Variable flavor number scheme for multiscale processes in QCD
by
Piotr Pietrulewicz(DESY)
→
Europe/Berlin
semiar room 2, building 2A (DESY Hamburg)
semiar room 2, building 2A
DESY Hamburg
Description
Heavy quark effects play a significant role in the precise description
of many collider processes, but are usually both conceptually and
technically quite involved. I will show how to systematically include
higher order effects from secondary massive quark radiation in QCD
processes with various dynamical scales. The resulting mass
factorization theorems resum all large logarithms and can account for
arbitrary hierarchies between the mass scale and the kinematic scales.
The main concepts will be illustrated using the examples of the hadronic
R-ratio, deep-inelastic scattering and event shapes in e+ e- collisions.
