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arXiv · 1109.5247

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

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

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A. V. Anisovich, C. A. Baker, C. J. Batty, D. V. Bugg, L. Montanet, V. A. Nikonov, A. V. Sarantsev, V. V. Sarantsev, B. S. Zou. 2011-09-24. Combined analysis of meson channels with I=1, C = -1 from 1940 to 2410 MeV. https://doi.org/10.1016/s0370-2693(02)02302-x

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