arXiv:hep-lat/0110112·v1·High Energy Physics — Lattice
Is the Up Quark Massless?
Daniel R. Nelson (1)🇺🇸 · George T. Fleming (1)🇺🇸 · Greg W. Kilcup (1) ((1) The Ohio State University)🇺🇸
Abstract
Several lattice calculations of a combination of the low energy constants of the chiral Lagrangian, 2\alpha_8-\alpha_5, are presented. This combination is critical for the preclusion of a massless up quark. The result found is 2\alpha_8-\alpha_5 = 0.115 \pm 0.051^{stat} \pm 0.25^{syst}, which is well outside of the range allowed by a massless up quark.
Comments: 3 pages, 3 figures, uses espcrc2.sty, Lattice2001(spectrum)