Using the algebra of currents and the sum rules recently derived by Weinberg, we calculate the electromagnetic mass difference of pions and obtaim mπ+−mπ0≃5.0 MeV.
DOI:https://doi.org/10.1103/PhysRevLett.18.759
©1967 American Physical Society
T. Das*, G. S. Guralnik, and V. S. Mathur
F. E. Low
J. E. Young
Vol. 18, Iss. 18 — 1 May 1967
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