content_image/343229.jpg content_image/343228.jpg content_image/343227.jpg content_image/343226.jpg content_image/343225.jpg
The real part of the elementary electric gluon amplitude is given by 

where D $^{g}$( t ) stands for the gluon D - form factor (51). Finally, the real part of the magnetic gluon amplitude reads: 

<img src='content_image/343229.jpg'>

<img src='content_image/343228.jpg'>

The gluon D -form factor is defined according to 

<img src='content_image/343227.jpg'>

where D $^{g}$( z, t ) stand for the gluon D -term for which the following Gegenbauer expansion was adopted in [3]: 

<img src='content_image/343226.jpg'>

According to the analysis presented in [33, 37], the real part of the elementary amplitude A g ( E ) can be expressed through its imaginary part with the help a dispersion relation with one subtraction in the variable ω = 1 ξ for the fixed value of t : 

<img src='content_image/343225.jpg'>

