Strong-Isospin Breaking in the Neutron-Proton Mass Difference
| dc.creator | Savage, Martin J. | |
| dc.date | 2006-08-30 | |
| dc.date.accessioned | 2026-07-07T10:41:14Z | |
| dc.date.available | 2026-07-07T10:41:14Z | |
| dc.description | We determine the strong-isospin violating component of the neutron-proton mass difference from fully-dynamical lattice QCD and partially-quenched QCD calculations of the nucleon mass, constrained by partially-quenched chiral perturbation theory at one-loop level. The lattice calculations were performed with domain-wall valence quarks on MILC lattices with rooted staggered sea-quarks at a lattice spacing of b ~ 0.125 fm, lattice spatial size of L~2.5 fm and pion masses ranging from m_pi~290 MeV to ~350 MeV. At the physical value of the pion mass, we predict M_n - M_p |(d-u) = 2.26 +- 0.57 +- 0.42 +- 0.10 MeV where the first error is statistical, the second error is due to the uncertainty in the ratio of light-quark masses, eta=m_u/m_d, determined by MILC, and the third error is an estimate of the systematic due to chiral extrapolation. | |
| dc.description | 7 pages, 2 figs. Talk given at 24th International Symposium on Lattice Field Theory: Lattice 2006, Tucson, Arizona, 23-28 July 2006 | |
| dc.identifier | https://arxiv.org/abs/hep-lat/0608023 | |
| dc.identifier | http://arxiv.org/abs/hep-lat/0608023 | |
| dc.identifier | PoSLAT2006:198,2006 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/181564 | |
| dc.subject | High Energy Physics - Lattice | |
| dc.title | Strong-Isospin Breaking in the Neutron-Proton Mass Difference | |
| dc.type | text |