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arXiv · hep-ex/0602030

Kaon pair production close to threshold

P. Winter·M. Wolke·H. -H. Adam·A. Budzanowski·R. Czyzykiewicz·D. Grzonka·M. Janusz·L. Jarczyk·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
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Abstract

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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P. Winter, M. Wolke, H. -H. Adam, A. Budzanowski, R. Czyzykiewicz, D. Grzonka, M. Janusz, L. Jarczyk, 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. 2006-02-15. Kaon pair production close to threshold. https://doi.org/10.1016/j.physletb.2006.02.037

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