Isospin symmetry breaking and the neutron-proton mass difference

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.

Arguments detailed. Two references added. Version to appear in Physical Review C. DOI:10.1103/PhysRevC.00.005200

References in corpus (4)

• The Electromagnetic Self-Energy Contribution to M_p - M_n and the Isovector Nucleon Magnetic Polarizability
• Strange quark mass from Finite Energy QCD sum rules to five loops
• Determination of QCD condensates from tau-decay data
• Up and down quark masses from Finite Energy QCD sum rules to five loops

Cited by in corpus (4)

• Isospin splittings in the light baryon octet from lattice QCD and QED
• Electromagnetic proton-neutron mass difference
• New Sum Rule Determination of the Mass and Strangeness Content of the Nucleon
• Classic Calculations of Static Properties of the Nucleons reexamined