Improvement of heavy-heavy current for calculation of B̅ → D(*)lv̅ form factors using Oktay-Kronfeld heavy quarks
Lattice Gauge Theory Research Center, CTP, Department of Physics and Astronomy, Seoul National University, Seoul 08826, South Korea
2 Los Alamos National Laboratory, Theoretical Division T-2, Los Alamos, New Mexico 87545, USA
3 Brookhaven National Laboratory, Department of Physics, Upton, New York 11973, USA
* e-mail: firstname.lastname@example.org
Published online: 26 March 2018
The CKM matrix element |Vcb| can be extracted by combining data from experiments with lattice QCD results for the semileptonic form factors for the B̅ → D(*)lv̅ decays. The Oktay-Kronfeld (OK) action was designed to reduce heavy-quark discretization errors to below 1%, or through O(λ3) in HQET power counting. Here we describe recent progress on bottom-to-charm currents improved to the same order in HQET as the OK action, and correct formerly reported results of our matching calculations, in which the operator basis was incomplete.
© The Authors, published by EDP Sciences, 2018
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