Understanding Electroweak Couplings of the Pion as a qq¯ Composite

A. N. Mitra, A. Pagnamenta, and N. -N. Singh
Phys. Rev. Lett. 59, 2408 – Published 23 November 1987
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Abstract

Three basic pionic amplitudes fπ+, Fπ (for π0γγ), and F3π (for πγππ) are calculated in a QCD-oriented Bethe-Salpeter model of qq¯ hadrons which fits the spectra of all quarkonia. The results, fπ+=157 MeV (experiment, 135), Γ(π0γγ)=8.03 eV (7.9), and F3π=12.7 GeV3 (13±2), obtained with no free parameters, agree with the data and with the Wess-Zumino-Witten theory.

  • Received 30 April 1987

DOI:https://doi.org/10.1103/PhysRevLett.59.2408

©1987 American Physical Society

Authors & Affiliations

A. N. Mitra, A. Pagnamenta, and N. -N. Singh*

  • Department of Physics, University of Illinois at Chicago, Chicago, Illinois 60680

  • *Present and permanent address: Department of Physics, University of Delhi, Delhi-110007, India.

Comments & Replies

Comment on ‘‘Understanding electroweak couplings of the pion as a qq¯ composite’’

Chueng-Ryong Ji and Stephen R. Cotanch
Phys. Rev. Lett. 64, 1848 (1990)

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Vol. 59, Iss. 21 — 23 November 1987

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