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Elastic ρ' and ϕMeson Photo- and Electroproduction with Non-Resonant Background

M. G. Ryskin·Yu. M. Shabelski
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Abstract

The backgrounds due to the direct diffractive dissociation of the photon into the $π^+π^-$ as well as $K^+K^-$ pairs to the "elastic" diffractive $ρ'$ and $ϕ$ mesons production in electron-proton collisions are calculated. It is shown that the role of background and background-resonant interference contributions is very important in experimental distribution of $M_{π^+ π^-}$ in the $ρ'$ mass region. The amplitude for the background process is proportional to the $π$-meson - proton or K-meson - proton cross sections. Therefore, describing the HERA data, one can estimate $σ(πp)$ and $σ(Kp)$ at energies higher than the region of direct measurements.

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M. G. Ryskin, Yu. M. Shabelski. 1997-12-18. Elastic ρ' and ϕMeson Photo- and Electroproduction with Non-Resonant Background. https://arxiv.org/abs/hep-ph/9712437

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