Study of the process $e^+ e^- \to K\bar{K}$ in the center-of-mass energy range 1004--1060 MeV with the CMD-3 detector at $e^+ e^-$ VEPP-2000 collider

TL;DR

This study measures the cross sections of $e^+ e^- o Kar{K}$ processes in the 1004-1060 MeV energy range, providing data to refine vector meson parameters using the CMD-3 detector at VEPP-2000.

Contribution

First precise measurement of $Kar{K}$ cross sections in this energy range with detailed analysis of vector meson contributions.

Findings

Cross sections measured with 2-3% systematic uncertainty.

Parameters of the $oldsymbol{ ext{phi}}(1020)$ meson extracted.

Data supports the Vector Meson Dominance model.

Abstract

The $e^+ e^- \to K^0_{S}K^0_{L}$ and $e^+ e^- \to K^{-}K^{+}$ cross sections have been measured in the center-of-mass energy range 1004--1060 MeV for 25 energy points with about 2$\div$3\% systematic uncertainties. The analysis is based on 5.5 pb$^{-1}$ of integrated luminosity collected with the CMD-3 detector at the VEPP-2000 $e^+ e^-$ collider. The measured cross section is approximated according to Vector Meson Dominance model as a sum of $\phi, \omega, \rho$-like amplitudes and their excitations, and $\phi(1020)$ meson parameters have been obtained.