Non-global logarithms in jet and isolation cone cross sections

Non-global logarithms in jet and isolation cone cross sections

Blog Article

Abstract Starting from a factorization theorem in effective field theory, we derive a parton-shower equation for the resummation of non-global logarithms.We have read more implemented this shower and interfaced it with a tree-level event generator to obtain an automated framework to resum the leading logarithm of non-global observables in the large-N c limit.Using this setup, we compute gap fractions for dijet processes and isolation cone cross sections relevant for photon production.We here compare our results with fixed-order computations and LHC measurements.We find that naive exponentiation is often not adequate, especially when the vetoed region is small, since non-global contributions are enhanced due to their dependence on the veto-region size.

Since our parton shower is derived from first principles and based on renormalization-group evolution, it is clear what ingredients will have to be included to perform resummations at subleading logarithmic accuracy in the future.