scholarly journals The muon g – 2 for low-mass pseudoscalar Higgs in the general 2HDM

2018 ◽  
Vol 179 ◽  
pp. 01022
Author(s):  
Adriano Cherchiglia ◽  
Dominik Stöckinger ◽  
Hyejung Stöckinger-Kim
Keyword(s):  
Large Deviation ◽  
Higgs Doublet ◽  
Type Ii ◽  
Parameter Region ◽  
Yukawa Couplings ◽  
The Standard Model ◽  
Low Mass ◽  
Doublet Model ◽  
Two Higgs Doublet Model ◽  
Theory And Experiment

The two-Higgs doublet model is a simple and attractive extension of the Standard Model. It provides a possibility to explain the large deviation between theory and experiment in the muon g – 2 in an interesting parameter region: light pseudoscalar Higgs A, large Yukawa coupling to τ-leptons, and general, non-type II Yukawa couplings are preferred. This parameter region is explored, experimental limits on the relevant Yukawa couplings are obtained, and the maximum possible contributions to the muon g – 2 are discussed.

scholarly journals Explaining Atomki anomaly and muon g − 2 in U(1)X extended flavour violating two Higgs doublet model

2021 ◽  
Vol 2021 (5) ◽  
Author(s):  
Takaaki Nomura ◽  
Prasenjit Sanyal
Keyword(s):  
Higgs Doublet ◽  
Scalar Boson ◽  
Parameter Region ◽  
Yukawa Couplings ◽  
Charge Assignment ◽  
Light Scalar ◽  
Doublet Model ◽  
Two Higgs Doublet Model ◽  
Scalar Sector ◽  
Lepton Flavour

Abstract We investigate a two Higgs doublet model with extra flavour depending U(1)X gauge symmetry where Z′ boson interactions can explain the Atomki anomaly by choosing appropriate charge assignment for the SM fermions. For parameter region explaining the Atomki anomaly we obtain light scalar boson with $$ \mathcal{O} $$ O (10) GeV mass, and we explore scalar sector to search for allowed parameter space. We then discuss anomalous magnetic dipole moment of muon and lepton flavour violating processes induced by Yukawa couplings of our model.

scholarly journals CKM FITS AND THE ROLE OF CHARM DECAYS

2011 ◽  
Vol 02 ◽  
pp. 107-111
Author(s):  
◽  
SÉBASTIEN DESCOTES-GENON
Keyword(s):  
Higgs Doublet ◽  
New Physics ◽  
Type Ii ◽  
Charm Decays ◽  
Ckm Matrix ◽  
The Standard Model ◽  
Doublet Model ◽  
Two Higgs Doublet Model

I review the role of charm decays in the determination of the structure of the CKM matrix within the Standard Model, focusing on γ,|Vcd| and |Vcs|. In addition, I illustrate how these decays can be used to constrain some New Physics scenario, taking as an example the Two Higgs-Doublet Model of type II.

scholarly journals Fitting the $$ Zb\overline{b} $$ vertex in the two-Higgs-doublet model and in the three-Higgs-doublet model

2021 ◽  
Vol 2021 (7) ◽  
Author(s):  
Darius Jurčiukonis ◽  
Luís Lavoura
Keyword(s):  
Experimental Data ◽  
Standard Model ◽  
Opposite Sign ◽  
Higgs Doublet ◽  
Yukawa Couplings ◽  
The Standard Model ◽  
Doublet Model ◽  
The One ◽  
Two Higgs Doublet Model

Abstract We investigate the new contributions to the parameters gL and gR of the $$ Zb\overline{b} $$ Zb b ¯ vertex in a multi-Higgs-doublet model (MHDM). We emphasize that those contributions generally worsen the fit of those parameters to the experimental data. We propose a solution to this problem, wherein gR has the opposite sign from the one predicted by the Standard Model; this solution, though, necessitates light scalars and large Yukawa couplings in the MHDM.

scholarly journals Light scalar dark matter extension of the type-II two-Higgs-doublet model

2018 ◽  
Vol 98 (3) ◽  
Author(s):  
Lei Wang ◽  
Rongle Shi ◽  
Xiao-Fang Han ◽  
Bin Zhu
Keyword(s):  
Dark Matter ◽  
Higgs Doublet ◽  
Type Ii ◽  
Light Scalar ◽  
Doublet Model ◽  
Two Higgs Doublet Model

ONE LOOP-INDUCED WZH COUPLING IN THE TWO HIGGS DOUBLET MODEL

1989 ◽  
Vol 04 (28) ◽  
pp. 2757-2766 ◽  
Author(s):  
THOMAS G. RIZZO
Keyword(s):  
Standard Model ◽  
Higgs Doublet ◽  
New Physics ◽  
Tree Level ◽  
Beyond The Standard Model ◽  
The Standard Model ◽  
Charged Higgs ◽  
Doublet Model ◽  
The One ◽  
Two Higgs Doublet Model

Although absent at the tree level in models with only doublet and singlet Higgs representations, the WZH coupling can be induced at the one-loop level. We examine the size of this induced coupling in the two Higgs doublet model due to fermion as well as Higgs/gauge boson loops. Such couplings could provide a new mechanism for charged Higgs production at colliders and are ‘backgrounds’ to new physics beyond the Standard Model. We find, however, that these couplings are very weak for all regions of the parameter space explored.

Running of the Yukawa Couplings in a Two Higgs Doublet Model

2008 ◽  
Author(s):  
J. H. Montes de Oca Y. ◽  
S. R. Juárez W. ◽  
P. Kielanowski ◽  
Heriberto Castilla-Valdez ◽  
Omar Miranda ◽  
...  
Keyword(s):  
Higgs Doublet ◽  
Yukawa Couplings ◽  
Doublet Model ◽  
Two Higgs Doublet Model
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