414 research outputs found
Higgs revised in Supersymmetric Economical 3-3-1 model with B/\mu-type terms
We re-investigate the scalar potential and the Higgs sector of the
supersymmetric economical 3-3-1 model (SUSYE331) in the presence of the B/\mu
type terms which has many important consequences. First, the model contains no
massless Higgs fields. Second, we prove that the soft mass parameters of
Higgses must be at the SU(3)_L scale. As a result, the masses of the Higgses
drift toward this scale except one light real neutral Higgs with the mass of
m_Z|cos(2\gamma)| at the tree level. We also show that there are some Higgses
containing many properties of the Higgses in the minimal supersymmetric
standard model (MSSM), especially in the neutral Higgs sector. One exact
relation in the MSSM, m^2_H^{+/-}=m^2_A+m^2_W, is still true in the SUSYE331.
Based on this result we make some comments on the lepton flavor violating
decays of these Higgses as one of signatures of new physics in the SUSYE331
model which may be detected by present colliders.Comment: Matches version accepted for publication in EPJC. Typos are
corrected. We add a new section, a new appendix, a new figure and new
references to explain more clearly the properties of the lightest neutral
Higgs. Results unchange
Large signal of within the constraints of decays in the 3-3-1 model with neutral leptons
In the framework of the 3-3-1 model with neutral leptons, we have
investigated the lepton-flavor-violating sources based on the Higgs mass
spectrum which has two neutral Higgses identitied with corresponding ones in
the Two-Higgs-Doublet model (THDM). On the scale of the LHC,
we point out the parameter space regions where the experimental limits of decays are satisfied. These regions depend heavily on
the mixing of exotic leptons but are predicted to have large signals. We also show that
can reach a value of .Comment: 30 pages, 9 figure
One-loop contributions to decays and anomalies, and Ward identity
In this paper, we will present analytic formulas to express one-loop
contributions to lepton flavor violating decays , which are
also relevant to the anomalous dipole magnetic moments of charged leptons
. These formulas were computed in the unitary gauge, using the well-known
Passarino-Veltman notations. We also show that our results are consistent with
those calculated previously in the 't Hooft-Veltman gauge, or in the limit of
zero lepton masses. At the one-loop level, we show that the appearance of
fermion-scalar-vector type diagrams in the unitary gauge will violate the Ward
Identity relating to an external photon. As a result, the validation of the
Ward Identity guarantees that the photon always couples with two identical
particles in an arbitrary triple coupling vertex containing a photon.Comment: The version accepted to Nuclear Physics
(g-2)_{e, mu} and decays e_b--> e_a\gamma in a SU(4)_L x U(1)_X model with inverse seesaw neutrinos
We will show that the 3-4-1 model with heavy right-handed neutrinos can
explain the recent experimental data of (g-2)_{e, mu} anomalies of charged
leptons and neutrino oscillations through the inverse seesaw mechanism. In
addition, the model can predict large lepton flavor violating decay rates mu
--> e gamma and tau --> mu gamma, e gamma up to the recent experimental
sensitivitiesComment: 28 pages, 8 figure
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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