English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Zendy Plus

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Zendy Tools

Zendy Open

The near threshold production of K+K- pairs in proton-proton collisions hasbeen investigated at the cooler synchrotron COSY below and above the thresholdfor the $\phi$ meson using the COSY-11 and ANKE facilities, respectively. Theexcitation function determined for the pp-->ppK+K- reaction revealed astatistically significant enhancement close to the threshold which mayplausibly be assigned to the influence of the K-p interaction. In addition,observed consistently by both groups, a strong enhancement at low values of theratio of the K-p to K+p invariant mass distributions shows that the protoninteracts much stronger with K- than with K+. In this report we focus on themeasurements performed by the COSY-11 collaboration. We explain theexperimental method used and present main results of completed analyses as wellas a new qualitative elaboration of the ppK+K- events population on theGoldhaber plot. We conclude with the observation that event densities increaseat the region where the influence from the K+K- interaction is expected.

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