Strong isospin violation and chiral logarithms in the baryon spectrum

David A. Brantley, Balint Joo, Ekaterina V. Mastropas +4

We present a precise lattice QCD calculation of the contribution to the neutron-proton mass splitting arising from strong isospin breaking, $m_n-m_p{|}_{QCD}=2.32\pm 0.17$ MeV. We als…