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Diffraction dissociation, resonances and deck mechanism in the Kω systems of the reactions K±p→(K±ω)p

Authors :
Keith W. J. Barnham
G. Otter
G.T. Jones
V. T. Cocconi
A. Stergiou
K.M. Storr
Jimmy J.N. Macnaughton
Patrick Schmid
J.K. Tuominiemi
Yves Goldschmidt-Clermont
D. R. O. Morrison
Denis Johnson
Britta Buschbeck
H. Wieczorek
Ph. Herquet
B. Pollock
Heimo M T H. Saarikko
Reiner Klein
J.B. Kinson
G.A. Grammatikakis
Roland Windmolders
J. Schreiber
Gerald Rudolph
Source :
Nuclear Physics B. 181:1-21
Publication Year :
1981
Publisher :
Elsevier BV, 1981.

Abstract

A study is presented of the reactions K+p→(K+ω)p at 8.25 and 16 GeV/c and K−p→(K−ω)p at 10 and 16 GeV/c and comparison is made with K+ results at 10 GeV/c and K− at 7.3 GeV/c. The (K+ω) and (K−ω) mass spectra both present a strong enhancement very near threshold, while a second peak at ∼1.7 GeV is evident only with incident K− at the lower energies. The threshold peak has very weak energy dependence and is mostly due to the 1+S state which is produced conserving s-channel helicity. It is suggested that this is another decay mode of the resonance Q1(1290) known to decay mainly into Kϱ. The ratio of the Q1 coupling constants to the Kω and Kϱ decay channels, Rω = gKω2/gKϱ2 is determined to be 0.21±0.04. The enhancement at 1.7 GeV is predominantly, but not exclusively, due to the 2− state. While the K+ and K− induced reactions give basically similar results, small differences are observed that can be qualitatively explained in the framework of the Deck model.

Details

ISSN :
05503213
Volume :
181
Database :
OpenAIRE
Journal :
Nuclear Physics B
Accession number :
edsair.doi...........c7826d739cb73b359f1b1a323c6e5593
Full Text :
https://doi.org/10.1016/0550-3213(81)90504-6