Probing the inert doublet dark matter model with Cherenkov telescopes

被引：58

作者：

Garcia-Cely, Camilo ^{[1
]}

Gustafsson, Michael ^{[2
]}

Ibarra, Alejandro ^{[3
]}

机构：

[1] Univ Libre Bruxelles, Serv Phys Theor, CP225,Bld Triomphe, B-1050 Brussels, Belgium

[2] Univ Gottingen, Inst Theoret Phys, Fac Phys, Friedrich Hund Pl 1, D-37077 Gottingen, Germany

[3] Tech Univ Munich, Phys Dept T30d, James Franck Str, D-85748 Garching, Germany

来源：

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS | 2016年 / 02期

关键词：

dark matter theory; dark matter experiments; gamma ray experiments; gamma ray detectors; GAMMA-RAYS; NEUTRALINO ANNIHILATION; RADIATIVE PROCESSES; SYMMETRY-BREAKING;

D O I：

10.1088/1475-7516/2016/02/043

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present a detailed study of the annihilation signals of the inert dark matter doublet model in its high mass regime. Concretely, we study the prospects to observe gamma-ray signals of the model in current and projected Cherenkov telescopes taking into account the Sommerfeld effect and including the contribution to the spectrum from gamma ray lines as well as from internal bremsstrahlung. We show that present observations of the galactic center by the H.E.S.S. instrument are able to exclude regions of the parameter space that give the correct dark matter relic abundance. In particular, models with the charged and the neutral components of the inert doublet nearly degenerate in mass have strong gamma-ray signals. Furthermore, for dark matter particle masses above 1 TeV, we find that the non-observation of the continuum of photons generated by the hadronization of the annihilation products typically give stronger constraints on the model parameters than the sharp spectral features associated to annihilation into monochromatic photons and the internal bremsstrahlung process. Lastly, we also analyze the interplay between indirect and direct detection searches for this model, concluding that the prospects for the former are more promising. In particular, we find that the upcoming Cherenkov Telescope Array will be able to probe a significant part of the high mass regime of the model.

引用

页数：28

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