Total Cross Section of the Reaction pp to pK^+Λ Close to Threshold

J. T. Balewski , A. Budzanowski , H. Dombrowski , W. Eyrich , C. Goodman , D. Grzonka , J. Haidenbauer , C. Hanhart

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J. Hauffe L. Jarczyk M. Jochmann A. Khoukaz K. Kilian M. K\"ohler A. Kozela T. Lister A. Metzger P. Moskal W. Oelert C. Quentmeier R. Santo G. Schepers U. Seddik T. Sefzick J. Smyrski M. Soko{\l}owski F. Stinzing A. Strza{\l}kowski C. Thomas S. Wirth M. Wolke R. Woodward P. W\"ustner D. Wyrwa

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classification ⚛️ nucl-ex nucl-th

keywords crossenergylambdameasuredreactionsectionthresholdtotal

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The energy dependence of the total cross section for the pp \to pK^+\Lambda reaction was measured in the threshold region covering the excess energy range up to 7MeV. Existing model calculations describe the slope of the measured cross sections well, but are too low by a factor of two to three in rate. The data were used for a precise determination of the beam momentum of the COSY-synchrotron.

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Total Cross Section of the Reaction pp to pK^+Λ Close to Threshold

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