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Experimental evidence for a light and broad scalar resonance in D(+) --> pi(-)pi(+)pi(+) decay |
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| Authors: | Aitala E M Amato S Anjos J C Appel J A Ashery D Banerjee S Bediaga I Blaylock G Bracker S B Burchat P R Burnstein R A Carter T Carvalho H S Copty N K Cremaldi L M Darling C Denisenko K Devmal S Fernandez A Fox G F Gagnon P Gobel C Gounder K Halling A M Herrera G Hurvits G James C Kasper P A Kwan S Langs D C Leslie J Lundberg B Magnin J Massafferri A MayTal-Beck S Meadows B de Mello Neto J R Mihalcea D Milburn R H de Miranda J M Napier A Nguyen A d'Oliveira A B O'Shaughnessy K Peng K C Perera L P Purohit M V Quinn B Radeztsky S Rafatian A Reay N W Reidy J J dos Reis A C Rubin H A Sanders D A |
| Affiliation: | University of Mississippi-Oxford, 38677, USA. |
| Abstract: | From a sample of 1172 +/- 61 D(+)-->pi(-)pi(+)pi(+) decays, we find gamma(D(+)-->pi(-)pi(+)pi(+))/gamma(D(+)-->K-pi(+)pi(+)) = 0.0311 +/- 0.0018(+0.0016)(-0.0026). Using a coherent amplitude analysis to fit the Dalitz plot of these decays, we find strong evidence that a scalar resonance of mass 478(+24)(-23) +/- 17 MeV/c(2) and width 324(+42)(-40) +/- 21 MeV/c(2) accounts for approximately half of all decays. |
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