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Title of Journal: J High Energ Phys

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Abbravation: Journal of High Energy Physics

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Springer Berlin Heidelberg

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DOI

10.1016/0006-8993(76)90208-0

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1029-8479

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Twocomponent dark matter

Authors: Subhadittya Bhattacharya Aleksandra Drozd Bohdan Grzadkowski Jose Wudka
Publish Date: 2013/10/23
Volume: 2013, Issue: 10, Pages: 158-
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Abstract

We study an extension of the Standard Model SM with two interacting cold Dark Matter DM candidates a neutral Majorana fermion ν and a neutral scalar singlet φ The scalar φ interacts with the SM through the “Higgs portal” coupling while ν at the tree level interacts only with φ through Yukawa interactions The relic abundance of ν and φ is found by solving the Boltzmann equations numerically for the case m ν m φ we also derive a reliable approximate analytical solution Effects of the interaction between the two DM components are discussed A scan over the parameter space is performed to determine the regions consistent with the WMAP data for DM relic abundance and with the XENON100 direct detection limits for the DMnucleus cross section We find that although a large region of the parameter space is allowed by the WMAP constraints the XENON100 data severely restricts the parameter space Taking into account only amplitudes generated at the tree level one finds three allowed regions for the scalar mass m φ ~ 625 GeV corresponding to the vicinity of the Higgs boson resonance responsible for φφ annihilation into SM particles m φ ≃ 130 − 140 GeV and m φ ≳ 3 TeV 1loop induced νnucleon scattering has been also calculated and discussed A possibility of DM direct detection by the CRESTII experiment was consideredThis article is published under an open access license Please check the Copyright Information section for details of this license and what reuse is permitted If your intended use exceeds what is permitted by the license or if you are unable to locate the licence and reuse information please contact the Rights and Permissions team

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