E-viri
PDF
Recenzirano
-
Czerwinski, E.; Moskal, P.; Klaja, J.; Klaja, P.; Krzemien, W.; Institute for Nuclear Physics and Juelich Center for Hadron Physics, Research Center Juelich, D-52425 Juelich; Grzonka, D.; Oelert, W.; Ritman, J.; Sefzick, T.; Wuestner, P.; Czyzykiewicz, R.; Gil, D.; Kamys, B.; Silarski, M.; Smyrski, J.; Zdebik, J.; Zielinski, M.; Khoukaz, A.; Taeschner, A.; Siemaszko, M.
Physical review letters, 09/2010, Letnik: 105, Številka: 12Journal Article
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}{sup '} meson was measured with a resolution of 0.33 MeV/c{sup 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{yields}pp{eta}{sup '} events, the total width of the {eta}{sup '} meson was determined to be {Gamma}{sub {eta}}{sup '}=0.226{+-}0.017(stat){+-}0.014(syst) MeV/c{sup 2}.
