41,244 research outputs found
A simple model of gauged lepton and baryon charges
We argue that simpler fermionic contents, responsible for the extension of
the standard model with gauged lepton and baryon charges, can be constructed by
assuming existence of so-called leptoquarks (j,k) with exotic electric charges
q_j=1/2, q_k=-1/2. Some new features in our model are that (i) as the natural
consequences of anomaly cancelation the right-handed neutrinos exist, and the
number of the observed fermion families is equal to the number of the
fundamental colors; (ii) although the lepton and baryon charges are conserved,
the neutrinos can obtain small masses through the type I seesaw mechanism in
similarity to the standard context, and the baryogenesis can be generated in
several cases. They all are natural results due to the spontaneous breaking of
these charges. Some constraints on the new physics via flavor changing and
related phenomenologies such as the stable scalar with anomalous electric
charge and interested processes at colliders are also discussed.Comment: 13 pages, revised versio
The T7 flavor symmetry in 3-3-1 model with neutral leptons
We construct a 3-3-1 model based on non-Abelian discrete symmetry
responsible for the fermion masses. Neutrinos get masses from only anti-sextets
which are in triplets and under . The
flavor mixing patterns and mass splitting are obtained without perturbation.
The tribimaximal form obtained with the breaking in
charged lepton sector and both and must be taken place in neutrino sector but only apart in
breakings (without contribution of
\si'), and the upper bound on neutrino mass at the level is
presented. The Dirac CP violation phase is predicted to either
or which is maximal CP violation. From the
Dirac CP violation phase we obtain the relation between Euler's angles which is
consistent with the experimental in PDG 2012. On the other hand, the realistic
lepton mixing can be obtained if both the direction for breakings and are taken place in
neutrino sectors. The CKM matrix is the identity matrix at the tree-level.Comment: 39 pages, 16 figures. arXiv admin note: substantial text overlap with
arXiv:1312.5034; and text overlap with arXiv:1304.0921, arXiv:1306.4138,
arXiv:1311.6729, arXiv:1310.4614 by other author
Single Z' production at CLIC based on e^- gamma collisions
We analyze the potential of CLIC based on e- gamma collisions to search for
new gauge boson. Single Z' production at e-gamma colliders in two SU(3)_C
X SU(3)_L X U(1)_N models: the minimal model and the model with right-handed
(RH) neutrinos is studied in detail. Results show that new Z' gauge bosons can
be observed at the CLIC, and the cross sections in the model with RH neutrinos
are bigger than those in the minimal one.Comment: 11 pages, 4 figures, To appear in JET
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