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Searching for exotic states in the N(pi)K system.

Authors: K.P. Khemchandani, A. Martinez Torres, E. Oset

Ref.: Phys.Lett.B 675, 407 (2009)

Abstract: We study the $N pi K$ system in order to investigate the possibility of existence of strangeness +1 resonance(s). The formalism consists of solving the Faddeev equations with the $N pi$, $pi K $ and $K N$ $t$-matrices obtained from chiral dynamics. The same formalism, which leads to the finding of several $1/2^+$ resonances in the corresponding three-body $S$ = -1 channels in the 1400-2000 MeV energy region, results into only one broad bump around 1700 MeV with isospin 0. The amplitudes in isospin 1 and 2 configuration do not have any resonant structure.