The unquenched Upsilon spectrum
UKQCD collaboration: L. Marcantonio, P. Boyle, C. T. H. Davies, J., Hein, J. Shigemitsu
TL;DR
This paper presents a study of the bottomonium spectrum using dynamical lattice QCD ensembles, compares it to quenched results, and determines the strong coupling constant and bottom quark mass from these simulations.
Contribution
It provides the first unquenched lattice QCD calculation of the Upsilon spectrum including determinations of alpha_s and m_b.
Findings
Unquenched results differ from quenched spectra.
Determined alpha_s and m_b from dynamical simulations.
Improved accuracy in bottomonium spectrum predictions.
Abstract
We describe the bottomonium spectrum obtained on the UKQCD dynamical ensembles and its comparison to quenched results. We include a determination of alpha_s and m_b from the dynmaical results.
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