Warped Leptogenesis with Dirac Neutrino Masses

Abstract

We show how leptogenesis can occur at the TeV scale with neutrinos that possess almost purely Dirac masses and negligible Majorana mass contributions as a consequence of the small wavefunction overlap in a warped fifth dimension. Lepton number violation at the Planck scale is introduced via a Majorana mass term on the Planck brane. Such a Majorana mass operator leads to the small mass splitting of otherwise degenerate Kaluza-Klein excited states on the TeV brane. This tiny mass splitting can compensate for the small Yukawa couplings to give a CP asymmetry large enough to produce the sufficient baryon asymmetry from the decay of the nearly degenerate neutrino Kaluza-Klein states. In this way the standard baryogenesis via leptogenesis scenario can naturally occur at the TeV scale without the need for a high mass scale.

Typos corrected

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Cited by in corpus (14)

• Flavour Covariant Transport Equations: an Application to Resonant Leptogenesis
• Neutrino masses and mixing from S4 flavor twisting
• The Little Review on Leptogenesis
• The Seesaw Mechanism in Quark-Lepton Complementarity
• Electroweak Resonant Leptogenesis in the Singlet Majoron Model
• Resonant Dirac leptogenesis on throats
• Light Neutrinos from a Mini-Seesaw Mechanism in Warped Space
• Sterile neutrino dark matter in warped extra dimensions
• Leptogenesis With Many Neutrinos
• Neutrino Mass and $\mu \to e+\gamma$ from a Mini-Seesaw
• Dirac Vs. Majorana Neutrino Masses From a TeV Interval
• Electron neutrino mass scale in spectrum of Dirac equation with the 5-form flux term on the AdS(5)xS(5) background
• Spinor vertexes and bubbles in the "old" conformal bootstrap on AdS and FMH problem: Yukawa model
• Leptogenesis in five-dimensional asymptotic Grand Unification models