PoS - Proceedings of Science
Volume 256 - 34th annual International Symposium on Lattice Field Theory (LATTICE2016) - Weak Decay and Matrix Elements
Extraction of the bare form factors for the semi-leptonic $B_s$ decays
M. Koren,* F. Bahr, D. Banerjee, H. Simma, R. Sommer
*corresponding author
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Pre-published on: January 04, 2017
Published on: March 24, 2017
Abstract
The computation of the form factors for the $B_s\to K\ell\nu$ decay is presented. The b quark is treated by means of Heavy Quark Effective Theory, currently in the static approximation. In these proceedings we discuss the extraction of the bare matrix elements from lattice data through a combined fit to two- and three-point correlation functions, as well as by considering suitable ratios. The different methods agree concerning the extracted form factors and approximately 2% accuracy is reached. The non-perturbative renormalization and matching to QCD is described in accompanying proceedings [PoS(LATTICE2016) 292].
DOI: https://doi.org/10.22323/1.256.0295
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