HQET form factors for Bs → Klv decays beyond leading order
John von Neumann Institute for Computing (NIC), DESY, Platanenallee 6, D-15738 Zeuthen, Germany
* Speaker, e-mail: firstname.lastname@example.org
Published online: 26 March 2018
We compute semi-leptonic Bs decay form factors using Heavy Quark Effective Theory on the lattice. To obtain good control of the 1 /mb expansion, one has to take into account not only the leading static order but also the terms arising at O (1/mb): kinetic, spin and current insertions. We show results for these terms calculated through the ratio method, using our prior results for the static order. After combining them with non-perturbative HQET parameters they can be continuum-extrapolated to give the QCD form factor correct up to O (1/) corrections and without O (αs(mb)n) corrections.
© The Authors, published by EDP Sciences, 2018
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