Khemchandani, K. P.; Martínez Torres, Alberto; Oset Báguena, Eulogio Perfil  
This document is a artículoDate2008  
Este documento está disponible también en : http://hdl.handle.net/10550/46889 

We study the ππN system by solving the Faddeev equations, for which the input twobody tmatrices are obtained by solving the BetheSalpeter equation in the coupled channel formalism. The potentials for the ππ, πN subsystems and their coupled channels are obtained from chiral Lagrangians, which have been earlier used to study resonances in these systems successfully. In this work, we find a resonance in the ππN system with a mass of 1704−i375/2 MeV and with quantum numbers I=1/2, Jπ=1/2+. We identify this state with the N∗(1710). This peak is found where the energies of the ππ subsystem fall in the region of the σ resonance. We do not find evidence for the Roper resonance in our study indicating a more complex structure for this resonance, nor for any state with total isospin I=3/2 or 5/2.  
Khemchandani, K. P. Martínez Torres, Alberto Oset Báguena, Eulogio 2008 The N*(1710) as a resonance in the pi pi N system European Physical Journal A 37 2 233 243 

http://dx.doi.org/10.1140/epja/i2008106253 