Hard Exclusive Electroproduction of Two Pions off Proton and Deuteron at HERMES

Details Hard Exclusive Electroproduction of Two Pions off Proton and Deuteron at HERMES Hard Exclusive Electroproduction of Two Pions off Proton and Deuteron at HERMES

2002-11-04

arxiv.org/abs/hep-ex/0211008v2

Physics

High Energy Physics

High Energy Physics - Experiment

5 pages, LaTex, 9 EPS figures. Talk given by R.Fabbri at SPIN 2002, BNL. References modified

Scientific paper

10.1063/1.1607150

Exclusive electroproduction of $\pi^+\pi^-$ pairs off hydrogen and deuterium targets has been studied with the HERMES experiment. The angular distribution of the $\pi^+$ in the $\pi^+\pi^-$ rest system has been studied in the invariant mass range $0.3 < m_{\pi\pi} <1.5$ GeV. Theoretical models derived in the framework of the Generalized Parton Distributions show that this angular distribution receives only contributions from the interference between the isoscalar channel I=0 and the isovector channel I=1.

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