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Standard Model parameters and observables from gradient flow

12–15 May 2026
James Clerk Maxwell Building
Europe/London timezone

Contribution List

34 out of 34 displayed
  1. 2. Greetings
    Matthew Black (University of Edinburgh), Curtis Peterson, Jorge Dasilva
    12/05/2026, 08:45
  2. 38. Gradient flow in perturbation theory
    Robert Harlander
    12/05/2026, 09:00
    Invited Talk

    I will give an overview of methods, tools, and applications of the gradient-flow formalism at higher orders in perturbation theory.

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  3. 65. Gradient-flowed operator product expansion of the Adler function without IR renormalons
    Martin Beneke
    12/05/2026, 10:00

    A long-standing problem concerns the question how to consistently combine perturbative expansions in QCD with power corrections in the context of the operator product expansion (OPE), since the former exhibit ambiguities due to infrared renormalons, which are of the same order as the power corrections. We propose to use the gradient flow time 1/\sqrt{t} as a hard factorization scale and to...

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  4. 40. Quark mass effects in flowed action density
    Robert Mason (RWTH Aachen University)
    12/05/2026, 11:00
    Invited Talk

    The gradient flow provides a consistent scheme for matching perturbation theory and lattice field theory. In the continuum this has typically been done with the simplifying assumption that quarks are massless. However, this neither reflects lattice computations nor physical reality. In this talk we discuss the computation of three quantities fundamental to the gradient flow, the vacuum...

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  5. 4. The SFTX of LEFT
    Oscar Lara Crosas
    12/05/2026, 11:30
  6. 13. The perturbative matching of four-quark operators between gradient flow and MSbar
    Jonas Kohnen
    12/05/2026, 12:00
  7. 14. Lattice determination of bag parameters using gradient flow
    Antonio Rago
    12/05/2026, 12:30
  8. 8. Discussion Session
    12/05/2026, 14:30
  9. 52. The perturbative Ricci flow
    Henry Werthenbach (TTK, RWTH Aachen University, 52056 Aachen, Germany)
    12/05/2026, 16:00
    Submitted Talk

    One candidate for a quantum theory of gravity is the Asymptotic Safety conjecture, which postulates the existence of a non-trivial fixed point for the gravitational couplings. We investigate the search for such a fixed point within the framework of perturbation theory.

    For this, we employ the Ricci flow as the central tool, pursuing a perturbative scheme analogous to the gradient flow...

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  10. 11. Lattice Gradient Flow
    Anna Hasenfratz
    13/05/2026, 09:00
  11. 12. Quark masses using SFTX
    Oliver Witzel
    13/05/2026, 10:00
  12. 5. A new approach to quark masses using gradient flow
    Fabian Lange
    13/05/2026, 11:00
  13. 6. Quark masses
    Akhil Chauhan (University of Illinois Urbana Champaign)
    13/05/2026, 11:30
    Invited Talk
  14. 16. Discussion Session
    13/05/2026, 12:00
  15. 32. Higgs Centre Colloquium -- Demystifying lattice QCD computations of alpha_s
    Martin Luscher
    13/05/2026, 14:30
    Invited Talk

    Lattice QCD permits the strong coupling constant $\alpha_s$ to be determined from the masses and decay constants of the light hadrons. The precision achieved in these computations is competitive with the one of the world average of the experimental measurements of the coupling and is likely to improve in the coming years. In this colloquium, the aim is to explain, in terms that do not assume...

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  16. 22. The running coupling
    Alberto Ramos
    13/05/2026, 16:00
  17. 21. Anomalous dimensions
    Nathan Mackey (University of Colorado Boulder)
    14/05/2026, 09:30
    Invited Talk
  18. 19. Lattice Determination of Lambda_QCD
    Chik Him Wong
    14/05/2026, 10:00

    In recent years, gradient flow has been utilized in lattice simulations to determine Lambda QCD . In this talk, we discuss our results at Nf=3 massless fermions, and briefly outline our plan to proceed to the physical point.

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  19. 59. Classically perfect gradient flow
    Urs Wenger (University of Bern)
    14/05/2026, 11:00
    Submitted Talk

    Classically perfect fixed-point lattice actions preserve continuum classical properties while reducing lattice artifacts at the quantum level. They allow the extraction of continuum physics from coarser lattices and hence provide an effective way to overcome the challenges of critical slowing down and topological freezing as the continuum limit is approached. In this talk we show that...

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  20. 46. Adjoint chromoelectric correlators with lattice QCD
    Julian Mayer-Steudte (Technical University of Munich)
    14/05/2026, 11:30
    Submitted Talk

    In various effective field theory descriptions, adjoint chromoelectric correlators play a crucial role. At finite temperatures, these correlators are linked to the diffusion of heavy quarks and quarkonium, which are important for modeling non-equilibrium dynamics. At zero temperature, the correlator is used in the pNRQCD framework to describe inclusive decays of quarkonium. However, to achieve...

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  21. 58. Gradient flow scale setting with the pion decay constant in QCD+QED
    Alessandro Cotellucci
    14/05/2026, 12:00
    Submitted Talk

    We present the latest determination of the gradient flow scale $w_{0}$ from the BMW Collaboration. The value of $w_{0}$ is determined from the pion decay constant $f_{\pi}$ using QCD ensembles with tree-level improved Lüscher-Weisz gauge action and N$_{f}$=2+1+1 4stout staggered quarks at the physical point. We use multiple lattice spacings, ranging from $0.11$ to $0.048$ fm, to extrapolate to...

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  22. 60. Scale setting in finite-temperature QCD via gradient-flow rescaling
    Andrea Giorgieri (University of Pisa)
    14/05/2026, 12:30
    Submitted Talk

    We discuss how to set the scale of finite-temperature lattice QCD via step-scaling. In practice, starting from a reference lattice with known scale, we want to tune the bare coupling and quark masses of a second lattice so that its lattice spacing is a chosen fraction of the reference one, while quark masses and temperature are fixed in physical units, up to lattice artifacts. This can be...

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  23. 26. Discussion Session
    14/05/2026, 14:30
  24. 20. Lambda
    Yash Mandlecha
    14/05/2026, 16:00
  25. 54. Extracting the gluon momentum fraction of the nucleon via the gradient flow
    Chris Monahan (Colorado College)
    15/05/2026, 09:00

    The gluon momentum fraction of the nucleon is a key measure of hadronic structure. It characterises the average hadron momentum carried by gluons and is directly related to the energy-momentum tensor, which is central to the origin of mass in quantum chromodynamics (QCD). I report on a recent calculation [arXiv:2602.14260] by the HadStruc Collaboration that uses the gradient flow as a novel...

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  26. 15. Pion PDFs / EDM
    Andrea Shindler
    15/05/2026, 09:30
  27. 56. Lattice Study of the Pion Vector Form Factor in the Instanton Liquid Model Using Gradient Flow
    Vaibhav Chahar (Jagiellonian University)
    15/05/2026, 10:00
    Submitted Talk

    Instanton liquid model is believed to capture the main features of vacuum QCD dynamics. Recently, multiple predictions for hadron structure functions have been derived and compared with experimental measurements and lattice QCD calculations, finding a general agreement. In order to explore the precision of the instanton liquid model, one has to compare its predictions with non-perturbative...

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  28. 57. Renormalization Constants of the Effective Electroweak Hamiltonian via Flowed Fermion Fields
    Lukas Holan (Humboldt University of Berlin)
    15/05/2026, 11:00
    Submitted Talk

    Non-perturbative determinations of renormalization coefficients are an integral part of the continuum limit of lattice calculations. We explore an alternative strategy of determining the renormalization constants of the effective electroweak Hamiltonian. The method uses composite operators at positive flow time as probes together with finite axial Ward identities to resolve the mixing due to...

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  29. 53. Isospin-breaking corrections to the tau decay-rate
    Erik Bäske (Humboldt Universität zu Berlin)
    15/05/2026, 11:30
    Submitted Talk

    The inclusion of isospin-breaking corrections is necessary for high precision measurements of hadronic observables. One such observable with phenomenological relevance is the tau decay-rate, which is connected to the CKM-matrix elements. The isospin-symmetry is broken by both the interaction of the quarks with the photon and their mass differences. In the following we would like to present one...

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  30. 44. A non-perturbative definition of Magnetostatic QCD
    Dr Guilherme Catumba (University Milano-Bicocca)
    15/05/2026, 12:00
    Submitted Talk

    High-temperature QCD can be described, through dimensional reduction,
    by a 3D effective field theory. Electrostatic QCD consists of a
    gauged-scalar theory, while magnetostatic QCD of a pure 3D gauge
    theory. The use of dimensionally reduced effective theories to
    predict 4D observables relies on the matching between the 3D and 4D
    theories, which is known only perturbatively, and is thought...

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  31. 61. Smoothing properties of the gradient flow at large $N_c$
    Sofie Martins (University of Graz)
    15/05/2026, 12:30
    Submitted Talk

    Tunnelling between distinct topological sectors, described by instantons, plays a central role in understanding decorrelation in lattice gauge theory simulations. The gradient flow allows the smoothing of gauge configurations and, hence, the precise examination of these topological features. In this presentation, we systematically analyse the discretisation effects on topological quantities...

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  32. 33. Discussion Session
    15/05/2026, 14:30
  33. 51. The gradient flow coupling of three- and four-dimensional QED
    Lars Georg (TTK RWTH Aachen University)
    15/05/2026, 16:00
    Submitted Talk

    Connecting low-energy lattice results to high-energy continuum calculations is highly nontrivial, as they rely on fundamentally different regularizations. The gradient flow offers an elegant way to bridge this gap, since it can be implemented both on the lattice and in the continuum and naturally defines renormalized couplings and observables.

    While the GF up to now has found most of its...

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  34. 27. Renormalons
    Martin Beneke