= Effective W approximation for proton:

'''Author : Xiaoran Zhao [https://cp3.irmp.ucl.ac.be/Members/xzhao email]

This is a code which will co-evolve the (anti-)quark PDF with Effective W approximation, to provide the effective W/Z boson PDF inside a proton.
The generated code can be adopted into Madgraph.
Note that Madgraph already includes a version of generated code, and thus this is only for some customizations on top of that(such as adopting different proton PDF).

The code and detailed documentation can be accessed through https://github.com/zxrlha/EWA_proton .