Measurements of the observed cross sections for e+e -> exclusive light hadrons containing K^S_0 meson at \sqrt{s} = 3.773 and 3.650 GeV

TL;DR

This study measures the cross sections of specific light hadron final states containing K_S^0 mesons in electron-positron collisions at energies near 3.7 GeV, providing data on their production rates and limits on psi(3770) decays.

Contribution

First measurements of observed cross sections for several exclusive light hadron final states containing K_S^0 at =3.773 and 3.650 GeV, including setting upper limits on (3770) decay branching fractions.

Findings

Measured cross sections for multiple final states at two energies.

Set upper limits on (3770) decay branching fractions.

Provided experimental data for light hadron production near 3.7 GeV.

Abstract

By analyzing the data sets of 17.3 pb$^{-1}$ taken at $\sqrt s= 3.773$ GeV and of 6.5 pb$^{-1}$ taken at $\sqrt s= 3.650$ GeV with the BES-II detector at the BEPC collider, we measure the observed cross sections for the exclusive light hadron final states of $K_S^0K^-\pi^+$, $K_S^0K^-\pi^+\pi^0$, $K_S^0K^-\pi^+\pi^+\pi^-$, $K_S^0K^-\pi^+\pi^+\pi^-\pi^0$, $K_S^0K^-\pi^+\pi^+\pi^+\pi^-\pi^-$ and $K_S^0K^-\pi^+\pi^0\pi^0$ produced in $e^+ e^-$ annihilation at the two energy points. We set the upper limits on the observed cross sections and the branching fractions for $\psi(3770)$ decay to these final states at 90% C.L..