Maxim V. Polyakov

Nucleon form factors from generalized parton distributions

We discuss the links between Generalized Parton Distributions (GPDs) and elastic nucleon form factors. These links, in the form of sum rules, represent powerful constraints on parametrizations of GPDs. A Regge parametrization for GPDs at small momentum transfer, is extended to the large momentum transfer region and it is found to describe the basic features of proton and neutron electromagnetic form factor data. This parametrization is used to estimate the quark contribution to the nucleon spin.

Off - forward quark distributions of the nucleon in the large N(c) limit

We study the off-forward quark distributions (OFQDs) in the chiral quark-soliton model of the nucleon. This model is based on the large-

Nonstrange and other flavor partners of the exoticΘ+baryon

{N}_{c}

Unpolarized and polarized quark distributions in the large N(c) limit

picture of the nucleon as a soliton of the effective chiral Lagrangian and allows one to calculate the leading twist quark and antiquark distributions at a low normalization point. We demonstrate the consistency of the approach by checking various sum rules for the OFQDs. We present numerical estimates of the isosinglet distribution

Exotic and nonexotic magnetic transitions in the context of the SELEX and GRAAL experiments

H(x,\ensuremath{\xi},{\ensuremath{\Delta}}^{2})

Narrow Nucleon-

. In contrast with other approaches we find a strong qualitative dependence on the longitudinal momentum transfer,

\psi(2S)

\ensuremath{\xi}

Bound State and LHCb Pentaquarks

. In particular,

The Generalized parton distribution function (E**u + E**d)(x,xi,t) of the nucleon in the chiral quark soliton model

H(x,\ensuremath{\xi},{\ensuremath{\Delta}}^{2})

Effective chiral Lagrangian from dual resonance models.

as a function of