1998/02/16 by Rachel Jeannerot, R. Jeannerot, Jeannerot, R.
Physics and Astronomy · #Cosmology and Gravitation Theories #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #hep-ph
paper · pdf · doi:10.48550/arxiv.hep-ph/9802333
Published in the Proceedings of the XXXIInd Rencontres de Moriond on ``Electroweak Interactions and Unified Theories'', Les Arcs, Savoie, France, March 15-22, 1997
arxiv created 1998/02/16 · openalex publication_date 1998/02/16 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
A new scenario for baryogenesis is described. The basic idea is that theories beyond the standard model which contain a \rm U(1)B-L gauge symmetry, where B and L are respectively baryon and lepton numbers, predict the existence of B-L cosmic strings with right-handed neutrinos trapped as transverse zero modes. Cosmic string loops loose their energy via gravitational radiation and rapidly decay releasing these right-handed neutrinos. These decay into lepton and electroweak Higgs boson producing an initial lepton asymmetry. This lepton asymmetry is then converted into a baryon asymmetry via sphaleron transitions. The minimal extension of the standard model and the minimal grand unified theory for which this scenario works are respectively \rm SU(3)c × \rm SU(2)L × \rm U(1)R × \rm U(1)B-L and SO(10).