Strangeness Production in Proton-Proton Collisions Close to Threshold

By M. Wolke; H. -H. Adam; A. Budzanowski; R. Czyzykiewicz; D. Grzonka; M. Janusz; L. Jarczyk; B. Kamys; A. Khoukaz; K. Kilian; P. Kowina; T. Lister; P. Moskal; W. Oelert; T. Rozek; R. Santo; G. Schepers; T. Sefzick; M. Siemaszko; J. Smyrski; S. Steltenkamp; A. Strzalkowski; P. Winter; P. Wustner; W. Zipper

doi:10.1016/s0375-9474(03)01152-7

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Strangeness Production in Proton-Proton Collisions Close to Threshold

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Abstract

Exclusive data on the reactions pp -> ppK+K- and pp -> pK+ Lambda/Sigma0 have been taken at the cooler synchrotron COSY close to threshold. At equal excess energies, an enhancement of the Lambda/Sigma0 ratio by one order of magnitude has been observed compared to data at higher excess energies. New results obtained at the COSY-11 facility explore the transition region between this low-energy Sigma0 suppression and excess energies of 60 MeV. A first total cross section for elementary antikaon production below the phi threshold has been determined, two orders of magnitude smaller compared to kaon production at the same excess energy.

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By M. Wolke, H. -H. Adam, A. Budzanowski, R. Czyzykiewicz, D. Grzonka, M. Janusz, L. Jarczyk, B. Kamys, A. Khoukaz, K. Kilian, P. Kowina, T. Lister, P. Moskal, W. Oelert, T. Rozek, R. Santo, G. Schepers, T. Sefzick, M. Siemaszko, J. Smyrski, S. Steltenkamp, A. Strzalkowski, P. Winter, P. Wustner, W. Zipper. 2003-02-12. Strangeness Production in Proton-Proton Collisions Close to Threshold. https://doi.org/10.1016/s0375-9474(03)01152-7

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