Electromagnetic self-energies of the neutral pions: Contributions from vector resonances

Details Electromagnetic self-energies of the neutral pions: Contributions from vector resonances Electromagnetic self-energies of the neutral pions: Contributions from vector resonances

1999-09-25

arxiv.org/abs/hep-ph/9909511v1

Phys.Lett. B495 (2000) 69-73

Physics

High Energy Physics

High Energy Physics - Phenomenology

Revtex, 8 pages, no figures

Scientific paper

10.1016/S0370-2693(00)01175-8

By employing vector meson dominance to establish the electromagnetic interactions of hadrons, the electromagnetic self-energy of the neutral pions, which receives the contributions from the vector resonances due to chiral anomaly, is evaluated. This part of the electromagentic mass, which can contribute to the mass difference of $\pi^\pm-\pi^0$, is finite and as expected, is smaller than the contributions due to isospin symmetry breaking and electromagnetic chiral logs corrections, however, could be compared with the contribution from the short distance QCD.

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