Z′ mediated dark matter models for the Galactic Center gamma-ray excess

被引：62

作者：

Hooper, Dan ^{[1
,2
]}

机构：

[1] Fermilab Natl Accelerator Lab, Ctr Particle Astrophys, POB 500, Batavia, IL 60510 USA

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

来源：

PHYSICAL REVIEW D | 2015年 / 91卷 / 03期

关键词：

EMISSION; BREAKING; SEARCH; PROTON; BOSONS;

D O I：

10.1103/PhysRevD.91.035025

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

With the goal of generating the Galactic Center gamma-ray excess, we revisit models in which the dark matter interacts with the Standard Model through the exchange of a new neutral gauge boson, Z'. We find several scenarios that can account for this signal, while respecting all existing constraints from colliders and direct-detection experiments. In such models, the Z' either 1) couples axially to light quarks and is leptophobic, 2) couples dominantly to the third generation, or 3) is near resonance, m(Z') approximate to 2m(DM). We identify an example of an anomaly-free U(1)' that leads to an axial and leptophobic Z'. Many of the models presented here are within the reach of near-future direct-detection experiments, such as LUX and XENON1T.

引用

页数：13

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