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Title: Closing in on mass-degenerate dark matter scenarios with antiprotons and direct detection

Abstract

Over the last years both cosmic-ray antiproton measurements and direct dark matter searches have proved particularly effective in constraining the nature of dark matter candidates. The present work focusses on these two types of constraints in a minimal framework which features a Majorana fermion as the dark matter particle and a scalar that mediates the coupling to quarks. Considering a wide range of coupling schemes, we derive antiproton and direct detection constraints using the latest data and paying close attention to astrophysical and nuclear uncertainties. Both signals are strongly enhanced in the presence of degenerate dark matter and scalar masses, but we show that the effect is especially dramatic in direct detection. Accordingly, the latest direct detection limits take the lead over antiprotons. We find that antiproton and direct detection data set stringent lower limits on the mass splitting, reaching 19% at a 300 GeV dark matter mass for a unity coupling. Interestingly, these limits are orthogonal to ongoing collider searches at the Large Hadron Collider, making it feasible to close in on degenerate dark matter scenarios within the next years.

Authors:
 [1]; ; ;  [2]
  1. Deutsches Elektronen-Synchrotron DESY, Notkestraße 85, 22603 Hamburg (Germany)
  2. Physik-Department T30d, Technische Universität München, James-Franck-Straße, 85748 Garching (Germany)
Publication Date:
OSTI Identifier:
22279686
Resource Type:
Journal Article
Journal Name:
Journal of Cosmology and Astroparticle Physics
Additional Journal Information:
Journal Volume: 2012; Journal Issue: 11; Other Information: Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1475-7516
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ANTIPROTONS; ASTROPHYSICS; COSMIC RADIATION; COSMOLOGY; COUPLING; GEV RANGE; MASS; NONLUMINOUS MATTER; QUARKS; SCALARS

Citation Formats

Garny, Mathias, Ibarra, Alejandro, Pato, Miguel, and Vogl, Stefan, E-mail: mathias.garny@desy.de, E-mail: ibarra@tum.de, E-mail: miguel.pato@tum.de, E-mail: stefan.vogl@tum.de. Closing in on mass-degenerate dark matter scenarios with antiprotons and direct detection. United States: N. p., 2012. Web. doi:10.1088/1475-7516/2012/11/017.
Garny, Mathias, Ibarra, Alejandro, Pato, Miguel, & Vogl, Stefan, E-mail: mathias.garny@desy.de, E-mail: ibarra@tum.de, E-mail: miguel.pato@tum.de, E-mail: stefan.vogl@tum.de. Closing in on mass-degenerate dark matter scenarios with antiprotons and direct detection. United States. doi:10.1088/1475-7516/2012/11/017.
Garny, Mathias, Ibarra, Alejandro, Pato, Miguel, and Vogl, Stefan, E-mail: mathias.garny@desy.de, E-mail: ibarra@tum.de, E-mail: miguel.pato@tum.de, E-mail: stefan.vogl@tum.de. Thu . "Closing in on mass-degenerate dark matter scenarios with antiprotons and direct detection". United States. doi:10.1088/1475-7516/2012/11/017.
@article{osti_22279686,
title = {Closing in on mass-degenerate dark matter scenarios with antiprotons and direct detection},
author = {Garny, Mathias and Ibarra, Alejandro and Pato, Miguel and Vogl, Stefan, E-mail: mathias.garny@desy.de, E-mail: ibarra@tum.de, E-mail: miguel.pato@tum.de, E-mail: stefan.vogl@tum.de},
abstractNote = {Over the last years both cosmic-ray antiproton measurements and direct dark matter searches have proved particularly effective in constraining the nature of dark matter candidates. The present work focusses on these two types of constraints in a minimal framework which features a Majorana fermion as the dark matter particle and a scalar that mediates the coupling to quarks. Considering a wide range of coupling schemes, we derive antiproton and direct detection constraints using the latest data and paying close attention to astrophysical and nuclear uncertainties. Both signals are strongly enhanced in the presence of degenerate dark matter and scalar masses, but we show that the effect is especially dramatic in direct detection. Accordingly, the latest direct detection limits take the lead over antiprotons. We find that antiproton and direct detection data set stringent lower limits on the mass splitting, reaching 19% at a 300 GeV dark matter mass for a unity coupling. Interestingly, these limits are orthogonal to ongoing collider searches at the Large Hadron Collider, making it feasible to close in on degenerate dark matter scenarios within the next years.},
doi = {10.1088/1475-7516/2012/11/017},
journal = {Journal of Cosmology and Astroparticle Physics},
issn = {1475-7516},
number = 11,
volume = 2012,
place = {United States},
year = {2012},
month = {11}
}