scholarly journals Higgs boson contributions to neutrino production ine−e+collisions in a left-right symmetric model

1995 ◽  
Vol 51 (9) ◽  
pp. 4695-4706 ◽  
Author(s):  
J. Gluza ◽  
M. Zrałek
Keyword(s):  
Higgs Boson ◽  
Symmetric Model ◽  
Neutrino Production

Neutrino production ine+e−collisions in a left-right-symmetric model

1993 ◽  
Vol 48 (11) ◽  
pp. 5093-5105 ◽  
Author(s):  
J. Gluza ◽  
M. Zrałek
Keyword(s):  
Symmetric Model ◽  
Neutrino Production

scholarly journals The Higgs boson decays with the lepton flavor violation

2018 ◽  
Vol 33 (17) ◽  
pp. 1850103 ◽  
Author(s):  
O. M. Boyarkin ◽  
G. G. Boyarkina ◽  
D. S. Vasileuskaya
Keyword(s):  
Higgs Boson ◽  
Branching Ratio ◽  
Vacuum Expectation ◽  
Theoretical Expression ◽  
Symmetric Model ◽  
Third Order ◽  
Mixing Angle ◽  
Neutrino Sector ◽  
Lepton Flavor ◽  
Decay Widths

Within the left–right symmetric model (LRM), the decays [Formula: see text] where [Formula: see text] is an analog of the Standard Model Higgs boson, are considered. The widths of this decays are found in the third-order of the perturbation theory. Since the main contribution to the decay widths is caused by the diagram with the light and heavy neutrinos in the virtual state, then investigation of this decays could shed light upon the neutrino sector structure. The obtained decay widths critically depend on the charged gauge bosons mixing angle [Formula: see text] and the heavy–light neutrinos mixing angle [Formula: see text]. The LRM predicts the values of these angles as functions of the vacuum expectation values [Formula: see text] and [Formula: see text]. Using the results of the existing experiments, on looking for the additional charged gauge boson [Formula: see text] and on measuring the electroweak [Formula: see text] parameter, gives [Formula: see text] However, even using the upper bounds on [Formula: see text] and [Formula: see text], one does not manage to get the upper experimental bound on the branching ratio [Formula: see text] being equal to [Formula: see text]. The theoretical expression proves to be on two orders of magnitude less than [Formula: see text].

scholarly journals Atomki anomaly in gauged U(1)R symmetric model

2021 ◽  
Vol 2021 (4) ◽  
Author(s):  
Osamu Seto ◽  
Takashi Shimomura
Keyword(s):  
Higgs Boson ◽  
Rare Decays ◽  
Gauge Boson ◽  
Electron Scattering ◽  
Higgs Bosons ◽  
Symmetric Model ◽  
Parameter Region ◽  
Stringent Constraint

Abstract The Atomki collaboration has reported that unexpected excesses have been observed in the rare decays of Beryllium nucleus. It is claimed that such excesses can suggest the existence of a new boson, called X, with the mass of about 17 MeV. To solve the Atomki anomaly, we consider a model with gauged U(1)R symmetry and identify the new gauge boson with the X boson. We also introduce two SU(2) doublet Higgs bosons and one singlet Higgs boson, and discuss a very stringent constraint from neutrino-electron scattering. It is found that the U(1)R charges of the doublet scalars are determined to evade the constraint. In the end, we find the parameter region in which the Atomki signal and all experimental constraints can be simultaneously satisfied.

On probing Higgs couplings in H → Ze+e− and e+e−→ ZH

2016 ◽  
Vol 31 (04n05) ◽  
pp. 1650005 ◽  
Author(s):  
O. M. Boyarkin ◽  
G. G. Boyarkina
Keyword(s):  
Higgs Boson ◽  
Large Hadron Collider ◽  
Standard Model ◽  
Gauge Boson ◽  
Hadron Collider ◽  
Grand Unification ◽  
Symmetric Model ◽  
High Luminosity ◽  
The Standard Model ◽  
Effective Rank

Two most popular GUT scenarios, namely, the left–right symmetric model (LRM) and models coming from [Formula: see text] grand unification (effective rank 5 models (ER5M’s)) are considered. Both models forecast existence of the extra neutral gauge boson. Its contributions to the decay of the Higgs boson being an analog of the Standard Model (SM) Higgs boson [Formula: see text] and the process of the associated Higgs production with [Formula: see text] boson (Higgsstrahlung) [Formula: see text] are found. For both processes, deviations from the SM predicted by the LRM prove to be larger than that predicted by the ER5M’s. It is shown that in the case of the decay [Formula: see text] it is impossible to observe these deviations at the condition of the High Luminosity Large Hadron Collider. Investigation of the Higgsstrahlung disclosed that with its help one could make a choice between the SM and the SM extensions under consideration.

scholarly journals Lowest limits on the doubly charged Higgs boson masses in the minimal left-right symmetric model

2014 ◽  
Vol 90 (9) ◽  
Author(s):  
G. Bambhaniya ◽  
J. Chakrabortty ◽  
J. Gluza ◽  
T. Jeliński ◽  
M. Kordiaczyńska
Keyword(s):  
Higgs Boson ◽  
Charged Higgs Boson ◽  
Symmetric Model ◽  
Charged Higgs ◽  
Doubly Charged
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