Electron-positron annihilation into hadron-antihadron pairs

Y. Yan, C. Kobdaj, P. Suebka, Y. M. Zheng, Amand Faessler, Th Gutsche, V. E. Lyubovitskij

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Abstract

The reactions e +e - → π +π - and e +e - → N̄N with N = p, n are studied in a nonperturbative quark model. The work suggests that the two-step process, in which the primary q̄q pair first forms a vector meson which in turn decays into a hadron pair, is dominant over the one-step process in which the primary q̄q pair is directly dressed by additional q̄q pairs to form a hadron pair. To reproduce the experimental data of the reaction e +e - → n̄n and p̄p, a D-wave, ω-like vector meson with a mass of around 2 GeV has to be introduced.

Original languageEnglish
Article number025204
JournalPhysical Review C - Nuclear Physics
Volume71
Issue number2
DOIs
Publication statusPublished - Feb 2005
Externally publishedYes

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ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Nuclear and High Energy Physics

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