The CTA aims at the Inert Doublet Model - INSPIRE

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The CTA aims at the Inert Doublet Model

Nov 18, 2015

5 pages

Published in:

JCAP 02 (2016) 038

Published: Feb 16, 2016

e-Print:

1511.05967 [hep-ph]

DOI:

10.1088/1475-7516/2016/02/038

Report number:

CETUP2015-027

View in:

ADS Abstract Service

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Abstract: (IOP)

We show that the Cherenkov Telescope Array (CTA) can realistically challenge the Inert Doublet Model, one of the simplest and best known models of dark matter. Specifically, the CTA may exclude its heavy regime up to dark matter masses of 800 GeV and probe a large fraction of the remaining viable parameter space at even higher masses. Two features of the Inert Doublet Model make it particularly suitable for CTA searches. First, the dark matter mass (in the heavy regime) must be larger than 500 GeV. Second, the dark matter annihilation cross section, σ v, is always larger than the thermal one, reaching values as high as 10(−)(25) cm(3)s(−)(1). This higher value of σv is the result of the unavoidable coannihilation effects that determine the relic density via thermal freeze-out in the early Universe. We find that with 100 hours of Galactic Center exposure, CTA's expected limit widely surpasses, even after the inclusion of systematic errors, current and projected bounds from Fermi-LAT and HESS on this model.

Note:

5 pages, 4 figures. Matches version published in JCAP

dark matter: mass
dark matter: annihilation
cross section: annihilation
freeze-out: thermal
Cherenkov Telescope Array
Higgs particle: doublet: 2
dark matter: relic density
gamma ray: emission
GLAST
HESS

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