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Measurement of exclusive $\pi^+ \pi ^-$ and $\rho^0$ meson photoproduction at HERA
Exclusive photoproduction of ${{\rho ^0}} (770)$ mesons is studied using the H1 detector at the ep collider HERA. A sample of about 900,000 events is used to measure single- and double-differential cross sections for the reaction $\gamma p \rightarrow \pi ^{+}\pi ^{-}Y$. Reactions where the proton s...
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