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Further study of theE/f 1 (1420) meson in central production |
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| Authors: | T. A. Armstrong M. Benayoun I. J. Bloodworth J. N. Carney C. J. Dodenhoff C. Evangelista B. R. French B. Ghidini M. Girone A. Jacholkowski J. Kahane J. B. Kinson A. Kirk K. Knudson V. Lenti Ph. Leruste A. Malamant J. L. Narjoux F. Navach A. Palano N. Redaelli L. Rossi M. Sené R. Sené M. Stassinaki G. Vassiliadis O. Villalobos Baillie M. F. Votruba G. Zito |
| Affiliation: | 1. European Organization for Nuclear Research, CERN, Geneva, Switzerland 3. Collège de France, Paris, France 4. Physics Department, University of Birmingham, Birmingham, UK 5. Dipartimento di Fisica dell'Università and Sezione INFN, Bari, Italy 8. Nuclear Physics Department, Athens University, Athens, Greece |
| Abstract: | We have studied the reactions (({{pi ^ + } mathord{left/ {vphantom {{pi ^ + } p}} right. kern-0em} p})p to ({{pi ^ + } mathord{left/ {vphantom {{pi ^ + } p}} right. kern-0em} p})(Kbar Kpi )p) where the (Kbar Kpi ) system is centrally produced, at 85 GeV/c and 300 GeV/c using the CERN Omega spectrometer. A spin-parity analysis of theK S 0 K ± π ? system shows the presence of a strongJ PC=1++ signal which we identify as theE/f 1 (1420) meson. We also find evidence for the decayE/f 1(1420)→K S 0 K S 0 π 0 which determines theC-parity of this state to be positive. Alternative explanations of the data have been tested and ruled out. Hence we obtain the quantum numbers of theE/f 1 (1420) to beI G(JPC)=0+(1+). |
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