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

Article
Report number	arXiv:1109.5247 ; QMPI01 ; QMPI01
Title	Combined analysis of meson channels with I=1, C = -1 from 1940 to 2410 MeV
Author(s)	Anisovich, A.V. (St. Petersburg, INP) ; Baker, C.A. (Rutherford) ; Batty, C.J. (Rutherford) ; Bugg, D.V. (Queen Mary, U. of London) ; Montanet, L. (CERN) ; Nikonov, V.A. (St. Petersburg, INP) ; Sarantsev, A.V. (St. Petersburg, INP) ; Sarantsev, V.V. (St. Petersburg, INP) ; Zou, B.S. (Queen Mary, U. of London)
Publication	2011
Imprint	27 Sep 2011
Number of pages	14
Note	Comments: Makes available the final combined analysis of data with I=1, C = -1 with almost a complete spectrum of expected mesons. 14 pages, 6 figures Makes available the final combined analysis of data with I=1, C = -1 with almost a complete spectrum of expected mesons. 14 pages, 6 figures
In:	Phys. Lett. B 542 (2002) 8
DOI	10.1016/S0370-2693(02)02302-X
Subject category	Particle Physics - Experiment
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.

$$M(\pi ^+\pi ^- \pi ^0)$ from the preliminary data selection for (a) $\omega \pi ^0$ data, (b) $\omega \eta \pi ^0$ at 900 MeV/c; the number of events v. the square of the matrix element for $\omega$ decay in (c) $\omega \pi ^0$, (d) $\omega \eta \pi ^0$; (e)-(j): curves show the error corridor for $\omega \pi ^0$ differential cross sections where $\omega$ decays to $\pi ^0 \gamma$; they are corrected for angular acceptance; points with errors show new results for $\omega$ decays to $\pi ^+\pi ^-\pi ^0$; the vertical dashed lines show the cut-off which has been used.$ $$M(\pi ^+\pi ^- \pi ^0)$ from the preliminary data selection for (a) $\omega \pi ^0$ data, (b) $\omega \eta \pi ^0$ at 900 MeV/c; the number of events v. the square of the matrix element for $\omega$ decay in (c) $\omega \pi ^0$, (d) $\omega \eta \pi ^0$; (e)-(j): curves show the error corridor for $\omega \pi ^0$ differential cross sections where $\omega$ decays to $\pi ^0 \gamma$; they are corrected for angular acceptance; points with errors show new results for $\omega$ decays to $\pi ^+\pi ^-\pi ^0$; the vertical dashed lines show the cut-off which has been used.$ $$M(\pi ^+\pi ^- \pi ^0)$ from the preliminary data selection for (a) $\omega \pi ^0$ data, (b) $\omega \eta \pi ^0$ at 900 MeV/c; the number of events v. the square of the matrix element for $\omega$ decay in (c) $\omega \pi ^0$, (d) $\omega \eta \pi ^0$; (e)-(j): curves show the error corridor for $\omega \pi ^0$ differential cross sections where $\omega$ decays to $\pi ^0 \gamma$; they are corrected for angular acceptance; points with errors show new results for $\omega$ decays to $\pi ^+\pi ^-\pi ^0$; the vertical dashed lines show the cut-off which has been used.$ Show more plots

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