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Bochum 1998 – scientific programme

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HK: Hadronen und Kerne

HK 10: Structure of Baryons, Mesons I, Crystal Barrel Results

HK 10.5: Talk

Monday, March 16, 1998, 15:00–15:15, H

Observation of the fJ(1710) in pp K+Kπ0 in flight. — •M. Ratajczak and Die Crystal Barrel Kollaboration — Institut f"ur Experimentalphysik I, Ruhr-Universit"at Bochum, Universit"atsstra"se 150, D-44780 Bochum

In September 1995 about 60 Mio events of the antiproton-proton annihilation with an incident beam momentum pp = 1.94 GeV/c were detected and recorded by the Crystal Barrel experiment (CERN). Out of these a data sample of 4290 events with the final state K+Kπ0 is extracted.
Apart from well known mesons a resonance decaying into K+K with mass about 1700 MeV/c2 is obviously needed to describe the data. A spin parity analysis rules out odd spin. An observation of the fJ(1710) is plausible. Details will be shown.
These experimental facts give hints for the assignment of resonances to the meson nonetts and for the interpretation of spare candidates as glueballs or hybrids.

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