ExclusiveB→VVdecays andCPviolation in the general two-Higgs-doublet model

Abstract

Using the general factorization approach, we present a detailed investigation for the branching ratios, CP asymmetries and longitudinal polarization fractions in all charmless hadronic B → V V decays (except for the pure annihilation processes) within the most general two-Higgsdoublet model with spontaneous CP violation. It is seen that such a new physics model only has very small contributions to the branching ratios and longitudinal polarization fractions. However, as the model has rich CP-violating sources, it can lead to significant effects on the CP asymmetries, especially on those of penguin-dominated decay modes, which provides good signals for probing new physics beyond the SM in the future B-physics experiments.

Charmless $$B_{(s)}\rightarrow VV$$ B ( s ) → V V decays in factorization-assisted topological-amplitude approach

“…Later on, some other penguin-dominated strangeness-changing decays, such as B → ρ K * and B s → φφ, have also been found with large transverse polarization fractions. These large unexpected transverse polarization fractions have attracted much theoretical attention with several explanations based on the QCDF [36][37][38][39][40][41][42], PQCD [43][44][45], even on the new physics scenarios [46][47][48][49][50][51][52][53][54][55]. These decays have rich observables, some of which are regarded as good places for testing the SM and searching for possible effects of new physics beyond the SM.…”

Two Higgs bidoublet model with spontaneousPandCPviolation and decoupling limit to the two Higgs doublet model

“…As a consequence, the Higgs mass spectra in the 2HBDM have been obtained with reasonable approximation, where the three neutral and one pair of charged Higgs become naturally light Higgs bosons with masses at the electroweak scale and may be explored at LHC and ILC colliders [31,32], and the sources of CP violation in the 2HBDM also get much richer and may show up in low energy processes such as rare B decays [33][34][35][36].…”

“…(39) resulted from the limit case Eqs. (32) and (33). It is manifest that φ 1 and χ 1 will acquire small masses at the electroweak scale after SU(2) L symmetry breaking from λ terms in Eq.…”

Searches forBMeson Decays toϕϕ,ϕρ,ϕf0Aubert1, Bóna2, Karyotakis3 et al. 2008Phys. Rev. Lett.13040View full textAdd to dashboardCite

“…could be enhanced to 10 À7 [2], and the branching fractions for B ! decays could be enhanced by 20% [8] in the presence of NP. We are not aware of branching fraction predictions for…”

“…þ are pure b ! d loop processes; the expected branching fractions for these modes range from ð2-7Þ Â 10 À8 [5][6][7][8][9]. The presence of new physics (NP) would give rise to additional amplitudes that could enhance the branching fractions for these decay modes relative to the SM predictions [2,3,6].…”