## Abstract

We study the Dalitz plot of the decay [Formula presented] with a sample of 15090 events from Fermilab experiment E791. Modeling the decay amplitude as the coherent sum of known [Formula presented] resonances and a uniform nonresonant term, we do not obtain an acceptable fit. If we allow the mass and width of the [Formula presented] to float, we obtain values consistent with those from PDG but the [Formula presented] 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 [Formula presented] and width [Formula presented]. The mass and width of the [Formula presented] become [Formula presented] and [Formula presented], respectively. Our results provide new information on the scalar sector in hadron spectroscopy.

Original language | English |
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Journal | Physical Review Letters |

Volume | 89 |

Issue number | 12 |

DOIs | |

State | Published - 2002 |