Sep 9 – 13, 2019
Europe/Zurich timezone

Violation of the Kluberg-Stern-Zuber theorem and operator mixing in SCET

Sep 11, 2019, 9:30 AM



Martin Beneke (Technische Universitaet Muenchen (DE))


A well-known result states that operators that vanish by the classical equation of motion do not mix into physical operators. The result guarantees that the S-matrix is invariant under large classes of field redefinitions. It is shown that (and why) the theorem is violated in soft-collinear effective theory beyond the leading power in the soft-collinear expansion. The mixing of eom operators into physical operators is computed at next-to-leading power (NLP), which completes the one-loop renomalization of NLP N-jet operators. It is explained how to deal with divergent collinear convolution integrals.

Primary authors

Martin Beneke (Technische Universitaet Muenchen (DE)) Mathias Garny (CERN) Robert Szafron (TU München) Jian Wang

Presentation materials