Quark model description of quasi-elastic pion knockout from the proton at JLAB

I. T. Obukhovsky, D. Fedorov, Amand Faessler, Th Gutsche, V. E. Lyubovitskij

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The interference term between s- and t-pole contributions to the p(e,e′π+)n cross section is evaluated on the basis of the constituent quark model. It is shown that the contribution of baryon s-poles can be modeled by a nonlocal extension of the Kroll-Ruderman contact term. This contribution is in a destructive interference with the pion t-pole that is essential to improve the description of recent JLab data at the invariant mass W=1.95 GeV. Some predictions are made for a new JLab measurement at higher values W=2.1-2.3 GeV and Q2 centered at 1.6 and 2.45 GeV 2/c2.

Original languageEnglish
Pages (from-to)220-226
Number of pages7
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Issue number2-3
Publication statusPublished - 9 Mar 2006
Externally publishedYes



  • Hadron form factors
  • Meson electroproduction
  • Quark model

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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