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Lambda(1405) production in the pi-p -> K-0 pi Sigma reaction

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Lambda(1405) production in the pi-p -> K-0 pi Sigma reaction

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Oset Báguena, Eulogio; Hyodo, T.; Hosaka, Atsushi; Ramos Gómez, Àngels; Vicente Vacas, Manuel José

Aquest document és un/a article, creat/da en: 2003

We discuss the mechanisms that lead to Lambda(1405) production in the pi(-)p-->K(0)piSigma reaction. The problem has gained renewed interest after different works converge to the conclusion that there are two resonances around the region of 1400 MeV, rather than one, and that they couple differently to the piSigma and (K) over barN channels. We look at the dynamics of that reaction and find two mechanisms which eventually filter each one of the resonances, leading to very different shapes of the piSigma invariant mass distributions. The combination of the two mechanisms leads to a shape of this distribution compatible with the experimental measurements.

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