993 citations · 7.4k across the 80 of their papers we have counts for
81 papers
Positivity and renormalization of parton densities
John Collins, Ted C. Rogers, Nobuo Sato
There have been recent debates about whether parton densities exactly obey positivity bounds (including the Soffer bound), and whether the bounds should be a…
A new and complete proof of the Landau condition for pinch singularities of Feynman graphs and other integrals
John Collins
The Landau equations give a physically useful criterion for how singularities arise in Feynman amplitudes. Furthermore, they are fundamental to the uses of perturbative QCD, by det…
A new approach to the LSZ reduction formula
John Collins
Lehmann, Symanzik and Zimmermann (LSZ) proved a theorem showing how to obtain the S-matrix from time-ordered Green functions. Their result, the reduction formula, is fundamental to…
The non-triviality of the vacuum in light-front quantization: An elementary treatment
John Collins
It is often stated that the vacuum is trivial when light-front (null-plane) quantization is applied to a quantum field theory, in contrast to the situation with equal-time quantiza…
Graphical Structure of Hadronization and Factorization in Hard Collisions
John Collins, Ted C. Rogers
Models of hadronization of hard jets in QCD are often presented in terms of Feynman-graph structures that can be thought of as effective field theory approximations to dynamical no…
Connecting Different TMD Factorization Formalisms in QCD
John Collins, Ted C. Rogers
In the original Collins-Soper-Sterman (CSS) presentation of the results of transverse-momentum-dependent (TMD) factorization for the Drell-Yan process, results for perturbative coe…