Multiple pion production in K+
-proton collisions at 3.5 GeV/c
An analysis is made of K+ proton interactions in which three or four pions are produced. The experiment was conducted in the Brookhaven 80-inch bubble chamber using an incident beam of 3.5 GeV/c K+ mesons. Events of the type K+ + p → Ko + p + (3 or 4π)+ were selected from the four-prong plus Vo topology. A search is made in these reactions for the production of excited states of the K meson which decay with the emission of one or more pions. The kappa (725) and K* (892) are discussed in some detail. Evidence is presented for a K* resonance of mass 1305 MeV. Upper limits are measured for the Kω and Kη decays of the K*(1420). A K*+ (892)π+ enhancement is observed in this data at 1180 MeV. In addition to a study of K meson excited states, some properties of the ω and η mesons are studied in a production process with very little background. © 1969.
Erwin, AR; Walker, WD; Goshaw, AT; Weinberg, A
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