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A taste of dark matter [electronic resource] : Flavour constraints on pseudoscalar mediators

Published
Washington, D.C. : United States. Dept. of Energy. Office of Science, 2015.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy
Physical Description
52 pages : digital, PDF file
Additional Creators
SLAC National Accelerator Laboratory, United States. Department of Energy. Office of Science, and United States. Department of Energy. Office of Scientific and Technical Information
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Summary
Dark matter interacting via the exchange of a light pseudoscalar can induce observable signals in indirect detection experiments and experience large self-interactions while evading the strong bounds from direct dark matter searches. The pseudoscalar mediator will however induce flavour-changing interactions in the Standard Model, providing a promising alternative way to test these models. We investigate in detail the constraints arising from rare meson decays and fixed target experiments for different coupling structures between the pseudoscalar and Standard Model fermions. The resulting bounds are highly complementary to the information inferred from the dark matter relic density and the constraints from primordial nucleosynthesis. We discuss the implications of our findings for the dark matter self-interaction cross section and the prospects of probing dark matter coupled to a light pseudoscalar with direct or indirect detection experiments. In particular, we find that a pseudoscalar mediator can only explain the Galactic Centre excess if its mass is above that of the B mesons, and that it is impossible to obtain a sufficiently large direct detection cross section to account for the DAMA modulation.
Report Numbers
E 1.99:1213911
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Note
Published through SciTech Connect.
03/31/2015.
": 1037"
Journal of High Energy Physics (Online) 2015 3 ISSN 1029-8479 AM
Dolan, Matthew J. [Theory Group, SLAC National Accelerator Laboratory, Menlo Park, CA (United States)]; Kahlhoefer, Felix [Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany)]; McCabe, Christopher [Univ. of Amsterdam, Amsterdam (Netherlands)]; Schmidt-Hoberg, Kai [Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany)].
Funding Information
AC03-76SF00515
View MARC record | catkey: 23496233