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18 April 2024

» arxiv » 1008.5294

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Determination of the total width of the eta' meson
E. Czerwinski ; P. Moskal ; D. Grzonka ; R. Czyzykiewicz ; D. Gil ; B. Kamys ; A. Khoukaz ; J. Klaja ; P. Klaja ; W. Krzemien ; W. Oelert ; J. Ritman ; T. Sefzick ; M. Siemaszko ; M. Silarski ; J. Smyrski ; A. Taschner ; M. Wolke ; P. Wustner ; J. Zdebik ; M. Zielinski ; W. Zipper ;
Date:	31 Aug 2010
Abstract:	Taking advantage of both the low-emittance proton-beam of the Cooler Synchrotron COSY and the high momentum precision of the COSY-11 detector system, the mass distribution of the eta’ meson was measured with a resolution of 0.33 MeV/c^2 (FWHM), improving the experimental mass resolution by almost an order of magnitude with respect to previous results. Based on the sample of more than 2300 reconstructed pp --> pp eta’ events the total width of the eta’ meson was determined to be 0.226 +- 0.017(stat.) +- 0.014(syst.) MeV/c^2.
Source:	arXiv, 1008.5294
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