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Determination of the Total Width of the η Meson
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2010 (English)In: Physical Review Letters, ISSN 0031-9007, E-ISSN 1079-7114, Vol. 105, no 12, 122001- p.Article in journal (Refereed) Published
Abstract [en]

Taking advantage of both the low-emittance proton beam of the cooler synchrotron COSYand 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 Gamma(eta') = 0.226 +/- 0: 017(stat) +/- 0: 014(syst) MeV/c(2).

Place, publisher, year, edition, pages
2010. Vol. 105, no 12, 122001- p.
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Physical Sciences
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URN: urn:nbn:se:uu:diva-134667DOI: 10.1103/PhysRevLett.105.122001ISI: 000282138900003OAI: oai:DiVA.org:uu-134667DiVA: diva2:373681
Available from: 2010-12-01 Created: 2010-11-30 Last updated: 2017-12-12Bibliographically approved

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