Dynamics of hadron strong production and decay

TL;DR

This paper extends lattice QCD results to analyze meson production and decay, providing new insights into axial meson decays, charmonium decay structures, and selection rules for specific processes.

Contribution

It generalizes lattice QCD findings to predict meson decay behaviors and introduces new selection rules and amplitude relations for heavy quarkonium production.

Findings

Predictions for exclusive decays of vector charmonia.

A selection rule forbidding certain $e^+e^- o D^* D_2$ processes.

Differences in amplitude relations between double charmonia and light flavor production.

Abstract

We generalize results of lattice QCD to determine the spin-dependent symmetries and factorization properties of meson production in OZI allowed processes. This explains some conjectures previously made in the literature about axial meson decays and gives predictions for exclusive decays of vector charmonia, including ways of establishing the structure of Y(4260) and Y(4325) from their S-wave decays. Factorization gives a selection rule which forbids $e^+e^- \to D^* D_2$ near threshold with the tensor meson in helicity 2. The relations among amplitudes for double charmonia production $\e^+e^-\to \psi\chi_{0,1,2}$ are expected to differ from the analagous relations among light flavour production such as $\e^+e^-\to \omega f_{0,1,2}$.