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Kaon pair production close to threshold

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arxiv hep-ex/0602030 v1 pith:IRMIK3E7 submitted 2006-02-15 hep-ex

Kaon pair production close to threshold

P. Winter , M. Wolke , H.-H. Adam , A. Budzanowski , R. Czyzykiewicz , D. Grzonka , M. Janusz , L. Jarczyk
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B. Kamys A. Khoukaz K. Kilian P. Klaja P.Moskal W. Oelert C. Piskor-Ignatowicz J. Przerwa J. Ritman T. Rozek T. Sefzick M. Siemaszko J. Smyrski A. Taschner P. Wustner Z. Zhang W. Zipper (Forschungszentrum Julich IKP & ZEL; Jagellonian Univ.; Munster Univ.; Cracow INP; Silesia Univ.)
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keywords crossenhancementinvariantmassessectionsystemtotaladdition
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The total cross section of the reaction pp->ppK+K- has been measured at excess energies Q=10 MeV and 28 MeV with the magnetic spectrometer COSY-11. The new data show a significant enhancement of the total cross section compared to pure phase space expectations or calculations within a one boson exchange model. In addition, we present invariant mass spectra of two particle subsystems. While the K+K- system is rather constant for different invariant masses, there is an enhancement in the pK- system towards lower masses which could at least be partially connected to the influence of the Lambda(1405) resonance.

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