content_image/340431.jpg content_image/340432.jpg content_image/340433.jpg content_image/340434.jpg content_image/340435.jpg content_image/340436.jpg
Thus 

<img src='content_image/340431.jpg'>

These formal series can be summed exactly as for the case of singlet electric and magnetic quark GPDs. The form of the resulting expression actually differs only by a factor 1 $_{3}$. The expressions for gluon electric and magnetic elementary amplitudes read 

<img src='content_image/340432.jpg'>

<img src='content_image/340433.jpg'>

We introduce electric and magnetic gluon GPD quint-essence functions: 

<img src='content_image/340434.jpg'>

The imaginary parts of gluon electric and magnetic elementary amplitudes then read: 

<img src='content_image/340435.jpg'>

<img src='content_image/340436.jpg'>

