Phenomenological studies on the B0d,s→J/ψf0(500)[f0(980)] decays.

Encouraged by the global agreement between theoretical predictions and experimental measurements for B→J/ψV decays, we extend that perturbative QCD formalism to B0d,s→J/ψf0(500)[f0(980)] decays at the presently known next-to-leading order in the quark-antiquark description of f0(500) and f0(980). With the angle ϕf≈25° of the f0(500)-f0(980) mixing in the quark-flavor basis, we find that the branching ratios of the B0d→J/ψf0(500)(→π+π-) and B0d,s→J/ψf0(980)(→π+π-) modes generally agree with the current data or the upper limits within uncertainties, except for the seemingly challenging B0s→J/ψf0(500)(→π+π-) one. Then, we further explore the relevant observables of the B0d,s→J/ψf0(500)[f0(980)] decays, which could provide further constraints on the mixing angle ϕf and/or SU(3) flavor symmetry breaking effects. As a byproduct, we predict BR(B0d→J/ψf0(980)(→K+K-))=5.8+3.1-2.9×10-7 and BR(B0s→J/ψf0(980)(→K+K-))=4.6+2.6-2.3×10-5. All theoretical predictions await the future examinations with high precision. [ABSTRACT FROM AUTHOR]