Reparametrization invariant collinear operators
Author(s)Marcantonini, Claudio; Stewart, Iain
MetadataShow full item record
In constructing collinear operators, which describe the production of energetic jets or energetic hadrons, important constraints are provided by reparametrization invariance (RPI). RPI encodes Lorentz invariance in a power expansion about a collinear direction, and connects the Wilson coefficients of operators at different orders in this expansion to all orders in αs. We construct reparametrization invariant collinear objects. The expansion of operators built from these objects provides an efficient way of deriving RPI relations and finding a minimal basis of operators, particularly when one has an observable with multiple collinear directions and/or soft particles. Complete basis of operators is constructed for pure glue currents at twist-4, and for operators with multiple collinear directions, including those appearing in e+e-→3 jets, and for pp→2 jets initiated via gluon fusion.
DepartmentMassachusetts Institute of Technology. Center for Theoretical Physics; Massachusetts Institute of Technology. Department of Physics
Physical Review D
American Physical Society
Marcantonini, Claudio , and Iain W. Stewart. “Reparametrization invariant collinear operators.” Physical Review D 79.6 (2009): 065028. © 2009 The American Physical Society.
Final published version