Laser-assisted decay of charged mesons into leptonic modes

The two-body leptonic decays of both light and heavy-charged mesons \(X_{l2}^{\pm }\) $X_{l2}^{\pm }$ are investigated in the first Born approximation in the presence of a monochromatic and circularly polarized laser field. As a result of using Volkov functions, the analytic study of these processes has brought a change in the parameters associated with each decay process. The decay width, lifetime, and branching ratio of each decay process are affected by increasing the classical parameter \(\xi\) $\xi$ of the meson. A comparison between the matter decay \(X^{+}_{l2}\) $X_{l2}^{+}$ and that of the anti-matter \(X^{-}_{l2}\) $X_{l2}^{-}$ in the presence of a circularly polarized laser wave, indicates that increasing laser field strength (increasing the classical parameter \(\xi\) $\xi$ ) can induce a slight dominance of matter over antimatter or vise versa.