Late-time entropy production and relic abundances of neutralinos

Takaaki Nagano, Masahiro Yamaguchi

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)


Many models possess unwanted relics, which should be diluted by entropy production just before the big-bang nucleosynthesis. A field responsible for the entropy production may produce stable weakly interacting massive particles, if kinematically accessible. We compute their relic abundances by integrating out coupled equations numerically. Applying our results to supersymmetric standard models, we argue that the neutralino lightest superparticles will overdose the universe in most of the parameter space if the reheat temperature is of the order of 10 MeV.

Original languageEnglish
Pages (from-to)267-272
Number of pages6
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Issue number3-4
Publication statusPublished - 1998 Oct 22


Dive into the research topics of 'Late-time entropy production and relic abundances of neutralinos'. Together they form a unique fingerprint.

Cite this