I've read several posts here where people talk about the history of the developement of the theory of strong interactions. And they mention Regge theory, pomerons, S-matrix and so on.
I'm confused because I see the S-matrix in my QFT books, while wikipedia says: " it was a proposal for replacing QFT..."? What?
Also in the article on Pomeron wikipedia says that it is still used and that pomeron carries no charge etc...?
Are pomerons real?
My question is whether there are any serious competitors to QCD today?
Perhaps I should split this into several question, but I don't know.
I would like to get an overview of the history of the development of the theory of strong interactions from someone neutral, but that's too much to ask for I guess.
See for instance @Ron Maimon's reply to this question.