Published July 15, 2007
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Self-interacting dark matter in the solar system
Abstract
Weakly coupled, almost massless, spin 0 particles have been predicted by many extensions of the standard model of particle physics. Recently, the PVLAS group observed a rotation of polarization of electromagnetic waves in vacuum in the presence of transverse magnetic field. This phenomenon is best explained by the existence of a weakly coupled light pseudoscalar particle. However, the coupling required by this experiment is much larger than the conventional astrophysical limits. Here we consider a hypothetical self-interacting pseudoscalar particle which couples weakly with visible matter. Assuming that these pseudoscalars pervade the galaxy, we show that the solar limits on the pseudoscalar-photon coupling can be evaded.
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©2007 The American Physical Society (Received 17 October 2006; revised 8 May 2007; published 24 July 2007)Files
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- Eprint ID
- 8486
- Resolver ID
- CaltechAUTHORS:GANprd07
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2007-08-15Created from EPrint's datestamp field
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2021-11-08Created from EPrint's last_modified field