| J. Adomeit, B. Kammle, J. Meier, P. Schmidt, R. Seibert, U. Strohbusch (2007) | |||||||||||||
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| We present a measurement and partial wave analysis of the final state KLK \Sigma ß \Upsilon of ¯ pp annihilation at rest in liquid hydrogen. This reaction is important for the study of the ¯ KK decay mode of scalar resonances, in particular the isovectors a 0 (980) and a 0 (1450). The determination of the a 0 (1450) production also fixes the ¯ KK coupling of the isoscalar f 0 (1500) which is discussed as a glueball. We find B(¯pp ! a 0 (1450)ß; a 0 (1450)! ¯ KK) = (8:88 \Sigma 1:68) \Delta 10 \Gamma4 and hence B(¯pp ! f 0 (1500)ß; f 0 (1500)! ¯ KK) = (4:52\Sigma0:36) \Delta 10 \Gamma4 . The mass and width of a 0 (1450) are m = 1480\Sigma30 MeV/c 2 and \Gamma = 265 \Sigma 15 MeV/c 2 , respectively. For a 0 (980) we determine the relative ratio B(¯pp! a 0 ß; a 0 ! ¯ KK)/ B(¯pp! a 0 ß; a 0 ! ßj) = 0:23 \Sigma 0:05 and its relative coupling, ¯ KK to ßj, is 1:03 \Sigma 0:14. 13.25.-k, 14.40.Cs, 14.40.Ev Typeset using REVT E X I. INTRODUCTION Proton-antiproton annihilation... | |||||||||||||
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