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20 April 2024

» arxiv » nucl-ex/0402008

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Energy dependence of the Lambda/Sigma0 production cross section ratio in proton proton interactions
P. Kowina ; M. Wolke ; H.-H. Adam ; A. Budzanowski ; R. Czyzykiewicz ; D. Grzonka ; J. Haidenbauer ; M. Janusz ; L. Jarczyk ; B. Kamys ; A. Khoukaz ; K. Kilian ; P. Moskal ; W. Oelert ; C. Piskor-Ignatowicz ; J. Przerwa ; C. Quentmeier ; T. Rozek ; R. Santo ; G. Schepers ; T. Sefzick ; M. Siemaszko ; J. Smyrski ; S. Steltenkamp ; A. Strzalkowski ; A. Taschner ; P. Winter ; P. Wustner ; W. Zipper ;
Date:	6 Feb 2004
Journal:	Eur.Phys.J. A22 (2004) 293-299
Subject:	nucl-ex
Affiliation:	Julich, Forschungszentrum & Jagellonian U. & Munster U. & Cracow, INP & Silesia U. & ZEL, Julich
Abstract:	The production of the Lambda and Sigma0 hyperons has been measured via the pp->pK+Lambda / Sigma0 reaction at the internal COSY-11 facility in the excess energy range between 14 and 60 MeV. The transition of the Lambda/Sigma0 cross section ratio from about 28 at Q<=13 MeV to the high energy level of about 2.5 is covered by the data showing a strong decrease of the ratio between 10 and 20 MeV excess energy. Effects from the final state interactions in the p-Sigma0 channel seem to be much smaller compared to the p-Lambda one. Estimates of the effective range parameters are given for the N-Lambda and the N-Sigma systems.
Source:	arXiv, nucl-ex/0402008
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