skip to main content

DOE PAGESDOE PAGES

Title: Light higgsino dark matter from non-thermal cosmology

We study the scenario of higgsino dark matter in the context of a non-standard cosmology with a period of matter domination prior to Big Bang nucleosynthesis. Matter domination changes the dark matter relic abundance if it ends via reheating to a temperature below the higgsino thermal freeze-out temperature. We perform a model independent analysis of the higgsino dark matter production in such scenario. We show that light higgsino-type dark matter is possible for reheating temperatures close to 1 GeV. We study the impact of dark matter indirect detection and collider physics in this context. We show that Fermi-LAT data rule out non-thermal higgsinos with masses below 300 GeV. A future indirect dark matter searches from Fermi-LAT and CTA will be able to cover essentially the full parameter space. Contrary to the thermal case, collider signals from a 100 TeV collider could fully test the non-thermal higgsino scenario. In the second part of the paper we discuss the motivation of such non-thermal cosmology from the perspective of string theory with late-time decaying moduli for both KKLT and LVS moduli stabilisation mechanisms. Finally, we describe the impact of embedding higgsino dark matter in these scenarios.
Authors:
 [1] ;  [2] ;  [3] ;  [4] ;  [5]
  1. Intl Centre for Theoretical Physics (ICTP), Trieste (Italy)
  2. Intl Centre for Theoretical Physics (ICTP), Trieste (Italy); Univ. of Bologna (Italy); National Inst. of Nuclear Physics (INFN), Bologna (Italy)
  3. Texas A & M Univ., College Station, TX (United States), Dept. of Physics and Astronomy
  4. Univ. of Bologna (Italy); National Inst. of Nuclear Physics (INFN), Bologna (Italy)
  5. Intl Centre for Theoretical Physics (ICTP), Trieste (Italy); Univ. of Cambridge (United Kingdom)
Publication Date:
Grant/Contract Number:
FG02-13ER42020; SC0010813
Type:
Accepted Manuscript
Journal Name:
Journal of High Energy Physics (Online)
Additional Journal Information:
Journal Name: Journal of High Energy Physics (Online); Journal Volume: 2016; Journal Issue: 11; Journal ID: ISSN 1029-8479
Publisher:
Springer Berlin
Research Org:
Texas A & M Univ., College Station, TX (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; Supersymmetry Phenomenology; Strings and branes phenomenology
OSTI Identifier:
1395342