engleski

The influence of pi N --> K Lambda data on the P11 poles

The mechanism of determining T-matrix pole position in pion-nucleon partial wave analyses by using the coupled channel formalism, presented elsewhere for the piN -> etaN channel, is applied for the piN -> KLambda channel, with the aim to clarify the issue whether physical reality requires none (VPI/GWU), one (KH80, CMB, Kent, Pittsburgh/ANL, Giessen), or possibly two (Zagreb) poles of the partial wave T-matrix in the 1700 MeV range.

coupled channel pion nucleon partial wave analysis; K Lambda production

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