Analysis of the vertices BsBK* and DsDK* with QCD Sum Rules

37th Brazilian Meeting on Nuclear Physics

Cerqueira, A.^1 ; Rodrigues, B Osório^2 ; Bracco, M.E.^3

Centro Universitário de Volta Redonda, UniFOA, Av. Paulo Erlei Alves Abrantes 1325, Volta Redonda, RJ

27240-560, Brazil^1

Centro Brasileiro de Pesquisas Físicas, Rua Xavier Sigaud 150, Rio de Janeiro, RJ

22290-180, Brazil^2

Faculdade de Tecnologia, Universidade Do Estado Do Rio de Janeiro, Rod. Presidente Dutra Km 298, Pólo Industrial, Resende, RJ

27537-000, Brazil^3

关键词: Chiral perturbation theory;    Coupling constants;    D-mesons;    Form factors;    QCD sum rules;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/630/1/012034/pdf
DOI  :  10.1088/1742-6596/630/1/012034

来源: IOP

【 摘 要 】

In this work, we calculated the form factors and coupling constant of the vertex DsDK∗ using the QCD Sum Rules. The calculation of the form factors were performed for the cases D, Dsand K∗ off shell. Using the similarities between B and D mesons, we also calculated the form factors and coupling constant of the vertex BsBK∗. The coupling constants of the vertices BsBK∗ and DsDK∗ were compared with each other through the Heavy Hadron Chiral Perturbation Theory(HHChPT). We found a difference of 19% between BsBK∗ and DsDK∗ coupling constants using the HHChPT relation.