Measurement of the e+e- -> K+K- cross section in the energy range s**(1/2) = 1.04 - 1.38 GeV with the SND detector in the experiment at the VEPP-2M e+e- collider

TL;DR

This paper reports precise measurements of the e+e- to K+K- cross section in the 1.04 to 1.38 GeV energy range, using the SND detector at VEPP-2M, supporting the vector meson dominance model.

Contribution

First detailed measurement of the e+e- to K+K- cross section in this energy range with high precision using the SND detector.

Findings

Cross section well described by vector meson dominance model.

Measured cross section with 4.4% statistical accuracy.

Systematic uncertainty of 5.2% in measurements.

Abstract

The cross section of the process $e^+e^- \to K^+K^-$ was measured in the energy range $\sqrt{s}$ = 1.04--1.38 GeV in the SND experiment at the VEPP-2M $e^+e^-$ collider. The measured cross section is described by the model of vector meson dominance with contributions from the light vector mesons $\rho$, $\omega$, $\phi$ and their lowest excitations. The mean statistical accuracy of the measurement is 4.4 %, and the systematic uncertainty is 5.2 %.