| Issue |
Europhys. Lett.
Volume 73, Number 1, January 2006
|
|
|---|---|---|
| Page(s) | 142 - 148 | |
| Section | Geophysics, astronomy, and astrophysics | |
| DOI | https://doi.org/10.1209/epl/i2005-10349-x | |
| Published online | 23 November 2005 | |
Dark matter from the scalar sector of 3-3-1 models without exotic electric charges
1
ICRA-International Center for Relativistic Astrophysics, Dipartimento di Fisica Università di Roma “La Sapienza” - P.le A. Moro 5, 00185 Roma, Italy
2
Università CBM - Via E. Longoni 83, 00155 Roma, Italy
3
Instituto de Física, Universidad de Antioquia - A.A. 1226, Medellín, Colombia
4
Escuela de Física, Universidad Nacional de Colombia A.A. 3840, Medellín, Colombia
Received:
26
August
2005
Accepted:
25
October
2005
It is shown that three 
singlet neutral scalars (two CP-even
and one CP-odd) in the spectrum of models based on the gauge symmetry
, which do not contain exotic
electric charges, are realistic candidates for thermally generated
self-interacting dark matter in the Universe, a type of dark matter
that has been recently proposed in order to overcome some difficulties
of collisionless cold-dark-matter models at the galactic scale. These
candidates arise without introducing a new mass scale in the model
and/or without the need for a discrete symmetry to stabilize them, but
at the expense of tuning several combinations of parameters of the
scalar potential.
PACS: 95.35.+d – Dark matter (stellar, interstellar, galactic and cosmological) / 12.60.Fr – Extensions of the electroweak Higgs sector / 14.80.Cp – Non-standard model Higgs bosons
© EDP Sciences, 2005
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