Matter-antimatter hydrodynamics - Computation of the annihilation rate

Details Matter-antimatter hydrodynamics - Computation of the annihilation rate Matter-antimatter hydrodynamics - Computation of the annihilation rate

Jul 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978a%26a....67..199a&link_type=abstract

Astronomy and Astrophysics, vol. 67, no. 2, July 1978, p. 199-208.

Physics

6

Annihilation Reactions, Antimatter, Big Bang Cosmology, Matter (Physics), Antiparticles, Intergalactic Media, Interplanetary Magnetic Fields, Magnetohydrodynamic Flow, Particles, Photons, Thermal Radiation

Scientific paper

This paper is devoted to the computation of the particle-antiparticle annihilation rate at the boundary between two regions of space filled, respectively, by matter and antimatter. A general analysis of the problem is done, and a simple model useful for computing this important quantity in all situations encountered in cosmological studies is established. The annihilation rate is computed analytically in three specific situations: (1) in a matter-antimatter emulsion filling the universe in the radiative and plasma eras of the big bang; (2) in a situation where there is a strong magnetic field; and (3) at the boundary between a hot intergalactic medium and an antimedium.

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