Is the Z^+(4430) a radially excited state of D_s?

TL;DR

This paper proposes that the Z^+(4430) particle is a radially excited state of the D_s meson, supported by mass calculations and decay mode analysis, providing a potential explanation for its observed properties.

Contribution

The study offers a novel interpretation of Z^+(4430) as a radially excited cs-bar state, supported by mass predictions and decay mode reasoning within a quark potential model.

Findings

Mass calculation matches the observed Z^+(4430) mass.

Decay mode analysis explains the absence of Z-> J/psi + decay.

Supports Z^+(4430) as a radially excited D_s state.

Abstract

We present the interpretation that the recently discovered Z^+(4430) by the Belle Collaboration can be a radial excitation of the cs-bar state. We give an explicit cs-bar candidate for this state by calculating the mass value in our semirelativistic quark potential model and also give a natural interpretation on the reason why the decay mode Z-> J/\psi \pi^+ has not yet been seen while Z-> \psi' \pi can be seen.