Estimation of the Density of the Self-Interacting Dark-Matter Component within a Clump with Allowance for Recombination


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Abstract

The model of dark matter featuring a component in the form of free particles and antiparticles (a, ā ) possessing self-interaction of the Coulomb type is considered. Darkmattermay form small-scale clumps where the annihilation of particles a and ā is enhanced. This annihilation may lead to observable effects (in cosmic rays, for example) and/or to the destruction of these clumps. However, there is an ambiguity in describing the annihilation (via recombination) of very slow particles, which may include a and ā in clumps. The effect of annihilation (in terms of the residual number of free particles a and ā in clumps) is estimated within two approaches (simplified quantum-mechanical and classical) at chosen parameter values.

About the authors

N. O. Nazarova

National Research Nuclear University MEPhI

Author for correspondence.
Email: nazarova.mephi@gmail.com
Russian Federation, Kashirskoe sh. 31, Moscow, 115409

K. M. Belotsky

National Research Nuclear University MEPhI

Email: nazarova.mephi@gmail.com
Russian Federation, Kashirskoe sh. 31, Moscow, 115409

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