A confirming evidence for two pseudoscalar states with masses M-1 = 1405 +/- 5, Gamma(1) = 50 +/- 4 MeV/c(2) and M-2 = 1500 +/- 10, Gamma(2) = 100 +/- 20 MeV/c(2) is reported. The second pseudoscalar fills the nonet and leaves the first as an outsider supporting the hypothesis for its exotic nature.
Evidence for two pseudoscalar states in the 1.4-1.5 GeV mass region
BALESTRA, Ferruccio;BOTTA, Elena;BRESSANI, Tullio;BUSSO, Luigi;COSTA, Sergio;FERRERO, Livio;GARFAGNINI, Raffaello;GRASSO, Antonino;MARCELLO, Simonetta;PANZIERI, Daniele;
1999-01-01
Abstract
A confirming evidence for two pseudoscalar states with masses M-1 = 1405 +/- 5, Gamma(1) = 50 +/- 4 MeV/c(2) and M-2 = 1500 +/- 10, Gamma(2) = 100 +/- 20 MeV/c(2) is reported. The second pseudoscalar fills the nonet and leaves the first as an outsider supporting the hypothesis for its exotic nature.
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