WIMP miracle of the second kind

WIMP miracle of the second kind We study dark matter production in scenarios where a scale invariant hidden sector interacts with the Standard Model degrees of freedom via a Higgs portal λΦ†Φs2. If the hidden sector is very weakly coupled to the SM but exhibits strong interactions within its own particle species, the dark matter abundance may arise as a result of a dark freeze-out occurring in the hidden sector. Because of scale invariance, the free parameters in the hidden sector are determined, and the dark matter candidate exhibits a “WIMP miracle of the second kind.” Demonstrating the predictive power of scale invariance, we carry out a thorough analysis of dark matter production in several benchmark scenarios where the hidden sector contains either a scalar, fermion (sterile neutrino), or vector dark matter and discuss the observational consequences of these scenarios. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Physical Review D American Physical Society (APS)

WIMP miracle of the second kind

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WIMP miracle of the second kind

Abstract

We study dark matter production in scenarios where a scale invariant hidden sector interacts with the Standard Model degrees of freedom via a Higgs portal λΦ†Φs2. If the hidden sector is very weakly coupled to the SM but exhibits strong interactions within its own particle species, the dark matter abundance may arise as a result of a dark freeze-out occurring in the hidden sector. Because of scale invariance, the free parameters in the hidden sector are determined, and the dark matter candidate exhibits a “WIMP miracle of the second kind.” Demonstrating the predictive power of scale invariance, we carry out a thorough analysis of dark matter production in several benchmark scenarios where the hidden sector contains either a scalar, fermion (sterile neutrino), or vector dark matter and discuss the observational consequences of these scenarios.
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Publisher
The American Physical Society
Copyright
Copyright © © 2017 American Physical Society
ISSN
1550-7998
eISSN
1550-2368
D.O.I.
10.1103/PhysRevD.96.023001
Publisher site
See Article on Publisher Site

Abstract

We study dark matter production in scenarios where a scale invariant hidden sector interacts with the Standard Model degrees of freedom via a Higgs portal λΦ†Φs2. If the hidden sector is very weakly coupled to the SM but exhibits strong interactions within its own particle species, the dark matter abundance may arise as a result of a dark freeze-out occurring in the hidden sector. Because of scale invariance, the free parameters in the hidden sector are determined, and the dark matter candidate exhibits a “WIMP miracle of the second kind.” Demonstrating the predictive power of scale invariance, we carry out a thorough analysis of dark matter production in several benchmark scenarios where the hidden sector contains either a scalar, fermion (sterile neutrino), or vector dark matter and discuss the observational consequences of these scenarios.

Journal

Physical Review DAmerican Physical Society (APS)

Published: Jul 15, 2017

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