Observation of an ωπ0 state of mass 1.25 GeV produced by photons of energy 20–70 GeV
1980
Abstract An analysis is presented of the channel γp→π + π − π 0 π 0 p. Evidence is found for an ωπ 0 enhancement of mass ≈1.25 GeV and width ≈0.3 GeV. The enhancement is a mixed spin-parity state with 1 − dominant.
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