2024/11/26 by Yi Zhang, W. S. Cheng, Zhang, Yi +9
Physics and Astronomy · #Physics of Superconductivity and Magnetism #Quantum Chromodynamics and Particle Interactions #Particle physics theoretical and experimental studies
paper · pdf · doi:10.48550/arxiv.2411.17228
In this paper, we investigate the helicity form factors (HFFs) of the B(s)-meson decay into a scalar meson with a mass larger than 1~GeV, \it i.e., B → a0(1450), B(s) → K0^*(1430) and Bs → f0(1500) by using light-cone sum rules approach. We take the standard currents for correlation functions. To enhance the precision of our calculations, we incorporate the next-to-leading order (NLO) corrections and retain the scalar meson twist-3 light-cone distribution amplitudes. Furthermore, we extend the HFFs to the entire physical q2 region employing a simplified z-series expansion. At the point of q2=1\rm~GeV2, all NLO contributions to the HFFs are negative, with the maximum contribution around 25%. Then, as applications of these HFFs, we analyze the differential decay widths, branching ratios, and lepton polarization asymmetries for the semi-leptonic B(s) → S ℓ ν_ℓ, FCNC B(s) → S ℓ ℓ and rare B(s) → S νν decays. Our results are consistent with existing studies within uncertainties. The current data still suffer from large uncertainties and need to be measured more precisely, which can lead to a better understanding of the fundamental properties of light scalar mesons.