Cosmological heavy-neutrino problem
Abstract
A new method of deriving the Lee-Weinberg equation is presented. This method makes the approximations clear and suggest how they can be improved. A nearly exact formula for the number of heavy neutrinos left over after the annihilation process is given.
- Publication:
-
Physical Review D
- Pub Date:
- December 1985
- DOI:
- 10.1103/PhysRevD.32.3261
- Bibcode:
- 1985PhRvD..32.3261B
- Keywords:
-
- 98.80.Dr;
- 14.60.Gh;
- 95.30.Cq;
- Elementary particle processes