolike, the reduced, and the extended cases. For each case, we survey the DM mass m(chi) in the range of (1,2500) GeV by random sampling from the model parameter space and study the constraints from the observed DM relic density; the direct search of LUX, XENON100, and PICO experiments; and the indirect search of Fermi-LAT data. We investigate the interplay of these constraints and the differences among these cases. It is found that the direct detection of spin-independent DM scattering off nuclei and the indirect detection of DM annihilation to the W+W- channel will be more sensitive to the DM searches in the near future. The allowed mass for finding (H) over tilde-, (B) over tilde-, (W) over tilde-, and non-neutralino-like DM particles and the predictions on <sigma(chi chi -> ZZ, ZH, t (t) over bar )v > in the indirect search are given.

引用

页数：51

共 68 条

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