Thursday, February 7, 2013

1302.1504 (Gabriel Lopez Castro et al.)

Bounding resonant Majorana neutrinos from four-body B and D decays    [PDF]

Gabriel Lopez Castro, Nestor Quintero
Searches of lepton-number violation in different processes are very useful to constrain the parameter space of Majorana neutrinos. Here we use available upper bounds on the branching fractions of B^- -> D^0pi^+mu^-mu^- and D^0 -> (pi^-pi^-/K^-pi^-) mu^-mu^- decays to derive constraints on the mass and mixings of Majorana neutrinos by assuming they are produced resonantly in these four-body decays. While the excluded region obtained from B^- decays are competitive with existing limits from three-body D^- and B^- decays, it is shown that experimental improvements on D^0 decays offer a good potential to provide similar results.
View original: http://arxiv.org/abs/1302.1504

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