Determination of the total width of the eta' meson

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.

arXiv comment4 pages, 4 figures

References in corpus (11)

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Cited by in corpus (10)

• Precision tests of fundamental physics with $\eta$ and ${\eta }^{\prime }$ mesons
• eta - eta prime Mixing -From electromagnetic transitions to weak decays of charm and beauty hadrons
• Etaprime and Eta Mesons with Connection to Anomalous Glue
• Determination of the eta'-proton scattering length in free space
• Anomalous decays of eta' and eta into four pions
• Few-body aspects of the near threshold pseudoscalar meson production
• Study of the N N eta' production with COSY-11
• Study of the eta meson production with polarized proton beam
• Close to threshold eta' meson production in proton-proton collisions at COSY-11
• Lifetime of the eta' meson at low temperature