2019/12/20 by J. M. Flynn, Flynn, Jonathan, Ryan C. Hill +10
Engineering · Medicine · Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Lattice (hep-lat) #Medical Imaging Techniques and Applications #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #Superconducting Materials and Applications
paper · pdf · doi:10.48550/arxiv.1912.09946
openalex publication_date 2019/12/20 · openalex created_date 2022/07/19 · openalex updated_date 2026/07/28
We present updates for our nonperturbative lattice QCD calculations to\ndetermine semileptonic form factors for exclusive B\→ \π\ℓ\ν, B\→ D\n\ℓ\ν, Bs\→ K\ℓ \ν, and Bs\→ Ds\ℓ\ν decays. Our calculation\nis based on RBC-UKQCD's set of 2+1-dynamical-flavor gauge field ensembles. In\nthe valence sector we use domain wall fermions for up/down, strange and charm\nquarks, whereas bottom quarks are simulated with the relativistic heavy quark\naction. The continuum limit is based on three lattice spacings. Using\nkinematical z expansions we aim to obtain form factors over the full q2\nrange. These form factors are the basis for predicting ratios addressing lepton\nflavor universality or, when combined with experimental results, to obtain CKM\nmatrix elements |Vub| and |Vcb|.\n