Small neutrino masses from structural cancellation in left-right symmetric model

Neutrino Masses and Leptogenesis in Left–Right Symmetric Models: A Review From a Model Building Perspective

1 Laboratoire de Physique Corpusculaire, Centre National de la Recherche Scientifique/IN2P3 UMR 6533, Aubière, France, 2 Department of Physics, Indian Institute of Technology Bhilai, Chhattisgarh, India, 3 Center of Excellence in Theoretical and Mathematical Sciences, Siksha ‘O’ Anusandhan University, Bhubaneswar, India, 4 Department of Physics, Indian Institute of Technology Kharagpur, Kharagp...

Leptogenesis bound on neutrino masses in left-right symmetric models with spontaneous D-parity violation

We study the baryogenesis via leptogenesis in a class of left-right symmetric models, in which D-parity is broken spontaneously. We first discuss the consequence of the spontaneous breaking of D-parity on the neutrino masses. Than we study the lepton asymmetry in various cases, from the decay of right handed neutrino as well as the triplet Higgs, depending on their relative masses they acquire ...

Gauge-Boson Masses and Mixings in Left-Right---Symmetric Models

The standard SU(2)t 8 U(l) gauge model' can accommodate all the present electroweak data. The recent discovery of the weak gauge bosons at CERN, with average masses M~= 80.9+ 2.0 GCV and Mz = 93.0+ 2.0 GCV, confirmed the validity of the standard model at low energies. These masses, in conjunction with the extrapolated and corrected value of the weak mixing angle, sin 0 = 0.217 + 0.014, and with...

+ in the Left - Right Symmetric Model

Small Neutrino Masses from Supersymmetry Breaking

An alternative to the conventional see-saw mechanism is proposed to explain the origin of small neutrino masses in supersymmetric theories. The masses and couplings of the right-handed neutrino field are suppressed by supersymmetry breaking, in a way similar to the suppression of the Higgs doublet mass, μ. New mechanisms for light Majorana, Dirac and sterile neutrinos occur, depending on the de...