Producing massive sterile neutrinos as warm Dark Matter
Abstract
This paper has been withdrawn by the authors. This paper started with a wrong term describing elastic scattering. The correct form of the kinetic equations for the density matrix are derived e.g. in A. Dolgov, Yad. Fiz. 33 (1981) 1309; K. Enqvist, K. Kainulainen and J. Maalampi, Nucl. Phys. B 349 (1991) 754; G. Sigl and G. Raffelt, Nucl. Phys. B 406 (1993) 423. When using the correct form of the kinetic equations, the result is in good agreement with old results, A. Dolgov and S. Hansen, hep-ph/0009083.
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