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## Appendix E Standard pQCD Results 

## E.1 Light Cone Coordinates 

## E.1.1 Definitions; Identities 

A four-vector is not bold-faced (e.g. p , k ), a three-vector is bold-faced with a vector symbol (e.g. ⃗ p , ⃗ k ), and a transverse two-vector is bold-faced with- out a vector symbol (e.g. p , k ). Minkowski four-vectors are written with parentheses, (); light-cone four-vectors with brackets, []. 

We will use non-symmetrized lightcone coordinates: 

<img src='content_image/296036.jpg'>

<img src='content_image/296037.jpg'>

<img src='content_image/296038.jpg'>

<img src='content_image/296039.jpg'>

