Λ-hyperon production via the pp → pK+Λ reaction 2 MeV above threshold

The pp → pK + Λ reaction was measured at COSY with a proton beam momentum of 2.345 GeV/c, i.e. with an excess energy of 2 MeV above threshold. The total cross section was determined to be 8.2 ± 1.8 nb. The present data point close to the production threshold indicates, that existing phenomenological...

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Bibliographic Details
Published in:Physics letters. B 1996-11, Vol.388 (4), p.859-865
Main Authors: Balewski, J.T, Budzanowski, A, Dombrowski, H, Goodman, C, Grzonka, D, Haidenbauer, J, Hanhart, C, Jarczyk, L, Jochmann, M, Khoukaz, A, Kilian, K, Köhler, M, Kozela, A, Lister, T, Maier, R, Moskal, P, Oelert, W, Prasuhn, D, Quentmeier, C, Santo, R, Schepers, G, Seddik, U, Sefzick, T, Smyrski, J, Sokołowski, M, Strzałkowski, A, Wolke, M, Wüstner, P
Format: Article
Language:English
Subjects:
Baryon-hyperon scattering length
Final state interaction
Strangeness production
Threshold measurement
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Summary:The pp → pK + Λ reaction was measured at COSY with a proton beam momentum of 2.345 GeV/c, i.e. with an excess energy of 2 MeV above threshold. The total cross section was determined to be 8.2 ± 1.8 nb. The present data point close to the production threshold indicates, that existing phenomenological parametrizations of the total kaon production cross section are insufficient.
ISSN:0370-2693
1873-2445
DOI:10.1016/S0370-2693(96)01360-3