Nonfactorizable contributions inBdecays to charmonium: The case ofB−→K−hc

Abstract

Nonleptonic B to charmonium decays generally show deviations from the factorization predictions. For example, the mode B Ϫ →K Ϫ c0 has been experimentally observed with a sizable branching fraction while its factorized amplitude vanishes. We investigate the role of rescattering effects mediated by intermediate charmed meson production in this class of decay modes, and consider B Ϫ →K Ϫ h c with h c the J PC ϭ1 ϩϪ c c meson. Using an effective Lagrangian describing interactions of pairs of heavy-light Qq mesons with a quarkonium state, we relate this mode to the analogous mode with c0 in the final state. We find B(B Ϫ →K Ϫ h c ) large enough to be measured at B factories, so that this decay mode could be used to study the poorly known h c .

Understanding and in the invariant mass spectrum

“…7 where g 3 = √ m ψ /f ψ and g 2 = √ m ψ /(2m D f ψ ) with f J/ψ = 405 ± 14 MeV, λ = 0.56 GeV −1 , ζ = 0.727 and ̟ = 0.364 [21,23]. For the two photon decay,…”

“…Now we make an analysis about the decays of B + to X/Y s. The leading order of the weak decay can be described as a four-quark local interaction by the effective Hamiltonian [23,26] as shown in Fig. 6,…”

Novel analysis of the decaysψ′→hcπ0andηc′→χGuo1, Hanhart2, Li3 et al. 2010Phys. Rev. D548400View full textAdd to dashboardCite

“…In Ref. [36], the authors estimated g 1 using vector meson dominance, which gives g 1 = −4.2 GeV −1/2 . Using these values, the resulting width Γ(ψ ′ → h c π 0 ) loop ≃ 1 × 10 −5 keV.…”

“…[36] in fourcomponent notation. The values of the coupling constants g 1 and g 2 in that paper are half of those introduced here.…”

Polarizations in decaysBu,d→VVand possible implications forR-parity violating supersymmetry

“…Some important results from BABAR and Belle collaboration on the B decays to two light vector mesons B → V V [1,2,3,4,5,6,7,8,9] have caught considerable theoretical interests and have been extensively studied very recently [10,11,12,13,14,15,16].…”