Generalized parton distributions of sea quark at zero skewness in the light-cone model

Abstract

We study the chiral-even generalized parton distributions (GPDs) of {bar{u}} and {bar{d}} quarks at zero skewness using the overlap representation within the light cone formalism. The GPDs of {bar{u}} and {bar{d}} quarks can be expressed as the convolution of the light cone wave functions which are obtained from the baryon-meson fluctuation model in terms of the |q{bar{q}}Brangle Fock states. We present the numerical results for H^{{bar{u}}/P}(x,xi ,Delta ^2), H^{{bar{d}}/P}(x,xi ,Delta ^2), E^{{bar{u}}/P}(x,xi ,Delta ^2) and E^{{bar{d}}/P}(x,xi ,Delta ^2). We apply the model resulting GPDs to calculate the orbital angular momentum of the {bar{u}} and {bar{d}} quarks, showing that L^{{bar{u}}/P}, L^{{bar{d}}/P} are positive and L^{{bar{u}}/P} is smaller than L^{{bar{d}}/P}. The sea quark OAM distributions in the impact parameter space L_{{bar{q}}}(x,{varvec{b}}_{varvec{T}}) are also calculated.