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arxiv: 1109.5817 · v1 · pith:J7ZC4ALYnew · submitted 2011-09-27 · ✦ hep-ex · hep-ph

I=0, C=-1 mesons from 1940 to 2410 MeV

classification ✦ hep-ex hep-ph
keywords dataomegaomega-etapbar-ppolarisationstensoraccurateangular
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New Crystal Barrel data are reported for pbar-p -> omega-eta and pbar-p -> omega-pizero-pizero with omega decaying to piplus-piminus-pizero. The omega-eta data confirm angular distributions obtained earlier from data where omega -> pizero-gamma. The new omega-eta data provide accurate measurements of vector and tensor polarisations of the omega and lead to considerable improvements in masses and widths of s-channel resonances. A new J^PC = 3^+- I = 0 resonance is observed with mass M = 2025+-20 MeV and width Gamma = 145+-30 MeV. Polarisation is close to zero everywhere and tensor polarisations are large, as is the case also for pbar-p -> omega-pizero.

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