First measurement of differential cross sections and photon beam asymmetries for photoproduction of the f0 (980) meson decaying into π0π0 at Eγ < 2.4 GeVстатья
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Аннотация:For the first time, differential cross sections and photon beam asymmetries were measured for the reactiongamma p-> f0 (980)p-> pi 0 pi0 p by using a linearly polarized photon beam up to 2.4 GeV and a liquid hydrogen target. The f0 (980) photoproduction signal was clearly observed owing to the absence of contributions from vector-meson photoproduction. The results indicate the t-channel exchange of vector mesons as a mechanism of the f0 (980) photoproduction at E gamma /approx 2.1 GeV, putting constraints on the nature of f0 (980).DOI: 10.1103/PhysRevC.107.L042201