Study of the reactions $e^+e^-\to K^+K^-\pi^0\pi^0\pi^0$, $e^+e^-\to K^{0}_{S}K^{\pm}\pi^{\mp}\pi^0\pi^0$, and $e^+e^-\to K^{0}_{S}K^{\pm}\pi^{\mp}\pi^+\pi^-$ at center-of-mass energies from threshold to 4.5 GeV using ISR

TL;DR

This paper measures the cross sections of specific multi-kaon and pion final states in electron-positron collisions from threshold to 4.5 GeV using ISR, providing first-time measurements and resonance contributions.

Contribution

It presents the first measurements of these complex hadronic final states' cross sections and resonance contributions in e+e- collisions up to 4.5 GeV.

Findings

First measurements of these cross sections.

Observation of J/ψ and ψ(2S) in these channels.

Many branching fractions measured for the first time.

Abstract

We study the processes $e^+e^-\to K^+K^-\pi^0\pi^0\pi^0\gamma$, $K^{0}_{S}K^{\pm}\pi^{\mp}\pi^0\pi^0\gamma$, and $K^{0}_{S}K^{\pm}\pi^{\mp}\pi^+\pi^-\gamma$ in which an energetic photon is radiated from the initial state. The data were collected with the \babar~ detector at the SLAC National Accelerator Laboratory. About 1200, 2600, and 6000 events, respectively, are selected from a data sample corresponding to an integrated luminosity of 469\invfb. The invariant mass of the hadronic final state defines the effective \epem center-of-mass energy. The center-of-mass energies range from threshold to 4.5\gev. From the mass spectra, the first ever measurements of the $e^+e^-\to K^+K^-\pi^0\pi^0\pi^0$, $e^+e^-\to K^0_SK^{\pm}\pi^{\mp}\pi^0\pi^0$, and $e^+e^-\to K^0_SK^{\pm}\pi^{\mp}\pi^+\pi^-$ cross sections are performed. The contributions from the intermediate states that include $\eta$, $\phi$, $\rho$, $K^*(892)$, and other resonances are presented. We observe the $J/\psi$ and $\psi(2S)$ in most of these final states and measure the corresponding branching fractions, many of them for the first time.