Manchester Particle Physics Seminars, Colloquia and Meetings

Andrea Banfi: Taming two-scale jet observables with ARES

Friday, 24 January 2020 from to (Europe/London)
at Schuster ( 54-6-6.40 - Niels Bohr Common Room )
In high energy collisions displaying hadronic jets, many
interesting observables are characterised by the presence of two widely
separated energy scales. A typical example is the production of on object
with a large invariance mass, with a tight cut on accompanying jets. For
such observables, fixed-order QCD calculations break down due to the
appearance of large logarithms of the ratio of the two scales. The Automated
Resummer for Event Shapes (ARES) is a novel framework designed to resum such
logarithms to all orders in QCD for a generic suitable two-scale observable.
Besides its phenomenological applications, the ARES method has interesting
theoretical implications, in that it involves the definition of a new
effective coupling for strong interactions.