Antiproton-proton annihilation at rest into KoL K ± π πo - Manifestations of isospin interference

A. Abele, J. Adomeit, C. Amsler, C. A. Baker, B. M. Barnett, C. J. Batty, M. Benayoun, A. Berdoz, K. Beuchert, S. Bischoff, P. Blüm, K. Braune, D. V. Bugg, T. Case, O. Cramer, V. Credé, K. M. Crowe, T. Degener, N. Djaoshvili, S. V. DombrowskiM. Doser, W. Dünnweber, A. Ehmanns, D. Engelhardt, M. A. Faessler, P. Giarritta, R. P. Haddock, F. H. Heinsius, M. Heinzelmann, M. Herz, N. P. Hessey, P. Hidas, C. Hodd, C. Holtzhaußen, D. Jamnik, H. Kalinowsky, B. Kämmle, P. Kammel, J. Kisiel, E. Klempt, H. Koch, C. Kolo, M. Kunze, U. Kurilla, M. Lakata, R. Landua, H. Matthäy, R. McCrady, J. Meier, C. A. Meyer, L. Montanet, R. Ouared, F. Ould-Saada, K. Peters, B. Pick, C. Pietra, C. N. Pinder, M. Ratajcak, C. Regenfus, J. Reißmann, S. Resag, W. Roethel, P. Schmidt, I. Scott, R. Seibert, S. Spanier, H. Stöck, C. Straßburger, U. Strohbusch, M. Suffert, U. Thoma, M. Tischhäuser, C. Völcker, S. Wallis, D. Walther, U. Wiedner, B. S. Zou, Č Zupančič

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Abstract

The decay p̄p (at rest) → KoL K ± π πo, studied on a sample of more than 14000 events, is found to proceed dominantly via two-body channels containing resonances with open strangeness. Contributions from K1(1270) K̄ and K1(1400)K̄, branching into the successive K1-decay modes, and from K * K̄ *, K * (K̄π)S and (Kπ)S(K̄π)S are extracted by means of a partial-wave analysis which accounts well for the data and also allows a search for weak contributions from other (Kππ) and from (KK̄π) resonances. Striking asymmetries between the charged and the neutral kaonic resonances give evidence for interfering isospin 0 and 1 annihilation amplitudes.

Original languageEnglish
Pages (from-to)289-298
Number of pages10
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume415
Issue number3
DOIs
Publication statusPublished - Dec 18 1997

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ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Cite this

Abele, A., Adomeit, J., Amsler, C., Baker, C. A., Barnett, B. M., Batty, C. J., Benayoun, M., Berdoz, A., Beuchert, K., Bischoff, S., Blüm, P., Braune, K., Bugg, D. V., Case, T., Cramer, O., Credé, V., Crowe, K. M., Degener, T., Djaoshvili, N., ... Zupančič, Č. (1997). Antiproton-proton annihilation at rest into KoL K ± π πo - Manifestations of isospin interference. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 415(3), 289-298. https://doi.org/10.1016/S0370-2693(97)01267-7