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High-precision lattice QCD confronts experiment |
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| Authors: | Davies C T H Follana E Gray A Lepage G P Mason Q Nobes M Shigemitsu J Trottier H D Wingate M Aubin C Bernard C Burch T DeTar C Gottlieb Steven Gregory E B Heller U M Hetrick J E Osborn J Sugar R Toussaint D Di Pierro M El-Khadra A Kronfeld A S Mackenzie P B Menscher D Simone J |
| Institution: | Department of Physics and Astronomy, University of Glasgow, Glasgow, United Kingdom. |
| Abstract: | The recently developed Symanzik-improved staggered-quark discretization allows unquenched lattice-QCD simulations with much smaller (and more realistic) quark masses than previously possible. To test this formalism, we compare experiment with a variety of nonperturbative calculations in QCD drawn from a restricted set of "gold-plated" quantities. We find agreement to within statistical and systematic errors of 3% or less. We discuss the implications for phenomenology and, in particular, for heavy-quark physics. |
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