Elsevier

Nuclear Physics B

Volume 247, Issue 2, 10 December 1984, Pages 261-292
Nuclear Physics B

Partial wave analysis of the K°π+π system produced in Kp interactions at 11 GeV/c

https://doi.org/10.1016/0550-3213(84)90550-9Get rights and content

Abstract

We have performed a partial wave analysis of the K°π+π system produced in the reaction KpK°π+πn at 11 GeV/c and detected in the LASS spectrometer at SLAC. Results from an analysis of ≈7600 events in the K°π+π mass range from 1090 to 2290 MeV/c2 produced at low t(∥t′∥<0.3 (GeV/c)2) are described.

The JP = 2+, 3 and 4+ amplitudes show the behavior expected of the leading K(1430), K(1780) and K(2060) respectively. The behavior of the JP = 1+ and 2 amplitudes can be associated with the Q2(1400) and the L(1770). The 1 amplitudes exhibit behavior which indicates the existence of two resonant states, one near 1400 MeV/c2 and the other near 1800 MeV/c2.

A simple Breit-Wigner model is used to fit the leading partial wave amplitudes and to compute branching ratios for the K(1430) and the K(1780).

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    Work supported in part by the Department of Energy under contract no. DE-AC03-76SF00515, the National Research Council, Canada and the Natural Sciences and Engineering Research Council, Canada.

    1

    Present address: University of Pennsylvania, Philadelphia, PA 19104, USA.

    2

    Present address: CERN, CH-1211, Geneva 23, Switzerland.

    3

    Present address: NASA, Ames Research Center, Mountain View, CA 94040, USA.

    4

    Present address: Weizmann Institute of Science, Rehovot 76100, Israel.

    5

    Present address: Los Alamos Scientific Laboratory, Los Alamos, NM 87545, USA.

    6

    Present address: Iowa State University, Ames, IA 50011, USA.

    7

    On leave from Nagoya University, Nagoya, Japan.

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