CONSTRAINTS ON HEAVY NEUTRINO DECAYS IN THE EARLY UNIVERSE

被引：2

作者：

GRANEK, H

MCKELLAR, BHJ

机构：

来源：

INTERNATIONAL JOURNAL OF MODERN PHYSICS A | 1991年 / 6卷 / 14期

关键词：

D O I：

10.1142/S0217751X91001180

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

A numerical model of interactions of photons with the electron-proton plasma in the early universe at temperatures below the electron rest mass is used to constrain the branching ratio for massive neutrinos and photons. The model includes the double Compton process, which was shown49,80 to be more important than bremsstrahlung at the relatively low densities of electrons and protons encountered. A generalised kinetic equation for interactions of electromagnetic radiation with matter in an expanding universe is derived.

引用

页码：2387 / 2425

页数：39