Precision $Υ$ Spectroscopy and Fundamental Parameters From NRQCD
We present results from a high precision NRQCD simulation of the quenched $Υ$ system at $β= 6$. We demonstrate a variety of important lattice techniques, including the perturbative improvement of actions, tadpole improvement, and multicorrelated fits for extracting the spectrum of excited states. We present new determinations of $α_s(M_Z)$ and $M_b$, two fundamental parameters of the Standard Model.
hep-lat↗