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...

We revisit dark matter annihilation as an explanation of the positron excess reported recently by AMS-02 satellite-borne experiment. To this end, we propose a particle model considering Two Higgs Doublet Model (2HDM) extended with additional singlet boson and fermion. The (light) mixes pseudoscalar inherent in 2HDM, fermion, which is candidate, annihilates via bosonic portal. candidate made lep...

We introduce a strategy to study the parameter space of the general, CP-conserving, twoHiggs-doublet Model (2HDM) with a softly broken Z2-symmetry by means of a new “hybrid” basis. In this basis the input parameters are the measured values of the mass of the observed Standard Model (SM)-like Higgs boson and its coupling strength to vector boson pairs, the mass of the second CP-even Higgs boson,...

We will investigate the scenario in which the Standard Model (SM) Higgs sector and its two-doublet extension (called the Two Higgs Doublet Model or 2HDM) are the "portal" for the interactions between the Standard Model and a fermionic Dark Matter (DM) candidate. The latter is the lightest stable neutral particle of a family of vector-like leptons (VLLs). We will provide an extensive overview of...