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Sequestered dark matter

B.v. Harling and A. Hebecker

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We show that hidden-sector dark matter is a generic feature of the type IIB string theory landscape and that its lifetime may allow for a discovery through the observation of very energetic γ-rays produced in the decay. Throats or, equivalently, conformally sequestered hidden sectors are common in flux compactifications and the energy deposited in these sectors can be calculated if the reheating temperature of the standard model sector is known. Assuming that throats with various warp factors are available in the compact manifold, we determine which throats maximize the late-time abundance of sequestered dark matter. For such throats, this abundance agrees with cosmological data if the standard model reheating temperature was 1010−1011 GeV. In two distinct scenarios, the mass of dark matter particles, i.e. the IR scale of the throat, is either around 105 GeV or around 1010 GeV. The lifetime and the decay channels of our dark matter candidates depend crucially on the fact that the Klebanov-Strassler throat is supersymmetric. Furthermore, the details of supersymmetry breaking both in the throat and in the visible sector play an essential role. We identify a number of scenarios where this type of dark matter can be discovered via γ-ray observations.

Keywords

Flux compactifications

Cosmology of Theories beyond the SM

Gauge-gravity correspondence

 

E-print Number: 0801.4015

Cited: by |

Refers: to

PACS

95.35.+d Dark matter (stellar, interstellar, galactic, and cosmological)

11.25.Mj Compactification and four-dimensional models

98.80.Cq Particle-theory and field-theory models of the early Universe (including cosmic pancakes, cosmic strings, chaotic phenomena, inflationary universe, etc.)

95.85.Pw &ggr;-ray

Subjects

Gravitation and cosmology

Particle physics and field theory

Astrophysics and astroparticles

Dates

Issue 05 (May 2008)

Received 11 February 2008, accepted for publication 28 April 2008

Published 9 May 2008



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