Antiproton-proton annihilation at rest into K+K-π0

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. FaesslerP. 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, B. S. Zou

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Abstract

The annihilation channel p̄p → K+K-π0 in liquid hydrogen at rest has been studied with the Crystal Barrel detector at LEAR. The measured branching ratio is: BR(p̄p → K+K-π0) = (2.37 ± 0.15) × 10-3. A partial wave analysis shows that this reaction is dominated by the π(KK̄)S, KK *(892) and πφ(1020) intermediate states. Weak signals are observed for πa2(1320), πf2(1270), πf′2(1525) and K(Kπ)S. A satisfactory description of the Dalitz plot requires the introduction of π(KK̄)P intermediate states with at least one pole.

Original languageEnglish
Pages (from-to)178-188
Number of pages11
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume468
Issue number1-2
DOIs
Publication statusPublished - Jan 1 1999

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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    Abele, A., Adomeit, J., Amsler, C., Baker, C. A., Barnett, B. M., Batty, C. J., Benayoun, M., Berdoz, A., Bischoff, S., Blüm, P., Braune, K., Bugg, D. V., Case, T., Cramer, O., Crowe, K. M., Degener, T., Doser, M., Dünnweber, W., Engelhardt, D., ... Zou, B. S. (1999). Antiproton-proton annihilation at rest into K+K-π0. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 468(1-2), 178-188. https://doi.org/10.1016/S0370-2693(99)01191-0