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Gradient Flow Renormalization Schemes for Composite Fermion Operators
Matthew Black, Anna Hasenfratz, Oliver Witzel
We introduce gradient flow (GF) normalization prescriptions for fermionic composite operators in which the flowed fermion wavefunction renormalization factor is fixed nonperturbati…
Heavy-Meson Bag Parameters using Gradient Flow
Matthew Black, Robert V. Harlander, Jonas T. Kohnen +4
We demonstrate the use of the gradient flow combined with the short flow-time expansion (GF+SFTX) as a renormalization procedure for four-quark operator matrix elements and associa…
Extracting form factors
Anastasia Boushmelev, Matthew Black, Oliver Witzel
Semileptonic decays are of great phenomenological interest because they allow to determine e.g. CKM matrix elements or test lepton flavor universality. Taking advantage o…
Renormalized quark masses using gradient flow
Matthew Black, Robert V. Harlander, Anna Hasenfratz +2
We propose a new and simple method for determining the renormalized quark masses from lattice simulations. Renormalized quark masses are an important input to many phenomenological…
Form factors for semileptonic B(s) -> D*(s) l nu_l decays
Anastasia Boushmelev, Matthew Black, Oliver Witzel
Semileptonic decays are of great phenomenological interest because they allow to extract CKM matrix elements or test lepton flavour universality. Taking advantage of exis…
Gradient Flow Renormalisation for Meson Mixing and Lifetimes
Matthew Black, Robert Harlander, Fabian Lange +3
Fermionic gradient flow in combination with the short-flow-time expansion provides a computational method where the renormalisation of hadronic matrix elements on the lattice can b…
Using Gradient Flow to Renormalise Matrix Elements for Meson Mixing and Lifetimes
Matthew Black, Robert Harlander, Fabian Lange +3
Neutral meson mixing and meson lifetimes are theory-side parametrised in terms four-quark operators which can be determined by calculating weak decay matrix elements using lattice…