Quark decays in the early universe and matter-antimatter asymmetry

Details Quark decays in the early universe and matter-antimatter asymmetry Quark decays in the early universe and matter-antimatter asymmetry

Jan 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981nuphb.177..445m&link_type=abstract

Nuclear Physics B, Volume 177, Issue 3, p. 445-455.

Physics

Nuclear Physics

4

Scientific paper

We examine the recent suggestion made by one of us that baryon-number violating decays of integer charge quarks supplemented by isoconjugate milliweak CP violation, is responsible for the generation of the observed matter-antimatter asymmetry in the universe. The distinctive features of this mechanism are that the cosmic temperature scale relevant for the generation of the asymmetry is only few hundred MeV and the corresponding time scale is as large as 10-6 to 10-5 sec to be contrasted with temperatures >~ 1012 GeV and time scales <~ 10-30 sec for alternative models. We show that this mechanism yields rather naturally a baryon to entropy ratio in accord with the observed value of ~ 10-8 to 10-8. The implications of these considerations for quark and proton lifetimes are noted.
On sabbatical leave from the University of Maryland, College Park, Maryland, USA.

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