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A measurement of the cross section for four-pion production in λλ collisions at spear

et al.

Published Web Location

https://doi.org/10.1016/0370-2693(81)90691-2
Creative Commons 'BY' version 4.0 license
Abstract

We present a measurement of the cross section for the reaction e+e- → e+e-π+π-π+π-at SPEAR. This channel is found to be large and dominated by the process γγ → ρ{variant}0ρ{variant}0 → π+π-π+π-. The cross section, which is small just above the four-pion threshold, exhibits a large enhancement near the ρ{variant}0ρ{variant}0 threshold. © 1981.

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