Testing the Structure of the Scalar Meson $K_0^{\ast }(1430)$ in $\tau \to K_0^{\ast }(1430)\nu$ Decay

Abstract

The decay constant of $K_0^{\ast }(1430)$ is the key quantity to determine the production rate of $K_0^{\ast }(1430)$ in $\tau$ decays. By assuming $K_0^{\ast }(1430)$ is the lowest scalar bound state of $s\bar{q}$, the decay constant can be calculated reliably in QCD sum rule. Then the decay branching ratio of $\tau \to K_0^{\ast }(1430)\nu$ is predicted to be about $(7.9\pm 3.1)\times 10^{-5}$. If this branching ratio can be measured by experiment, it should be helpful to make clear the structure of $K_0^{\ast }(1430)$.

4 pages, Accepted for pubication in Mod. Phys. Lett. A

References in corpus (3)

• Big Bang Nucleosynthesis (in "The Review of Particle Properties" 2004)
• Mass and Decay Constant of $I=1/2$ Scalar Meson In QCD Sum Rule
• The Present Status on sigma and kappa Meson Properties

Cited by in corpus (3)

• Study of scalar meson $a_0(980)$ from $B\to a_0(980)\pi$ Decays
• Cabibbo-Kobayashi-Maskawa-favored $B$ decays to a scalar meson and a $D$ meson
• Study of $B_{u,d,s}\to K_0^{\ast }(1430)P$ and $K_0^{\ast }(1430)V$ decays within QCD factorization