Factorization and resummation for massive quark effects in exclusive Drell-Yan

Apr 13, 2016, 11:30 AM
20m
SR1 (DESY, Hamburg)

SR1

DESY, Hamburg

QCD and Hadronic Final States WG2 QCD and Hadronic Final States

Speaker

Piotr Pietrulewicz (DESY)

Description

Exclusive 0-jet processes at hadron colliders are nowadays studied at an unprecedented precision in theory and experiment. Within the framework of Soft-Collinear Effective Theory we discuss how to incorporate massive bottom quark effects in the resummed cross section for Drell-Yan, where as specific examples for a measured exclusive observable we consider the transverse momentum of the electroweak boson and beam thrust. At NNLL' order, i.e. including matrix elements at O(alphas^2) and NNLL resummation, one has to account for both heavy quark initiated (primary) corrections to the hard scattering process as well as secondary radiation effects. The theoretical description depends on the hierarchy between the involved scales, ranging from the decoupling limit for large masses to the massless limit for small masses, and involves quark mass dependent beam functions/TMDs and soft functions in between.

Primary authors

Anne Spiering (HU Berlin) Daniel Samitz (University of Vienna) Frank Tackmann (DESY) Piotr Pietrulewicz (DESY)

Presentation materials