Physics International 6
, 23-32 (2015)
A Simple Model of Gauged Lepton and Baryon Charges
P.V. Dong and H.N. Long
We propose a simple extension of the standard model with lepton
and baryon numbers gauged by introducing only two leptoquarks (j+1/2, k-1/2) to
the fermion content. As natural consequences of the anomaly cancelation, the
right-handed neutrinos present and the number of observed fermion families
equals to the number of fundamental colors, which is three. To avoid stabilized
colored-leptoquarks, two scalar doublets , ' are introduced which couple the
leptoquarks to ordinary quarks. The new gauge bosons '
Z , '
Z gain masses via
the vacuum values of scalars SL, SB which are only charged under the U(1)L,
U(1)B symmetries, respectively. Furthermore, due to the spontaneous symmetry
breaking of these charges, the neutrinos obtain small masses via type I seesaw
mechanism while the baryogenesis can be generated in several cases.
Constraints coming from flavor changing, stabilization of anomalously electriccharged
scalars and collision phenomenology are also obtained.