Abstract
In models where the Standard Model spectrum is localized on a brane embedded in a higher-dimensional spacetime, we discuss the lepton number violation induced by the emission of right-handed neutrinos from the brane. We show that the presence of the right-handed neutrinos in the bulk may lead to rapid lepton number violating processes which above the electroweak scale would wash away any prior lepton or baryon asymmetry. We derive constraints on the Yukawa couplings of these states in order to preserve the lepton asymmetry. We show that this has a natural interpretation in the brane world.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 194-203 |
| Number of pages | 10 |
| Journal | Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics |
| Volume | 549 |
| Issue number | 1-2 |
| DOIs | |
| State | Published - Nov 28 2002 |
Bibliographical note
Funding Information:We thank Gia Dvali, Gregory Gabadadze, Kimmo Kainulainen, Maxim Pospelov, and Misha Voloshin for useful discussions, and Jim Cline and Elias Kiritsis for useful e-mail exchange. We especially thank Daniel Chung for many fruitful discussions and e-mail exchange. This work was supported in part by DOE grant DE-FG02-94ER40823 at the University of Minnesota.