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High Energy Physics - Phenomenology

arXiv:hep-ph/0407063 (hep-ph)
[Submitted on 6 Jul 2004]

Title:New Ways to Soft Leptogenesis

Authors:Yuval Grossman, Tamar Kashti, Yosef Nir, Esteban Roulet
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Abstract: Soft supersymmetry breaking terms involving heavy singlet sneutrinos provide new sources of lepton number violation and of CP violation. In addition to the CP violation in mixing, investigated previously, we find that `soft leptogenesis' can be generated by CP violation in decay and in the interference of mixing and decay. These additional ways to leptogenesis can be significant for a singlet neutrino Majorana mass that is not much larger than the supersymmetry breaking scale, $M < 100 m_{SUSY}$. In contrast to CP violation in mixing, for some of these new contributions the sneutrino oscillation rate can be much faster than the decay rate, so that the bilinear scalar term need not be smaller than its natural scale.
Comments: 18 pages, 3 figures
Subjects: High Energy Physics - Phenomenology (hep-ph)
Report number: SLAC-PUB-10519, WIS/18/04-July-DPP
Cite as: arXiv:hep-ph/0407063
  (or arXiv:hep-ph/0407063v1 for this version)
  https://doi.org/10.48550/arXiv.hep-ph/0407063
Journal reference: JHEP0411:080,2004
Related DOI: https://doi.org/10.1088/1126-6708/2004/11/080

Submission history

From: Tamar Kashti [view email]
[v1] Tue, 6 Jul 2004 07:45:11 UTC (86 KB)
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