Violations of Dashen's Theorem

Details Violations of Dashen's Theorem Violations of Dashen's Theorem

1993-02-04

arxiv.org/abs/hep-ph/9302217v2

Phys.Lett. B306 (1993) 343-349

Physics

High Energy Physics

High Energy Physics - Phenomenology

Revised version, Latex, 10 pages, 4 figures, 2 included, NORDITA 93/15 N,P. Numerical mistake in evaluation of long-distance c

Scientific paper

10.1016/0370-2693(93)90089-Z

The electromagnetic contribution to the $K^+ - K^0$ mass difference is calculated in the $1/N_c$ approach including the $SU(3)$ breaking contributions due to a non-zero strange quark mass. The short-distance contribution can be unambiguously determined in terms of the known parameters of the next-to-leading order chiral lagrangian. The long distance part is estimated using the $1/N_c$ approach by Bardeen et al. Relatively large corrections are found.

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