Isospin symmetry breaking and the neutron-proton mass difference
High Energy Physics - Phenomenology
2015-06-05 v2
Abstract
QCD sum rules using polynomial kernels are used to evaluate the strong part of the proton-neutron mass difference DeltaM_np in a model independent fashion. The result for the mass difference turns out to depend sensitively on the value of the four quark condensate <(qq)^2> and reproduces the experimental value of DeltaM_np for <(qq)^2>~ 2<qq>^2.
Keywords
Cite
@article{arxiv.1207.0079,
title = {Isospin symmetry breaking and the neutron-proton mass difference},
author = {Nasrallah F. Nasrallah},
journal= {arXiv preprint arXiv:1207.0079},
year = {2015}
}
Comments
Arguments detailed. Two references added. Version to appear in Physical Review C. DOI:10.1103/PhysRevC.00.005200