title: Effective Field Theory for Jet Processes.
abstract: Processes involving narrow jets receive perturbative corrections enhanced by logarithms of the jet opening angle and the ratio of the energies inside and outside the jets. Analyzing cone-jet processes in effective field theory, we find that in addition to soft and collinear fields their description requires degrees of freedom that are simultaneously soft and collinear to the jets. These collinear-soft particles can resolve individual collinear partons, leading to a complicated multi-Wilson-line structure of the associated operators at higher orders. Our effective field theory provides, for the first time, a factorization formula for a cone-jet process, which fully separates the physics at different energy scales. Its renormalization-group equations control all logarithmically enhanced higher-order terms, in particular also the nonglobal logarithms.
authors.affiliation: Institut für Theoretische Physik & AEC, Universität Bern, Sidlerstrasse 5, CH-3012 Bern, Switzerland.
authors.forename: Thomas
authors.initials: T
authors.lastname: Becher
authors.affiliation: PRISMA Cluster of Excellence & MITP, Johannes Gutenberg University, 55099 Mainz, Germany.|Department of Physics, LEPP, Cornell University, Ithaca, New York 14853, USA.
authors.forename: Matthias
authors.initials: M
authors.lastname: Neubert
authors.affiliation: Institut für Theoretische Physik & AEC, Universität Bern, Sidlerstrasse 5, CH-3012 Bern, Switzerland.
authors.forename: Lorena
authors.initials: L
authors.lastname: Rothen
authors.affiliation: Institut für Theoretische Physik & AEC, Universität Bern, Sidlerstrasse 5, CH-3012 Bern, Switzerland.
authors.forename: Ding Yu
authors.initials: DY
authors.lastname: Shao