Pion-pair production from γγ interactions at PEP and the radiative width of the fo meson

A. Courau, R. P. Johnson, S. S. Sherman, W. B. Atwood, P. H. Baillon, B. C. Barish, G. R. Bonneaud, G. J. Donaldson, R. Dubois, M. M. Duro, E. E. Elsen, S. G. Gao, Y. Z. Huang, G. M. Irwin, H. Kichimi, J. Kirkby, D. E. Klem, D. E. Koop, J. Ludwig, G. B. MillsA. Ogawa, T. Pal, D. Perret-Gallix, R. Pitthan, D. L. Pollard, C. Y. Prescott, L. Z. Rivkin, L. S. Rochester, W. Ruckstuhl, M. Sakuda, E. J. Siskind, R. Stroynowski, S. Q. Wang, S. G. Wojcicki, H. Yamamoto, W. G. Yan, C. C. Young

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22 Citations (Scopus)


Results are presented of an untagged e+e- → e+e- + π+π- experiment performed at PEP with the DELCO detector. In the invariant-mass range 0.7 ≤ Wππ < 2.0 GeV/c2, the QED e+e- background is identified and eliminated, and both the π+π- predictions and the μ+μ- and K+K- background substractions are normalized to the measurement of the e e+e- events. The results agree with a simple model of superposition and interference of the f0 (1270) resonance, produced with helicity 2, with a Born-term continuum. From a fit of the model to the data, the radiative width of the f0 is determined to be Γf 0→γγ = 2.70 ± 0.21 keV.

Original languageEnglish
Pages (from-to)227-231
Number of pages5
JournalPhysics Letters B
Issue number1-3
Publication statusPublished - Nov 1 1984
Externally publishedYes

ASJC Scopus subject areas

  • Nuclear and High Energy Physics


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