Asymmetric dark matter and the sun

Cold dark matter particles with an intrinsic matter-antimatter asymmetry do not annihilate after gravitational capture by the Sun and can affect its interior structure. The rate of capture is exponentially enhanced when such particles have self-interactions of the right order to explain structure fo...

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Bibliographic Details
Published in:Physical review letters 2010-07, Vol.105 (1), p.011301-011301, Article 011301
Main Authors: Frandsen, Mads T, Sarkar, Subir
Format: Article
Language:English
Subjects:
ABUNDANCE
ANTIMATTER
ASTROPHYSICS, COSMOLOGY AND ASTRONOMY
ASYMMETRY
BARYONS
BASIC INTERACTIONS
CAPTURE
ELECTROMAGNETIC RADIATION
ELEMENTARY PARTICLES
ENERGY RANGE
FERMIONS
GEV RANGE
GRAVITATIONAL INTERACTIONS
HADRONS
INTERACTIONS
LEPTONS
MAIN SEQUENCE STARS
MASSLESS PARTICLES
MATTER
MICROWAVE RADIATION
NEUTRINOS
NONLUMINOUS MATTER
PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
RADIATIONS
RELICT RADIATION
STARS
SUN
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Summary:Cold dark matter particles with an intrinsic matter-antimatter asymmetry do not annihilate after gravitational capture by the Sun and can affect its interior structure. The rate of capture is exponentially enhanced when such particles have self-interactions of the right order to explain structure formation on galactic scales. A "dark baryon" of mass 5 GeV is a natural candidate and has the required relic abundance if its asymmetry is similar to that of ordinary baryons. We show that such particles can solve the "solar composition problem." The predicted small decrease in the low energy neutrino fluxes may be measurable by the Borexino and SNO+ experiments.
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.105.011301