Branching fraction of the isospin violating process phi to omega pi0

TL;DR

This paper analyzes the e+e- -> omega pi0 cross section near the phi resonance to determine the phi -> omega pi0 branching fraction, revealing two possible solutions with significantly different values.

Contribution

It introduces a new parametrization method for the cross section and identifies two potential solutions for the isospin violating branching fraction.

Findings

Two solutions for the branching fraction: 4×10^{-5} and 7×10^{-3}

The higher solution is two orders of magnitude larger than the accepted value

The analysis challenges previous assumptions about the branching fraction

Abstract

We examine the parametrization of the e+e- -> omega pi0 cross section in the vicinity of the phi resonance and the extraction of the branching fraction of the isospin violating process phi -> omega pi0 from experimental data. We found that there are two possible solutions of the branching fraction, one is 4 times 10^{-5}, and the other is 7 times 10^{-3}. The latter is two orders of magnitude higher than the former, which is the commonly accepted one.