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Heavy neutrino mass hierarchy from leptogenesis in left–right symmetric models with spontaneous CP-violation

DSpace at IIT Bombay

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Title Heavy neutrino mass hierarchy from leptogenesis in left–right symmetric models with spontaneous CP-violation
 
Creator SAHU, NARENDRA
UMA SANKAR, S
 
Subject neutrino oscillations
lepton production
cp invariance
lagrangian field theory
 
Description We consider left–right symmetric model with spontaneous CP-violation. The Lagrangian of this model is CP invariant and the Yukawa couplings are real. Due to spontaneous breaking of the gauge symmetry, some of the neutral Higgses acquire complex vacuum expectation values, which lead to CP-violation. In the model considered here, we identify the neutrino Dirac mass matrix with that of Fritzsch type charged lepton mass matrix. We assume a hierarchical spectrum of the right-handed neutrino masses and derive a bound on this hierarchy by assuming that the decay of the lightest right-handed neutrino produces the baryon asymmetry via the leptogenesis route. It is shown that the mass hierarchy we obtain is compatible with the current neutrino oscillation data.
 
Publisher Elsevier
 
Date 2009-04-08T06:49:38Z
2011-11-25T20:52:03Z
2011-12-26T13:08:42Z
2011-12-27T05:33:59Z
2009-04-08T06:49:38Z
2011-11-25T20:52:03Z
2011-12-26T13:08:42Z
2011-12-27T05:33:59Z
2005
 
Type Article
 
Identifier Nuclear Physics B 724(1-2), 329-342
0550-3213
http://dx.doi.org/10.1016/j.nuclphysb.2005.07.005
http://hdl.handle.net/10054/1158
http://dspace.library.iitb.ac.in/xmlui/handle/10054/1158
 
Language en