Kaon pair production in proton-proton collisions at COSY-ANKE

Qiujian Ye, A. Wrońska, R. Skibiński, C. Guaraldo, St. Kistryn, H. Ströher
2012 EPJ Web of Conferences  
The near-threshold production of kaon-pairs has been investigated in protonproton collisions at Cooler Synchrotron (COSY)at Forschungszentrum Jülich. In the pp → ppK + K − reaction, the invariant mass distributions of K − p, K − pp, and K + K − indicate the presence of both K − p and K + K − final state interactions. Total cross sections for pp → ppφ reaction have been determined at excess energies ε of 18.5, 34.5, and 76 MeV. The differential spectra at an excess energy of 18.5 MeV exhibit a
more » ... ear s-wave dominance, while the high statics data at an excess energy of 76 MeV shows that higher partial waves represent the majority of the pp → ppφ total cross section, whose energy dependence would then seem to require some s-wave φp enhancement near threshold.
doi:10.1051/epjconf/20123706003 fatcat:tfh4pi2u5ngyriqzydoxadqu24