Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10721966 | Physics Letters B | 2011 | 4 Pages |
Abstract
Ordinary matter is described by six fundamental parameters: three couplings (gravitational, electromagnetic and strong) and three masses: the electronʼs (me) and those of the up (mu) and down (md) quarks. An additional mass enters through quantum fluctuations: the strange quark mass (ms). The three couplings and me are known with an accuracy of better than a few per mil. Despite their importance, mu, md (their average mud) and ms are far less accurately known. Here we determine them with a precision below 2% by performing ab initio lattice quantum chromodynamics (QCD) calculations, in which all systematics are controlled. We use pion and quark masses down to (and even below) their physical values, lattice sizes of up to 6 fm, and five lattice spacings to extrapolate to continuum spacetime. All necessary renormalizations are performed nonperturbatively.
Keywords
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Nuclear and High Energy Physics
Authors
Budapest-Marseille-Wuppertal Collaboration Budapest-Marseille-Wuppertal Collaboration, S. Durr, Z. Fodor, C. Hoelbling, S.D. Katz, S. Krieg, T. Kurth, L. Lellouch, T. Lippert, K.K. Szabo, G. Vulvert,