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The Gradient Flow in QCD and other Strongly Coupled Field Theories

Mar 20 – 24, 2023
ECT*
Europe/Rome timezone

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Contribution List

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  1. 30. Staff | Registration
    3/20/23, 9:20 AM
  2. 20. Selected results on renormalization and O(a) improvement
    Andrea Shindler (Michigan State University, East Lansing/US)
    3/20/23, 10:00 AM
  3. 13. The gradient flow formulation of the electroweak Hamiltonian
    Fabian Lange (Karlsruhe Institute of Technology)
    3/20/23, 11:00 AM
  4. 31. Welcome ECT* director Gert Aarts
    3/20/23, 2:00 PM
  5. 16. Using Gradient Flow to renormalise Matrix Elements for $B$ Meson Mixing and Lifetimes
    Matthew Black (University Siegen)
    3/20/23, 2:10 PM

    Neutral $B$ meson mixing and $B$ meson lifetimes are theory-side parametrised in terms of $\Delta B=2$ and 0 four-quark operators which can be determined by calculating weak decay matrix elements using lattice QCD.
    While calculations of $\Delta B=2$ mixing matrix elements are standard, matrix elements with $\Delta B=0$ for extracting lifetimes suffer from complications in standard...

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  6. 15. The Chromomagnetic Dipole Operator in the Gradient Flow
    Janosch Borgulat (RWTH Aachen)
    3/20/23, 2:40 PM

    The baryon asymmetry of the universe requires sources of CP-violation beyond those predicted by the SM. At the same time, experimental constraints on the neutron electric dipole moment leave a large window for CP-violating contributions beyond the SM. Such contributions can be described by CP-violating effective interactions at hadronic energies in QCD. Because of confinement, these...

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  7. 3. Gradient flow and topological properties of Quantum Chromodynamics
    Andrey Kotov
    3/20/23, 4:30 PM
  8. 29. Gradient flow exact renormalization group
    Prof. Hiroshi Suzuki
    3/21/23, 9:00 AM
  9. 8. Gradient Flow and Exact Renormalization Group
    Andrea Carosso (The George Washington University)
    3/21/23, 10:00 AM
  10. 2. The strong CP problem revisited using the gradient flow
    Gerrit Schierholz (DESY)
    3/21/23, 11:00 AM
  11. 22. From the chiral anomaly to the gradient-flow expression for the topological susceptibility
    Martin Lüscher (CERN)
    3/21/23, 2:00 PM
  12. 17. Heavy quark diffusion with gradient flow
    Viljami Leino (Johannes Gutenberg Universität Mainz)
    3/21/23, 4:30 PM
  13. 7. Gradient flow in nonrelativistic effective field theories
    Nora Brambilla (TU München, Germany)
    3/22/23, 9:00 AM
  14. 10. QCD Static force from the lattice with gradient flow
    Julian Mayer-Steudte (Technical University Munich)
    3/22/23, 10:00 AM

    Non-perturbative static force measurements on the lattice can be used to extract the QCD scale $\Lambda_\mathrm{QCD}$ by comparison to perturbative results. We measure the static force on the lattice directly. The corresponding observable consists of a Wilson loop with a discretized $E$-field insertion in one of the temporal Wilson lines. This causes discretization effects, which have to be...

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  15. 23. Selected aspects of the gradient flow in perturbation theory
    Robert Harlander (Aachen University, Germany)
    3/22/23, 11:00 AM
  16. 24. A novel nonperturbative renormalization scheme based on gradient flow
    Anna Hasenfratz (University of Colorado, Boulder, United States)
    3/22/23, 2:00 PM
  17. 19. Fixed point and anomalous dimensions in a Composite Higgs theory
    Benjamin Svetitsky (Tel Aviv University)
    3/22/23, 4:30 PM

    We have applied the gradient flow to an SU(4) gauge theory with two sets of fermions in separate gauge representations. We have a clean result for the beta function of the theory up to and beyond an infrared fixed point. Using the fermion GF we have obtained anomalous dimensions for mesonic operators and for the chimera operators that are needed for top quark mixing. We were able to reach...

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  18. 18. On the approach of smeared and gradient flow observables to the continuum llimit
    Rainer Sommer (DESY & Humboldt University)
    3/23/23, 9:00 AM
  19. 6. QCD static force in gradient flow
    Xiangpeng Wang (Technical University of Munich)
    3/23/23, 10:00 AM
  20. 11. Toward new gradient flow based lattice determination of the strong QCD coupling at the Z-pole
    Julius Kuti (U.C. San Diego)
    3/23/23, 11:00 AM

    A lattice implementation is described for the beta-function defined over infinite Euclidean space-time in the continuum. It is based on scale changes of the renormalized gauge coupling generated by infinitesimal or finite steps on the gradient flow. Harlander and Neumann calculated in this scheme the three-loop approximation to the continuum beta-function. Our goal is the nonperturbative...

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  21. 14. Lambda-parameter of the SU(3) Yang-Mills theory from the continuous beta-function
    Curtis Peterson (University of Colorado Boulder)
    3/23/23, 2:00 PM
  22. 28. Use of the gradient flow in matching the QED 2+1 Hamiltonian and Lagrangian
    Simone Romiti (Uni-Bonn)
    3/23/23, 2:30 PM
  23. 26. Studying the Vacuum structure of Yang-Mills using the gradient flow
    Ivan Soler (Friedrich-Schiller University of Jena)
    3/23/23, 4:30 PM
  24. 21. Gradient Flow and Machine Learning
    Luigi Del Debbio (The University of Edinburgh)
    3/24/23, 9:00 AM
  25. 9. Computation of relativistic corrections to the static potential from generalized Wilson loops at finite flow time
    Michael Eichberg
    3/24/23, 10:00 AM