The Q^2 dependence of the helicity amplitudes for the Roper resonance as a hybrid state is presented.Our study shows that the magnitude of the transverse helicity amplitude decreases rapidly as Q^2 increases, while the longitudinal helicity amplitude vanishes for the hybrid state.This feature is quite different from the prediction of the q^3 potential quark model, in which the Roper resonance is assumed to be an orbitally excited state.The comparison with data shows that the hybrid interpretation of the Roper is favoured.Future experiments at CEBAF can provide the information needed to definitely determine the spin-flavour content of this resonance
The amplitudes of the transition gamma* N -> P11(1440) are calculated within light-front relativisti...
A parameter-free evaluation of the $N - P_{11}(1440)$ electromagnetic transition form factors is per...
The lightest nucleon resonances are described at light front as mixed states of the 3q cluster (“qua...
The helicity amplitudes of the electroexcitation of the Roper resonance are extracted for 1.7 N(144...
The helicity amplitudes of the electroexcitation of the Roper resonance are extracted for 1.7<Q2&...
The helicity amplitudes of the electroexcitation of the Roper resonance are extracted for 1.7 \u3c Q...
The helicity amplitudes of the electroexcitation of the Roper resonance are extracted for 1.
A description of the Roper using the chiral chromodielectric model is presented and the transverse $...
The Roper resonance is described in a chiral version of the chromodielectric model as a cluster of t...
The helicity amplitudes of the electroexcitation of the Roper resonance are extracted for 1.
peer reviewedWithin a semi-relativistic constituent quark model based on linear confinement, we prop...
AbstractThe Roper resonance is described in a chiral version of the chromodielectric model as a clus...
The Roper state is described in the framework of the chiral chromodielectric model as a single quark...
In view of the recent results of lattice QCD simulation in the P11 partial wave that has found no cl...
The Roper resonance is described in a chiral version of the chromodielectric model as a cluster of t...
The amplitudes of the transition gamma* N -> P11(1440) are calculated within light-front relativisti...
A parameter-free evaluation of the $N - P_{11}(1440)$ electromagnetic transition form factors is per...
The lightest nucleon resonances are described at light front as mixed states of the 3q cluster (“qua...
The helicity amplitudes of the electroexcitation of the Roper resonance are extracted for 1.7 N(144...
The helicity amplitudes of the electroexcitation of the Roper resonance are extracted for 1.7<Q2&...
The helicity amplitudes of the electroexcitation of the Roper resonance are extracted for 1.7 \u3c Q...
The helicity amplitudes of the electroexcitation of the Roper resonance are extracted for 1.
A description of the Roper using the chiral chromodielectric model is presented and the transverse $...
The Roper resonance is described in a chiral version of the chromodielectric model as a cluster of t...
The helicity amplitudes of the electroexcitation of the Roper resonance are extracted for 1.
peer reviewedWithin a semi-relativistic constituent quark model based on linear confinement, we prop...
AbstractThe Roper resonance is described in a chiral version of the chromodielectric model as a clus...
The Roper state is described in the framework of the chiral chromodielectric model as a single quark...
In view of the recent results of lattice QCD simulation in the P11 partial wave that has found no cl...
The Roper resonance is described in a chiral version of the chromodielectric model as a cluster of t...
The amplitudes of the transition gamma* N -> P11(1440) are calculated within light-front relativisti...
A parameter-free evaluation of the $N - P_{11}(1440)$ electromagnetic transition form factors is per...
The lightest nucleon resonances are described at light front as mixed states of the 3q cluster (“qua...