Search for the non-D\barD Decay psi(3770) --> K_S^0 K_L^0

TL;DR

This study searches for a rare decay mode of psi(3770) into K_S^0 K_L^0 using the largest dataset available, finding no signal and setting an upper limit that tests theoretical models of charmonia mixing.

Contribution

First search for the non-DarD decay psi(3770) -> K_S^0 K_L^0 with the largest dataset, providing an upper limit that constrains theoretical predictions.

Findings

No signal observed for psi(3770) -> K_S^0 K_L^0.

Upper limit on cross section: < 0.07 pb at 90% CL.

Results test charmonia-mixing theoretical models.

Abstract

Using the current world's largest data sample of psi(3770) decays, we present results of a search for the non-DDbar decay psi(3770) -> KsKl. We find no signal, and obtain an upper limit of Sigma(psi(3770) -> KsKl) < 0.07 pb at 90% confidence level (CL). Our result tests a theoretical prediction for the upper bound on B(psi(3770) -> KsKl) based on a charmonia-mixing model.