Neutralino with the right cold dark matter abundance in (almost) any supersymmetric model - INSPIRE

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Neutralino with the right cold dark matter abundance in (almost) any supersymmetric model

Graciela B. Gelmini
(
- UCLA
)
,
Paolo Gondolo
(
- Utah U.
)

Feb, 2006

4 pages

Published in:

Phys.Rev.D 74 (2006) 023510

e-Print:

hep-ph/0602230 [hep-ph]

DOI:

10.1103/PhysRevD.74.023510

Report number:

UCLA-06-TEP-07

View in:

ADS Abstract Service

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Abstract:

We consider non-standard cosmological models in which the late decay of a scalar field

\phi

reheats the Universe to a low reheating temperature, between 5 MeV and the standard freeze-out temperature of neutralinos of mass

m_{\chi}

. We point out that in these models all neutralinos with standard density

\Omega_{\rm std} \gtrsim 10^{-5} (100 {\rm GeV}/m_\chi)

can have the density of cold dark matter, provided the right combination of the following two parameters can be achieved in the high energy theory: the reheating temperature, and the ratio of the number of neutralinos produced per

\phi

decay over the

\phi

field mass. We present the ranges of these parameters where a combination of thermal and non-thermal neutralino production leads to the desired density, as functions of

\Omega_{\rm std}

and

m_{\chi}

.

12.60.Jv
14.80.Ly
95.35.+d
98.80.Cq
dark matter: density
neutralino: mass
field theory: scalar
scalar particle: decay
supersymmetry
temperature: reheating

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