Partial-wave analysis of backwardly produced three-pion systems in K−p interactions at 4.2 GeV/c |
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Authors: | B. Foster P. Grossmann P.R. Lamb W.L. McDowell J. Wells R. Blokzijl G.F. Wolters R. Armenteros C. Dionisi Ph. Gavillet P.F. Loverre M. Mazzucato J.J. Engelen W. Kittel J.S.M. Vergeest R.T. Van De Walle |
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Affiliation: | Nuclear Physics Laboratory, University of Oxford, UK;CERN, European Organization for Nuclear Research, Geneva, Switzerland |
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Abstract: | We report on the results of a partial-wave analysis of the 3π system produced by baryon exchange in the reaction K?p→Σ?π+π+π? at 4.2 GeV/c. We confirm the existence of an enhancement in the 1+S(?π) wave as previously established from a Dalitz plot analysis of the same data. The phase variation of this wave is found to be consistent with that expected for a resonance and thus the enhancement is identified with A1 production. No clear signal for this state is found in either the reaction K?p→Σ+π+π+π?π? or K?p→Λπ+π?π0. We also find production via baryon exchange of the A2 in all three reactions and the ω and (1975) in the third reaction. |
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Keywords: | ACNO Collaboration |
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