content_image/307268.jpg content_image/307269.jpg content_image/307270.jpg content_image/307271.jpg content_image/307272.jpg content_image/307273.jpg content_image/307274.jpg content_image/307275.jpg
We will need the following dot products: 

With these in hand we have that 

<img src='content_image/307268.jpg'>

<img src='content_image/307269.jpg'>

<img src='content_image/307270.jpg'>

<img src='content_image/307271.jpg'>

<img src='content_image/307272.jpg'>

<img src='content_image/307273.jpg'>

where the final relation comes from k ≪ xE + due to eikonality, Eq. (E.10). 

So 

<img src='content_image/307274.jpg'>

<img src='content_image/307275.jpg'>

(E.37) 

