The effect of off-diagonal parton distributions in diffractive vector meson electroproduction
Abstract
We present a simple physical description of the off-diagonal gluon distribution g (x,x,Q2) and splitting function Pgg(x,x) which enter the amplitude for diffractive vector meson production. We study the off-diagonal effects both on the evolution in Q2 and on the input distribution. We predict the ratio R of the off-diagonal to the diagonal gluon density, x g(x,x,Q2)/xg(x, Q2), as a function of the kinematic variables.
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