Measurements of SU(3) f symmetry breaking in B meson decay constants

De La Motte, SA, Hollitt, SE, Horsley, R, Jackson, PD, Nakamura, Y, Perlt, H, Pleiter, D, Rakow, PEL ORCID: 0000-0003-4486-2158, Schierholz, G, Stüben, H
et al (show 2 more authors) (2022) Measurements of SU(3) f symmetry breaking in B meson decay constants. .

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We present updates from QCDSF/UKQCD/CSSM on the SU(3) f breaking in B meson decay constants. The b-quarks are generated with an anisotropic clover-improved action, and are tuned to match properties of the physical B and B∗ mesons. Configurations are generated with m = 1/3(2ml + ms) kept constant to control symmetry breaking effects. Various sources of systematic uncertainty will be discussed, including those from continuum extrapolations and extrapolations to the physical point. We also present new efforts to calculate fB and fBs using weighted averages across multiple time fitting regions. The use of an automated weighted averaging technique over multiple fitting ranges allows for timely tuning of the b-quark and reduces the impact of systematic errors from fitting range biases in calculations of fB and fBs.

Item Type: Conference or Workshop Item (Unspecified)
Divisions: Faculty of Science and Engineering > School of Physical Sciences
Depositing User: Symplectic Admin
Date Deposited: 13 Sep 2022 15:10
Last Modified: 18 Jan 2023 20:41
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