Evidence for a New Strangeness-One Pseudoscalar Meson

G. W. Brandenburg; R. K. Carnegie; R. J. Cashmore; M. Davier; W. M. Dunwoodie; T. A. Lasinski; D. W. G. S. Leith; J. A. J. Matthews; P. Walden; S. H. Williams

doi:10.1103/PhysRevLett.36.1239

Evidence for a New Strangeness-One Pseudoscalar Meson

G. W. Brandenburg, R. K. Carnegie, R. J. Cashmore, M. Davier, W. M. Dunwoodie, T. A. Lasinski, D. W. G. S. Leith, J. A. J. Matthews, P. Walden, and S. H. Williams

Phys. Rev. Lett. 36, 1239 – Published 24 May 1976

Abstract

The $J^{P} = 0^{-}$ partial waves of the $K π π$ system in the reactions $K^{\pm} p \to K^{\pm} π^{+} π^{-} p$ at 13 GeV are presented. Structure in intensities and relative phase variations suggest the existence of a pseudoscalar resonance, the $K^{'}$ , with a mass of ∼1400 MeV and a width of ∼250 MeV decaying predominantly into $ε K$ .

Received 9 February 1976

DOI:https://doi.org/10.1103/PhysRevLett.36.1239

Authors & Affiliations

G. W. Brandenburg^*, R. K. Carnegie^†, R. J. Cashmore^‡, M. Davier^§, W. M. Dunwoodie, T. A. Lasinski, D. W. G. S. Leith, J. A. J. Matthews^∥, P. Walden^¶, and S. H. Williams

Stanford Linear Accelerator Center, Stanford University, Stanford, California 94305

^*Now at Physics Department, Massachusetts Institute of Technology, Cambridge, Mass. 02139.
^†Now at Physics Department, Carleton University, Ottawa, Ont., Canada K1S 5B6.
^‡Now at Physics Department, Oxford University, Oxford, England.
^§Now at Laboratoire de l'Accélérateur Linéaire, Orsay, France.
^∥Now at Physics Department, Michigan State University, East Lansing, Mich. 48824.
^¶Now at TRIUMF, University of British Columbia, Vancouver, B. C., Canada V6T 1W5.