期刊
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
卷 -, 期 1, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/1475-7516/2015/01/023
关键词
dark matter theory; dark matter experiments; gamma ray theory
资金
- National Research Foundation of Korea (NRF) Research Grant [2012R1A2A1A01006053]
- NRF grant - Korea government (MSIP) through Korea Neutrino Research Center at Seoul National University [2009-0083526]
- National Research Foundation of Korea [2012R1A2A1A01006053, 2009-0083526, PG021403] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
We show that hidden sector dark matter (DM) models with local dark gauge symmetries make a natural playground for the possible gamma-ray excess from the galactic center (GC). We first discuss in detail the GC gamma-ray excess in a scalar dark matter (DM) model with local Z(3) symmetry which was recently proposed by the present authors. Within this model, scalar DM with mass 30-70 GeV is allowed due to the newly-opened (semi-)annihilation channels of a DM pair into dark Higgs phi and/or dark photon Z' pair, and the gamma-ray spectrum from the GC can be fit within this model. Then we argue that the GC gamma ray excess can be easily accommodated within hidden sector dark matter models where DM is stabilized by local gauge symmetries, due to the presence of dark Higgs (and also dark photon for Abelian dark gauge symmetry).
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