Refined analysis of $\Omega^{-} \bar{\Omega}^{+}$ polarization in electron-positron annihilation process
Abstract
We investigate the production of spin-3/2 hyperon pairs, , in electron-positron annihilation within the helicity amplitude formalism. A refined selection of helicity basis matrices is proposed to relate polarization expansion coefficients and spin density matrix elements and to illuminate their inherent physical interpretations and symmetrical properties. With a novel parametrization scheme of helicity amplitudes, we perform an analysis of polarization correlation coefficients for double-tag pairs. We present three sets of expressions to describe the decay of hyperons, and further address the existing tension in the measurements of its decay parameters, particularly . The method and the framework developed in this paper can also be applied to studies of the production and decay mechanisms of other spin-3/2 particles.
Keywords
Cite
@article{arxiv.2312.04363,
title = {Refined analysis of $\Omega^{-} \bar{\Omega}^{+}$ polarization in electron-positron annihilation process},
author = {Zhe Zhang and Jiao Jiao Song and Ya-jin Zhou},
journal= {arXiv preprint arXiv:2312.04363},
year = {2023}
}
Comments
43 pages, 4 figures