2025/05/21 by Wang, Ya-Xiong, Hu, Dan-Dan, Luo, Wan-Bing +2
#FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph)
paper · doi:10.48550/arxiv.2505.15014
The twist-2 distribution amplitude of the ϕ-meson has attracted considerable interest due to its unique properties. In this work, we construct the transverse leading-twist light-cone distribution amplitude ϕ2;ϕ^\bot(x,μ0) of the ϕ-meson using the light-cone harmonic oscillator model, in which a parameter B2;ϕ^\bot dominantly control its longitudinal distribution. To explicitly isolate different twist contributions, we employ the right-handed chiral correlator for the QCD light-cone sum rules calculation of Ds+→ϕ decays, and further, we get the branching fraction, B(Ds+ → ϕe+νe )= (2.271-0.243+0.291)× 10-2 and B(Ds+ → ϕμ+νμ)=(2.250-0.240+0.287)× 10-2, where errors are squared average of the mentioned error sources. Furthermore, we have extracted the Cabbibo-Kobayashi-Maskawa (CKM) matrix element |Vcs|=0.975-0.066+0.067 with improved precision through the analysis. Finally, we calculated the polarization parameter and asymmetry parameter for the Ds+→ϕ decays.