The Gradient Flow in QCD and other Strongly Coupled Field Theories

Abstract

The gradient flow field transformation is a continuous smoothing transformation that removes ultraviolet fluctuations. It can serve as a tool to renormalize quantum field theories, allowing numerical studies of strongly coupled systems. The flow has been used extensively in lattice gauge theory calculations, both in QCD and in beyond  the  standard  model  settings  for  applications including scale setting, the determination of the running coupling constant and the corresponding renormalization group beta function, and the topological structure of the vacuum. Many of the newly emerging applications of the gradient flow depend on the perturbative connection of the gradient flow and continuum renormalization schemes,  requiring  difficult  perturbative  calculations  that match the non-perturbative lattice methods. This workshop will bring together experts in lattice and perturbative QCD to discuss recent progress in the application of the gradient flow, develop common ideas, identify needs and possibilities for the gradient flow and to spark collaborative efforts.

Main Topics

• Perturbative approach
• Non-perturbative renormalization
• Electric dipole moments
• Flavor physics
• Conformal systems
• BSM physics

Key speakers

* Nora Brambilla (Munich) - HQET/NRQCD, high temperature QCD * Luigi DelDebbio (Edinburgh) - Lattice QCD, QCD phenomenology * Partick Fritsch (Dublin) - Lattice QCD *  Pilar  Hernandez (Valencia) - BSM models, perturbative QCD * Fabian Lange (Karlsruhe) - High order perturbation theory [confirmed] * Maria-Paola Lombardo (INFN) - HQET/NRQCD, high temperature QCD * Julius Kuti (San Diego) - BSM theories on the lattice * Tobias Neumann (BNL) - High order perturbation theory * Daniel Nogradi (Budapest) - Lattice QCD, BSM models on the lattice * Antonio Rago (Plymouth, CERN) - Lattice QCD, BSM models on the lattice * Alberto Ramos (Valencia) - Lattice QCD * Kari Rummakainen (Helsinki) - BSM models on the lattice * Andrea Shindler (Michigan State University) - Lattice QCD, QCD phenomenology [confirmed] * Gerrit Schierholz (DESY) – Lattice QCD, QCD phenomenology [confirmed] * Stefan Sint (Trinity College Dublin) - Lattice QCD * Hiroshi Suzuki (Fukuoka) - Lattice QCD, BSM models on the lattice

Organizing Committee

Christopher Monahan (William & Mary, United States)
Robert Harlander (Aachen University, Germany)
Anna Hasenfratz (University of Colorado, Boulder, United States)
Oliver Witzel (Siegen University, Germany)