Study of the hadronic production of kaon pairs below the threshold for the phi meson.pdf

8 Study of the hadronic production of kaon pairs below the threshold for 0 the φ meson 0 2 ab a c ab a a b P. Moskal , M. Silarski , A. Budzanowski , E. Czerwi´nski , R. Czy˙zykiewicz , D. Gil , D. Grzonka , l ab a a d ab b a u M. Janusz , L. Jarczyk , B. Kamys , A. Khoukaz , P. Klaja , W. Oelert , C. Piskor-Ignatowicz , ab a b b e a d J J. Przerwa , B. Rejdych , J. Ritman , T. Sefzick , M. Siemaszko , J. Smyrski , A. T¨aschner , b b b a e a 0 P. Winter , M. Wolke , P. W¨ustner , M. J. Zieli´nski , W. Zipper , J. Zdebik 1 aInstitute of Physics, Jagiellonian University, PL-30-059 Cracow, Poland ] x bIKP ZEL, Forschungszentrum J¨ulich, D-52425 J¨ulich, Germany e l- cInstitute of Nuclear Physics, PL-31-342 Cracow, Poland c u dIKP, Westf¨alische Wilhelms-Universit¨at, D-48149 M¨unster, Germany n [ eInstitute of Physics, University of Silesia, PL-40-007 Katowice, Poland 2 + − v The near threshold production of K K pairs in proton-proton collisions has been investigated at the cooler 2 synchrotron COSY below and above the threshold for the φ meson using the COSY-11 and ANKE facilities, 8 respectively. The excitation function determined for the pp →ppK +K − reaction revealed a statistically significant 6 enhancement close to the threshold which may plausibly be assigned to the influence of the K −p interaction. In 1 addition, observed consis