Spectrum of Charmonia within a Contact Interaction

30th Annual Meeting of the Division of Particles and Fields (DPyC) of the Mexican Physical Society

Bedolla, Marco Antonio^1

Instituto de Fsica y Matemticas, Universidad Michoacana de San Nicolás de Hidalgo, Ciudad Universitaria, Edificio C-3, Michoacán, Morelia

C.P. 58040, Mexico^1

关键词: Axial vector;    Bethe-Salpeter equation;    Contact interaction;    Decay constants;    Dyson equations;    Heavy-quark;    Model calculations;    Spin-spin;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/761/1/012071/pdf
DOI  :  10.1088/1742-6596/761/1/012071

来源: IOP

【 摘 要 】

For the flavour-singlet heavy quark system of charmonia, we compute the masses of the ground state mesons in four different channels: pseudo-scalar (ηc(1S)), vector (J/ψ(1S)), scalar (χs0(1P)) and axial vector (χc1(1P)), as well as the weak decay constants of the ηc(1S) and J/ψ(1S). The framework for this analysis is provided by a symmetry-preserving Schwinger- Dyson equation (SDEs) treatment of a vector x vector contact interaction (CI). The results found for the meson masses and the weak decay constants, for the spin-spin combinations studied, are in fairly good agreement with experimental data and earlier model calculations based upon Schwinger-Dyson and Bethe-Salpeter equations (BSEs) involving sophisticated interaction kernels.