Electromagnetic leptogenesis

Journal Article · Wed Oct 15 04:00:00 EDT 2008 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.78.085024· OSTI ID:21254488

Bell, Nicole F; Law, Sandy S. C. ^[1]; Kayser, Boris J ^[2]

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1. School of Physics, University of Melbourne, Victoria 3010 (Australia)
2. Theoretical Physics Department, Fermilab, PO Box 500, Batavia, Illinois 60510-0500 (United States)

We present a new leptogenesis scenario, where the lepton asymmetry is generated by CP-violating decays of heavy electroweak singlet neutrinos via electromagnetic dipole moment couplings to the ordinary light neutrinos. Akin to the usual scenario where the decays are mediated through Yukawa interactions, we have shown, by explicit calculations, that the desired asymmetry can be produced through the interference of the corresponding tree-level and one-loop decay amplitudes involving the effective dipole moment operators. We also find that the relationship of the leptogenesis scale to the light neutrino masses is similar to that for the standard Yukawa-mediated mechanism.

• OSTI ID: 21254488
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 8 Vol. 78; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ASYMMETRY
COUPLING
CP INVARIANCE
DECAY AMPLITUDES
DIPOLE MOMENTS
ELECTROMAGNETIC FIELDS
INTERACTIONS
INTERFERENCE
LEPTONS
MASS
NEUTRINOS
PARTICLE DECAY
PARTICLE PRODUCTION
WEINBERG-SALAM GAUGE MODEL
YUKAWA POTENTIAL