| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1853633 | Physics Letters B | 2008 | 5 Pages |
Abstract
We evaluate lower bounds on the sum of the up and down quark masses. The bounds follow from the constraints provided by the dispersion relation obeyed by the two-point function of the scalar current density when combined with properties of the scalar spectral function at long-distances and perturbative QCD at short-distances. Our results point to values of mu+md somewhat higher than those reported recently in the literature using lattice QCD simulations.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Nuclear and High Energy Physics
Authors
Alexandre Dominguez-Clarimon, Eduardo de Rafael, Josep Taron,