FINITE-TEMPERATURE RADIATIVE-CORRECTIONS TO EARLY UNIVERSE NEUTRON PROTON RATIO - CANCELLATION OF INFRARED AND MASS SINGULARITIES

被引：24

作者：

BAIER, R

PILON, E

PIRE, B

SCHIFF, D

机构：

[1] UNIV PARIS 11,CNRS,PHYS THEOR & HAUTES ENERGIES LAB,F-91405 ORSAY,FRANCE

[2] ECOLE POLYTECH,CNRS,CPT,F-91128 PALAISEAU,FRANCE

来源：

NUCLEAR PHYSICS B | 1990年 / 336卷 / 01期

关键词：

D O I：

10.1016/0550-3213(90)90347-G

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

Finite-temperature radiative corrections to the weak neutron-proton decay rates are examined in the framework of real-time field theory. It is shown that infrared and collinear (electron mass) singularities cancel at O(α) when the total neutron ↔ proton conversion rates are computed. As a consequence, their perturbative expansion is valid at this order and may be used in helium abundance estimates. © 1990.

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页码：157 / 183

页数：27

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