1. Antiproton-proton annihilation at rest into $K^{+}K^{-}\pi^{0}$
- Author
-
A. Abele, J. Adomeit, C. Amsler, C.A. Baker, B.M. Barnett, C.J. Batty, M. Benayoun, A. Berdoz, S. Bischoff, P. Blüm, K. Braune, D.V. Bugg, T. Case, O. Cramer, K.M. Crowe, T. Degener, M. Doser, W. Dünnweber, D. Engelhardt, M.A. Faessler, P. Giarritta, R.P. Haddock, F.H. Heinsius, M. Heinzelmann, A. Herbstrith, M. Herz, N.P. Hessey, P. Hidas, C. Hodd, C. Holtzhaußen, D. Jamnik, H. Kalinowsky, P. Kammel, J. Kisiel, E. Klempt, H. Koch, M. Kunze, U. Kurilla, M. Lakata, R. Landua, H. Matthäy, R. McCrady, J. Meier, C.A. Meyer, R. Ouared, K. Peters, B. Pick, M. Ratajczak, C. Regenfus, W. Roethel, R. Seibert, S. Spanier, H. Stöck, C. Straßburger, U. Strohbusch, M. Suffert, J.S. Suh, U. Thoma, M. Tischhäuser, I. Uman, C. Völcker, S. Wallis-Plachner, D. Walther, U. Wiedner, K. Wittmack, and B.S. Zou
- Subjects
Rest (physics) ,Physics ,Nuclear physics ,Nuclear and High Energy Physics ,Annihilation ,Proton ,Antiproton ,Hadron physics ,Particle Physics - Experiment - Abstract
The annihilation channel pp to K/sup +/K/sup -/ pi /sup 0/ in liquid hydrogen at rest has been studied with the Crystal Barrel detector at LEAR. The measured branching ratio is: BR(pp to K/sup +/K/sup -/ pi /sup 0/)=(2.37+or-0.15)*10/sup -3/. A partial wave analysis shows that this reaction is dominated by the pi (KK)/sub S/, KK*(892) and pi phi (1020) intermediate states. Weak signals are observed for pi a /sub 2/(1320), pi f/sub 2/(1270), pi f/sub 2/'(1525) and K(K pi )/sub S/. A satisfactory description of the Dalitz plot requires the introduction of pi (KK)/sub P/ intermediate states with at least one pole. (25 refs).
- Published
- 1999