Status of G2HDM with right handed neutrino coupling in the light of b→cτνanomalies

Abstract

Recent experimental measurements of several observables in semileptonic B meson decays have pointed towards the possibility of new physics. The LHCb collaboration has reported a significant deviation, exceeding 3.2 σ , in the combined measurement of the ratio of branching ratios R ( D ) − R ( D ⋆ ) from the predictions of the standard model. Furthermore, other observables, such as R J / ψ , P D ⋆ τ , F D ⋆ L , and R Λ c in the b → c ℓ ν transition, have also exhibited noticeable deviations from the standard model predictions. Motivated by these anomalies in the b → c τ ν transitions, we perform a log-likelihood fit incorporating new physics coming from right-handed neutrino couplings and explored the implications of a charged Higgs boson within a generic two Higgs doublet model (G2HDM). Our comprehensive analysis, focused on the τ ν and b τ ν final states, was performed using the High Luminosity run of the Large Hadron Collider (HL-LHC). We demonstrate that HL-LHC has the sensitivity to exclude the remaining allowed region in G2HDM model in explaining these anomalies with charged Higgs boson coupled to right-handed neutrino.