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Study of proton dissociation into ΛK⁺ in 3-body final states at 10 and 16 GeV/c

Authors:	G Otter H Remplewski G Rudolph L Becker R Klein W Lohmann HJ Schreiber K Böckmann U Idschok J Lowsky B Schröder DJ Kocher DRO Morrison K-L Wernhard T Coghen KWJ Barnham R Eason H Rohringer

Institution:	III. Physikalisches Institut der Technischen Hochschule, Aachen, Germany;Institut für Hochenergiephysik der Akademie der Wissenschaften der DDR, Berlin-Zeuthen, Germany;Physikalisches Institut der Universität, Bonn, Germany;CERN, European Organization for Nuclear Research, Geneva, Switzerland;Institute of Nuclear Physics, Cracow, Poland;Physics Department, Imperial College, London, UK;Institut für Hochenergiephysik der Österreichischen Akademie der Wissenschaften, Vienna, Austria

Abstract:	Results are presented for p → (ΛK⁺) dissociation in the reactions K^?p → ΛK⁺K^? and and π^±p → ΛK⁺π^±at 10 and 16 GeV/c. The cross sections for the low-mass ΛK⁺ enhancement are compatible with the energy dependence σ ∝ p_lab^?0.3. The t′ spectra or the (ΛK⁺) threshold enhancement are exponential in shape. Its decay angular distribution reveals neither s-channel nor t-channel helicity conservation. The relative probabilities of the processes $p → p, p → (N π)_{I=12} and p → (Λ K^{+})$ dissociation are in the ratios 100 : 10 : 0.2, independent of the nature of the incident particle.

Keywords:	Aachen-Berlin-Bonn-CERN-Cracow-London-Vienna Collaboration
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