Experimental evidence for a light and broad scalar resonance in D+-> pi-pi+pi+ decay

AUTOR(ES)

Miranda, Jussara M. de

FONTE

Brazilian Journal of Physics

DATA DE PUBLICAÇÃO

2000-06

RESUMO

From a sample of 1240 ± 51 D+ ® pi- pi+ pi+ we find gamma(D+ -> pi- pi+ pi+)/gamma(D+ -> K- pi+ pi+) = 0:0329 ± 0:0015 . Using a coherent amplitude analysis to t the Dalitz plot of this decay, we find strong evidence that a scalar resonance of mass 483 ± 17 MeV/c² and width 338 ± 21 MeV/c² produces a decay fraction of approximately one half.

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