Is the up quark massless?

2001/10/15 by Daniel R. Nelson, Daniel Nelson, George T. Fleming +3 · 1 citation
Physics and Astronomy · #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #Quantum and Classical Electrodynamics #hep-lat

paper · pdf · doi:10.1016/s0920-5632(01)01669-3

published as Nucl.Phys.Proc.Suppl.106:221-223,2002 · 3 pages, 3 figures, uses espcrc2.sty, Lattice2001(spectrum)

arxiv created 2001/10/15 · openalex publication_date 2002/03/01 · arxiv updated 2011/02/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

Several lattice calculations of a combination of the low energy constants of the chiral Lagrangian, 2α₈-α₅, are presented. This combination is critical for the preclusion of a massless up quark. The result found is 2α₈-α₅ = 0.115 ± 0.051^stat ± 0.25^syst, which is well outside of the range allowed by a massless up quark.

Citations

• Effective chiral Lagrangians and lattice QCD

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