I'm sorry if this is irrelevant in this community, but I am a graduate student in Cosmology in dire need of a QFT text. Which one do you guys use? (I have had one intro to QFT class where we were taught how to work with Feynman diagrams for tree-level QED calculations). From the library, I have a choice of Peskin/Schroeder, Roman, Zee and Bjorken/Drell.
Any suggestions will be welcome.
Again, if you think these posts are irrelevant here, please let me know.