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Combined analysis of meson channels with I=1, C = -1 from 1940 to 2410 MeV

By A. V. Anisovich, C. A. Baker, C. J. Batty, D. V. Bugg, L. Montanet, V. A. Nikonov, A. V. Sarantsev, V. V. Sarantsev and B. S. Zou

Abstract

New Crystal Barrel data are reported for pbar-p -> omega-pizero and pbar-p -> omega eta-pizero with omega decaying to piplus-piminus-pizero. The shapes of angular distributions agree well with those for data where omega -> pizero-gamma; this is a valuable cross-check on systematic errors. The new data provide good measurements of vector and tensor polarisations P_y, T20, T21 and T22 of the omega. These lead to significant improvements in parameters of several resonances reported earlier. New values of masses and widths (in Mev) are: J^PC = 5^-- (2300+-45, 260+-75), J^PC = 3^-- (2260+-20, 160+-25), J^PC = 1^+- (2240+-35, 320+-85), and J^PC = 1^-- (2110+-35, 230+-50). A remarkable feature of the data is that vector polarisation P_y is close to zero everywhere. It follows that all interfering amplitudes have relative phases close to 0 or 180 deg. Tensor polarisations are large.Comment: Makes available the final combined analysis of data with I=1, C = -1 with almost a complete spectrum of expected mesons. 14 pages, 6 figure

Topics: High Energy Physics - Experiment, High Energy Physics - Phenomenology
Publisher: 'Elsevier BV'
Year: 2011
DOI identifier: 10.1016/S0370-2693(02)02302-X
OAI identifier: oai:arXiv.org:1109.5247

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