Constraints on Majoron Models, Neutrino Masses and Baryogenesis

Abstract

We derive strong contraints on the Yukawa couplings and the vacuum expectation value in the singlet majoron model, taking into account the possibility of a small gravitationally induced mass for the majoron. If the present baryon asymmetry was created earlier than at the electroweak phase transition, then to preserve it from the combined effects of lepton number violating interactions and electroweak sphalerons, we find that stringent constraints on the Yukawa couplings, $h<10^{-7}$, and the majoron scale, $v_s<v_{EW}$, must be satisfied. We also carefully rederive baryogenesis bounds on neutrino masses, finding that in general they apply not to the masses themselves, but only to related parameters, and they are numerically somewhat less stringent than has previously been claimed.

19pp., latex, UMN-TH-1113-93

References in corpus (5)

• Planck-Scale Physics and the Peccei-Quinn Mechanism
• Solutions to the strong CP problem in a world with gravity
• On the Baryon, Lepton-Flavour and Right-Handed Electron Asymmetries of the Universe
• Planck Scale Effects on the Majoron
• Supersymmetry Protects the Primordial Baryon Asymmetry

Cited by in corpus (14)

• Protecting the Primordial Baryon Asymmetry From Erasure by Sphalerons
• CMB Signals of Neutrino Mass Generation
• Neutrino Masses
• Connecting neutrino physics with dark matter
• Testing Dark Matter Models with Radio Telescopes in light of Gravitational Wave Astronomy
• Two-field cosmological phase transitions and gravitational waves in the singlet Majoron model
• The Invisible Axion and Neutrino Masses
• Gravitationally violated U(1) symmetry and neutrino anomalies
• Leptogenesis from oscillations and dark matter
• Phase Transitions and Baryogenesis From Decays
• Limiting Majoron self-interactions from Gravitational waves experiments
• Majoron Decay in Matter
• Insights on the Cosmic Origin of Matter from Proton Stability
• Non--Baryonic Dark Matter