Friday, May 3, 2013

1207.0079 (Nasrallah F. Nasrallah)

Isospin symmetry breaking and the neutron-proton mass difference    [PDF]

Nasrallah F. Nasrallah
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>~ 2^2.
View original: http://arxiv.org/abs/1207.0079

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