全部 标题 作者
关键词 摘要

OALib Journal期刊
ISSN: 2333-9721
费用:99美元

查看量下载量

相关文章

更多...
Physics  1999 

Temperature Power Law of Equilibrium Heavy Particle Density

DOI: 10.1103/PhysRevD.61.123508

Full-Text   Cite this paper   Add to My Lib

Abstract:

A standard calculation of the energy density of heavy stable particles that may pair-annihilate into light particles making up thermal medium is performed to second order of coupling, using the technique of thermal field theory. At very low temperatures a power law of temperature is derived for the energy density of the heavy particle. This is in sharp contrast to the exponentially suppressed contribution estimated from the ideal gas distribution function. The result supports a previous dynamical calculation based on the Hartree approximation, and implies that the relic abundance of dark matter particles is enhanced compared to that based on the Boltzmann equation.

Full-Text

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133