ϕπProduction by Photons as a Signature for Four-Quark States

Abstract

$\varphi \pi$ production in $e^{+}{e}^{-}$ annihilation and diffractive photoproduction are suggested as a signature for the production and decay of a vector $\mathrm{QQ}\overline{Q}\overline{Q}$ state. Rates are estimated and photoproduction in particular appears to give a reasonable signal.