μ-term as the origin of baryon and lepton number asymmetry

2002/07/31 by Daijiro Suematsu · 2 citations
Physics and Astronomy · #Cosmology and Gravitation Theories #Neutrino Physics Research #Particle physics theoretical and experimental studies #hep-ph

paper · pdf · doi:10.1088/0954-3899/31/5/014

published as J.Phys. G31 (2005) 445-458 · 22 pages, published version

arxiv created 2005/03/03 · openalex publication_date 2005/04/12 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/30

Abstract

We study a possibility of combining an origin of the μ-term and the baryon and lepton number asymmetry. If we assume that the μ-term is generated through a flat direction of a singlet scalar field, the coherent oscillation of this condensate around its potential minimum can store the global U (1) charge asymmetry. The decay of this condensate can distribute this asymmetry into the lepton and baryon number asymmetry as long as its decay occurs at an appropriate temperature. We examine the compatibility between this scenario and the small neutrino mass generation based on both the ordinary seesaw mechanism and the bilinear R -parity violating terms.

Citations

• Direct Evidence for Neutrino Flavor Transformation from Neutral-Current Interactions in the Sudbury Neutrino Observatory
• Measurement of Day and Night Neutrino Energy Spectra at SNO and Constraints on Neutrino Mixing Parameters
• Measurement of the rate of nu_e + d --> p + p + e^- interactions produced by 8B solar neutrinos at the Sudbury Neutrino Observatory
• Search for Electron Neutrino Appearance in a 250 km Long-Baseline Experiment
• On anomalous electroweak baryon-number non-conservation in the early universe

Cited by

• Nonthermal production of baryon and dark matter
• Dark world and baryon asymmetry from a common source