Charm meson couplings in hard-wall Holographic QCD

TL;DR

This paper uses hard-wall holographic QCD to calculate meson couplings, masses, and decay constants, comparing results with experimental data and other theoretical approaches, providing insights into charm meson interactions.

Contribution

The study introduces a comprehensive holographic QCD framework for evaluating charm meson couplings, masses, and decay constants, with detailed comparisons to experimental and other theoretical results.

Findings

Calculated meson coupling constants and decay constants.

Estimated masses of various charm and light mesons.

Results agree with experimental data and other theoretical models.

Abstract

The four-flavor hard-wall holographic QCD is studied to evaluate the couplings of $(D^{_{-(*-)}}, \bar{D}^{_0}, a_1^{_-})$, $(D^{_{-(*-)}}, \bar{D}^{_0}, b_1^{_-})$, $(D_{s}^{_{-(*-)}},\bar{D}^{_0}, K_{1A}^{_-})$, $(D_s^{_{-(*-)}}, \bar{D}^{_0}, K_{1B}^{_{-(*-)}})$, $(D_s^{_{+(*+)}}, D^{_+}, K_{1A}^{_0})$, $(D_s^{_{+(*+)}}, D^{_+}, K_{1B}^{_0})$, $(D^{_{-(*-)}}, \bar{D}^{_{0(*0)}}, \rho^{_-})$, $(D_s^{_{-(*-)}}, \bar{D}^{_{0(*0)}}, K^{_{*-}})$, $(D^{_{0(*0)}}, \bar{D}^{_{0(*0)}}, \psi)$, $(D_1^{_-}, \bar{D}_1^{_0}, \pi^{_-})$, $(D_{s1}^{_-}, \bar{D}_1^{_0}, K^{_{-}})$, $(D_1^{_0}, \bar{D}_1^{_0}, \eta_c)$, $(\psi, D^{_{0(*0)}}, D^{_+}, \pi^{_-})$, $(\psi, D^{_{0(*0)}}, \bar{D}^{_0}, \pi^{_0})$, $(\psi, D_{s}^{_{+(*+)}}, D^{_-}, K^{_0})$, $(\psi, D^{_{0(*0)}}, D^{_+}, a_1^{_-})$, $(\psi, D^{_{0(*0)}}, D^{_+}, b_1^{_-})$, $(\psi, D_s^{_{+(*+)}}, D^{_-}, K_{1B}^{_0})$ and $(\psi, D_s^{_{+(*+)}}, D^{_-}, K_{1B}^{_0})$ vertices. Moreover, the values of the masses of $D^{_{0(*0)}}$, $D_s^{_{-(*-)}}$, $\omega$, $\psi$, $D_1^{_0}$, $D_1^{_{-}}$, $K^0$, $\eta_{c}$, $D_{s1}^{_-}$ and $\chi_{_{c1}}$ as well as the decay constant of $\pi^-$, $D^{_{-(*-)}}$, $K^-$, $\rho^-$, $D_1^{_-}$ , $a_1^-$ and $D_s^{_{-(*-)}}$ are estimated in this study. A comparison is also made between our results and the experimental values of the masses and decay constants. Our results for strong couplings are also compared with the 3PSR and LCSR predictions.