- Conference date: 25-30 Aug 1997
- Location: Upton, New York (USA)
A S-wave ππ resonance below 1 GeV/c2, sigma has been observed in analyses of the phase shift data of ππ scatterings. It is important to observe it in production processes. A huge events of below 1 GeV/c2 is seen in the central production of the GAMS experiment. Its mass spectrum is well described by the variant mass and width method (VMW) including and a S-wave resonance which might be assigned to be a sigma. We report here that the angular distributions of the system are also described with the S-wave resonance interfering with and the tail of by VMW. The same method is applied to the data of decay, and is shown that not only mass spectrum but also its distributions are described well.
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