scholarly journals Flavor constraints on two-Higgs-doublet models with general diagonal Yukawa couplings

2010 ◽  
Vol 81 (3) ◽  
Author(s):  
F. Mahmoudi ◽  
O. Stål
Keyword(s):  
Higgs Doublet ◽  
Yukawa Couplings ◽  
Two Higgs Doublet Models

scholarly journals THE b→sgg DECAY IN THE TWO AND THREE HIGGS DOUBLET MODELS WITH CP VIOLATING EFFECTS

2001 ◽  
Vol 16 (10) ◽  
pp. 1759-1773
Author(s):  
A. GOKSU ◽  
E. O. ILTAN ◽  
L. SOLMAZ
Keyword(s):  
Decay Width ◽  
Higgs Doublet ◽  
Inclusive Process ◽  
Cp Asymmetry ◽  
Yukawa Couplings ◽  
Two Higgs Doublet Models ◽  
Considerable Enhancement

We study the decay width and CP asymmetry of the inclusive process b→sgg (g denotes gluon) in the three and two Higgs doublet models with complex Yukawa couplings. We analyze the dependencies of the differential decay width and CP asymmetry to the s-quark energy Es and CP violating parameter θ. We observe that there exist a considerable enhancement in the decay width and CP asymmetry is at the order of 10-2. Further, it is possible to predict the sign of [Formula: see text] using the CP asymmetry.

scholarly journals The framework for a common origin of $$\delta _{\mathrm{CKM}}$$ and $$\delta _{\mathrm{PMNS}}$$

2021 ◽  
Vol 81 (8) ◽  
Author(s):  
Joao M. Alves ◽  
Francisco J. Botella ◽  
Gustavo C. Branco ◽  
Fernando Cornet-Gomez ◽  
Miguel Nebot
Keyword(s):  
Higgs Doublet ◽  
Common Origin ◽  
Tree Level ◽  
Minimal Flavour Violation ◽  
Yukawa Couplings ◽  
Cp Violations ◽  
Flavour Violation ◽  
Two Higgs Doublet Models ◽  
Near Future ◽  
Two Sectors

AbstractWe analyse a possible connection between CP violations in the quark and lepton sectors, parametrised by the CKM and PMNS phases. If one assumes that CP breaking arises from complex Yukawa couplings, both in the quark and lepton sectors, the above connection is not possible in general, since Yukawa couplings in the two sectors have independent flavour structures. We show that both the CKM and PMNS phases can instead be generated by a vacuum phase in a class of two Higgs doublet models, and in this case a connection may be established. This scenario requires the presence of scalar FCNC at tree level, both in the quark and lepton sectors. The appearance of these FCNC is an obstacle and a blessing. An obstacle since one has to analyse which models are able to conform to the strict experimental limits on FCNC, both in the quark and lepton sectors. A blessing, because this class of models is falsifiable since FCNC arise at a level which can be probed experimentally in the near future, specially in the processes $$\mathrm{h}\rightarrow e^\pm \tau ^\mp $$ h → e ± τ ∓ and $$t\rightarrow \mathrm{h}c$$ t → h c . The connection between CP violations in CKM and PMNS is explicitely illustrated in models with Minimal Flavour Violation.

scholarly journals Dynamics of Nambu monopole in two Higgs doublet models. Cosmological Monopole Collider

2020 ◽  
Vol 2020 (7) ◽  
Author(s):  
Minoru Eto ◽  
Yu Hamada ◽  
Masafumi Kurachi ◽  
Muneto Nitta
Keyword(s):  
Higgs Doublet ◽  
Two Higgs Doublet Models

scholarly journals Limits on neutrinophilic two-Higgs-doublet models from flavor physics

2016 ◽  
Vol 2016 (1) ◽  
Author(s):  
Enrico Bertuzzo ◽  
Yuber F. Perez G. ◽  
Olcyr Sumensari ◽  
Renata Zukanovich Funchal
Keyword(s):  
Flavor Physics ◽  
Higgs Doublet ◽  
Two Higgs Doublet Models

scholarly journals New limits on tanβ for 2HDMs with Z2 symmetry

2015 ◽  
Vol 30 (26) ◽  
pp. 1550158 ◽  
Author(s):  
Dipankar Das
Keyword(s):  
Lower Limit ◽  
Scalar Potential ◽  
Higgs Doublet ◽  
Exact Formula ◽  
Meson Mass ◽  
Neutral Meson ◽  
Breaking Parameter ◽  
Two Higgs Doublet Models ◽  
Breaking Term

In two-Higgs-doublet models with exact [Formula: see text] symmetry, putting [Formula: see text] at the alignment limit, the following limits on the heavy scalar masses are obtained from the conditions of unitarity and stability of the scalar potential: [Formula: see text], [Formula: see text], [Formula: see text] and [Formula: see text]. The constraints from [Formula: see text] and neutral meson mass differences, when superimposed on the unitarity constraints, put a tighter lower limit on [Formula: see text] depending on [Formula: see text]. It has also been shown that larger values of [Formula: see text] can be allowed by introducing soft breaking term in the potential at the expense of a correlation between [Formula: see text] and the soft breaking parameter.

scholarly journals Neutral minima in two-Higgs doublet models

2007 ◽  
Vol 652 (4) ◽  
pp. 181-193 ◽  
Author(s):  
A. Barroso ◽  
P.M. Ferreira ◽  
R. Santos
Keyword(s):  
Higgs Doublet ◽  
Two Higgs Doublet Models
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