I'm currently doing some research at the moment for my professor, and he gave me a list of things to look at. Before he had me calculate the "real center of mass cross section." Now, starting at point 0 for publication, he's having me go through and do some other things. In his list of things to do, he talks about the "absolute cross section," and the "lab cross section." Is it safe to assume that all three of these are the same? All I knew about was the lab and center of mass, nothing about the real or the absolute. If not, is there any reference you guys have that explains the difference between them all? I haven't been able to find anything. Thanks in advanced!