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 PR Lamb WL McDowell J Wells R Blokzijl GF Wolters R Armenteros C Dionisi Ph Gavillet PF Loverre M Mazzucato JJ Engelen W Kittel JSM Vergeest RT Van De Walle |
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Institution: | 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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