Spin parity structure of the Q and L enhancements in K−p → (K−π−π+)p at 10 and 16 GeV/c期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

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Spin parity structure of the Q and L enhancements in K⁻p → (K⁻π⁻π⁺)p at 10 and 16 GeV/c

Authors:	M Deutschmann G Otter G Rudolph H Seyfert H Wieczorek H Böttcher WD Nowak S Nowak VT Cocconi MJ Counihan JD Hansen GT Jones G Kellner W Kittel A Kotanski DRO Morrison D Sotiriou TC Bacon J Strauss

Institution:	1. III. Physikalisches Institut der Technischen Hochschule, Aachen, Germany;2. Institut für Hochenergiephysik der Akademie der Wissenschafter der DDR, Berlin-Zeuthen, Germany;3. CERN, European Organisation for Nuclear Research, Geneva, Switzerland;4. Physics Department, Imperial College, London, England

Abstract:	A parital wave analysis of the (Kππ) system produced in K^?p → (K^?π^?π⁺)p at 10 and 16 GeV/c has been performed. It is found that in 88% of the cases the Kππ) system is in unnatural spin-parity (J^P) states 0^?, 1⁺, 2^? …, with contributions from many decay modes, $κπ, K^{1} (890)π, K^{1} (1420)π, K ?, K ? and Kf$ . More than one decay m and J^P state are required to describe the Q and L enhancements, suggesting a composite structure of these enhancements. The (Kππ) system is produced dominantly (～95%) by natural parity exchange. Overall, the production mechanism of the (Kππ) system is remarkably similar to that of the 3π system in π^?p → (π^?π^?π⁺)p, even i detailed spin-parity structure.

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