Physics – High Energy Physics – High Energy Physics - Lattice
Scientific paper
2006-08-30
PoSLAT2006:198,2006
Physics
High Energy Physics
High Energy Physics - Lattice
7 pages, 2 figs. Talk given at 24th International Symposium on Lattice Field Theory: Lattice 2006, Tucson, Arizona, 23-28 July
Scientific paper
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.
No associations
LandOfFree
Strong-Isospin Breaking in the Neutron-Proton Mass Difference does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Strong-Isospin Breaking in the Neutron-Proton Mass Difference, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Strong-Isospin Breaking in the Neutron-Proton Mass Difference will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-73963