Hadronic Matrix Elements and the pi+ pi0 Mass Difference

Bardeen, William A.;Bijnens, J.;Gérard, Jean-Marc
(1989) Physical Review Letters — Vol. 62, n° 12, p. 1343-1346 (1989)

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  • Bardeen, William A.Fermilab
    Author
  • Bijnens, J.Munich U.
    Author
  • Gérard, Jean-MarcUCLouvain
    Author
Abstract
We estimate the π+-π0 electromagnetic mass difference within the 1/N expansion approach to hadronic matrix elements. Perturbative QCD and a truncated meson theory describe the high- and low-photon-loop-momentum contributions, respectively. The matching between these complementary pictures for strong interactions is discussed.
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Bardeen, W. A., Bijnens, J., & Gérard, J.-M. (1989). Hadronic Matrix Elements and the pi+ pi0 Mass Difference. Physical Review Letters, 62(12), 1343-1346. https://doi.org/10.1103/PhysRevLett.62.1343 (Original work published 1989)