Measurements of $SU(3)_f$ symmetry breaking in B meson decay constants
| Autor: | Hollitt, Sophie, De La Motte, Shanette, Horsley, Roger, Jackson, Paul Douglas, Nakamura, Yoshifumi, Perlt, Holger, Pleiter, Dirk, Rakow, P. E. L., Schierholz, Gerrit, Stuben, Hinnerk, Young, R. D., Zanotti, James |
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| Rok vydání: | 2022 |
| Předmět: |
High Energy Physics::Lattice
High Energy Physics::Phenomenology High Energy Physics - Lattice (hep-lat) FOS: Physical sciences anisotropy effect [symmetry breaking] decay [meson] High Energy Physics - Lattice meson: decay symmetry breaking: effect multiple [time] SU(3) High Energy Physics::Experiment ddc:530 time: multiple |
| Zdroj: | Proceedings of Science / International School for Advanced Studies (LATTICE2021), 549 (2022). doi:10.22323/1.396.0549 38th International Symposium on Lattice Field Theory, LATTICE2021, Online, United States, 2021-07-26-2021-07-30 |
| DOI: | 10.3204/PUBDB-2022-00330 |
| Popis: | 38th International Symposium on Lattice Field Theory, LATTICE2021, Online, United States, 26 Jul 2021 - 30 Jul 2021; Proceedings of Science / International School for Advanced Studies (LATTICE2021), 549 (2022). doi:10.22323/1.396.0549 We present updates from UKQCD/QCDSF/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 $\overline{m}=(2m_l+m_s)/3$ 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 $f_B$ and $f_{B_s}$ 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 $f_B$ and $f_{B_s}$ Published by SISSA, Trieste |
| Databáze: | OpenAIRE |
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