Baryon Asymmetry, Dark Matter and the Hidden Sector

✍ Scribed by Luís Bento; Zurab Berezhiani

• Publisher: John Wiley and Sons
• Year: 2002
• Tongue: English
• Weight: 102 KB
• Volume: 50
• Category: Article
• ISSN: 0015-8208
• DOI: 10.1002/1521-3978(200205)50:5/7<489::aid-prop489>3.0.co;2-o

✦ Synopsis

We propose a mechanism in which the baryon asymmetry of the Universe is produced in out-of-equilibrium, B À L and CP violating scattering processes that convert ordinary particles into particles of some hidden sector. The same mechanism should produce a non-zero asymmetry also in the hidden sector particles and thus the latter could provide a natural candidate for the dark matter. We discuss the example of the hidden mirror sector, which also provides a natural framework for the sterile neutrinos, and consider the processes lf ! l 0 f 0 ; l l 0 f f 0 mediated by the heavy Majorana neutrinos N of the seesaw mechanism, where l and f are ordinary lepton and Higgs doublets and l 0 , f 0 their hidden counterparts.