Relics from the Early Kaluza-Klein Universe
- 1 February 1987
- journal article
- Published by Oxford University Press (OUP) in Progress of Theoretical Physics
- Vol. 77 (2) , 322-331
- https://doi.org/10.1143/ptp.77.322
Abstract
Some models of the Kaluza-Klein theory contain absolutely stable particles with masses of order Planck mass. The Present number density of such particles is severely bounded by the total energy density of the universe. If these particles had existed plentifully in the early universe, most of them should have disappeared through pair annihilations. The annihilation rate depends strongly on the size of the extra space. We investigate the time evolution of the number density of such particles in a 5-dimensional model paying special attention to the time dependence of the size of the extra space.Keywords
This publication has 2 references indexed in Scilit:
- Cosmology Confronts Particle PhysicsAnnual Review of Nuclear and Particle Science, 1979
- Quantentheorie und f nfdimensionale Relativit tstheorieThe European Physical Journal A, 1926