Branching fraction of the isospin violating process phi to omega pi0

Understand

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.