Physics – High Energy Physics – High Energy Physics - Lattice
Scientific paper
2009-06-19
Science 322:1224-1227,2008
Physics
High Energy Physics
High Energy Physics - Lattice
22 pages, 3 Tables, 8 Figures. Published in Science (21 November 2008) with Supporting Online Material. Submission to arXiv ha
Scientific paper
10.1126/science.1163233
More than 99% of the mass of the visible universe is made up of protons and neutrons. Both particles are much heavier than their quark and gluon constituents, and the Standard Model of particle physics should explain this difference. We present a full ab-initio calculation of the masses of protons, neutrons and other light hadrons, using lattice quantum chromodynamics. Pion masses down to 190 mega electronvolts are used to extrapolate to the physical point with lattice sizes of approximately four times the inverse pion mass. Three lattice spacings are used for a continuum extrapolation. Our results completely agree with experimental observations and represent a quantitative confirmation of this aspect of the Standard Model with fully controlled uncertainties.
Dürr Stephan
Fodor Zoltan
Frison Julien
Hoelbling Christian
Hoffmann Roland
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