URL: https://physikseminar.desy.de/zeuthen/past_colloquia/colloquia_in_2009/may_6_2009/@@siteview
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Hadron Spectrum from Lattice QCD
Zoltán Fodor (Bergische Universität Wuppertal)
Seminar Room 3, 15:00
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-electron volts 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.
