Higgs boson decays mediated by flavor changing neutral currents (FCNC) are very much suppressed in the Standard Model, at the level of 10 for Higgs boson masses of a few hundred GeV . Therefore, any experimental vestige of them would immediately call for new physics. In this paper we consider the FCNC decays of Higgs bosons into top quarks in a general two-Higgs-doublet model (2HDM). The isolat...

We present the computation of the leading one-loop electroweak radiative corrections to the non-standard top quark decay width Γ(t → H b), using a physically motivated definition of tanβ. We find that the corrections are large, both in the Minimal Supersymmetric Standard Model (MSSM) and the Two-Higgs-Doublet Model (2HDM). These corrections have an important effect on the interpretation of the ...

The recently reported measurement of the W-boson mass by CDF-II collaboration is significantly heavier than that Standard Model prediction. We study this anomaly in scale invariant Two-Higgs-Doublet-Model (SI-2HDM) with a Z2 symmetry to avoid flavor-changing-neutral-current (FCNC). In scenario Higgs particle classically massless scalon SI-2HDM gaining its radiative corrections, hence being natu...

The asymmetries Ak ≡ [Γ(t → Wdk)−Γ(t̄ → Wd̄k)]/[Γ(t → Wdk)+Γ(t̄ → Wd̄k)] in the partial widths of the top quark decays are discussed within the Standard Model (SM), the Two-Higgs-Doublet Model (2HDM) and supersymmetric extensions of the SM (SSM). The leading contributions to these asymmetries in the SM and in the 2HDM are induced by the up-type quark self-energy diagrams and are found to be very sm...

We consider the Maximally Symmetric Two-Higgs Doublet Model (MS-2HDM) in which so-called Standard (SM) alignment can be achieved naturally by virtue of an SO(5) symmetry imposed on 2HDM. investigate signature MS-2HDM via $p p \to HX VV^* X$ and HHX VV^*V'V'^* processes at LHC for different values $\tan \beta$. perform our calculations with NLO QCD accuracy, using \textsf{Herwig~7} multi-purpose...

One very light neutral Higgs scalar with mass, say, below 40-50 GeV is still allowed in the non-supersymmetric 2HDM (Model II), while the remaining particles of the Higgs sector in this model have to be heavier. The possibility of testing such a scenario at Muon Colliders is discussed.

We perform a comprehensive study of the allowed parameter space Two Higgs Doublet Model Type II (2HDM-II). Using theoretical framework flavio we combine most recent flavour, collider and electroweak precision observables with constraints to obtain bounds on mass spectrum theory. In particular find that 2HDM-II fits data slightly better than Standard (SM) best fit values heavy masses around 2 Te...

The radiative leptonic B c → τ ¯ ν τ γ decay is analysed in context of 2HDM. It is shown that with large values of tanβ, the contributions of Model II to the decay rate exceeds considerably the Standard Model ones, while the contributions of Model I overlap with the Standard Model predictions.

Recently CDF II Collaboration reported that they measured W boson mass precisely. The measurement is deviated from the Standard Model (SM) Prediction at 7σ. Also, recent FNAL of muon magnetic moment shows a 4.2σ deviation. To resolve as well (g−2) anomalies, we explore type-X two Higgs doublet model (2HDM). We analyze (mA,tan⁡β) parameter space 2HDM consistent with (g−2), lepton universality te...