Dispersive analysis of omega --> 3pi and phi --> 3pi decays

Details Dispersive analysis of omega --> 3pi and phi --> 3pi decays Dispersive analysis of omega --> 3pi and phi --> 3pi decays

2012-03-12

arxiv.org/abs/1203.2501v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

22 pages, 18 figures

Scientific paper

We study the three-pion decays of the lightest isoscalar vector mesons, omega and phi, in a dispersive framework that allows for a consistent description of final-state interactions between all three pions. Our results are solely dependent on the phenomenological input for the pion-pion P-wave scattering phase shift. We predict the Dalitz plot distributions for both decays and compare our findings to recent measurements of the phi --> 3pi Dalitz plot by the KLOE and CMD-2 collaborations. Dalitz plot parameters for future precision measurements of omega --> 3pi are predicted. We also calculate the pi-pi P-wave inelasticity contribution from omega-pi intermediate states.

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