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arXiv · hep-ph/9610302

Diffractive rho^0 photo- and leptoproduction at high energies

G. Niesler·G. Piller·W. Weise
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Abstract

We discuss the elastic photo- and leptoproduction of rho^0-mesons from nucleons at Q^2 < 1 GeV^2 as studied in recent experiments at HERA and FNAL. We find that the mass distribution of the measured π^+π^- pairs is determined to a large extent by the two-pion contribution to the photon spectral function as given by the pion form factor. With rising Q^2 the rate of diffractive events decreases and the π^+π^- mass distribution approaches a symmetric shape.

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G. Niesler, G. Piller, W. Weise. 1996-10-09. Diffractive rho^0 photo- and leptoproduction at high energies. https://doi.org/10.1016/s0370-2693(96)01237-3

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