Abstract
We study the Dalitz plot of the decay with a sample of 15090 events from Fermilab experiment E791. Modeling the decay amplitude as the coherent sum of known resonances and a uniform nonresonant term, we do not obtain an acceptable fit. If we allow the mass and width of the to float, we obtain values consistent with those from PDG but the per degree of freedom of the fit is still unsatisfactory. A good fit is found when we allow for the presence of an additional scalar resonance, with mass and width . The mass and width of the become and , respectively. Our results provide new information on the scalar sector in hadron spectroscopy.
- Received 12 April 2002
DOI:https://doi.org/10.1103/PhysRevLett.89.121801
©2002 American Physical Society