\Upsilon(1s)-->\gamma(\eta',\eta) decays

TL;DR

This paper investigates the decay processes of psilon(1s) into gamma and eta or eta' particles, highlighting the strong dependence on quark mass and predicting very small decay rates for these channels.

Contribution

The study applies a successful predictive approach to psilon(1s) decays, revealing significant quark mass dependence and providing new predictions for decay rates.

Findings

Strong quark mass dependence in decay processes

Predicted very small decay rates for psilon(1s) decays

Consistent with previous predictions for J/39 decays

Abstract

The decays of $\Upsilon(1s)\to\gamma(\eta',\eta)$ are studied by an approach which has successfully predicted the ratio $\frac{\Gamma(J/\psi\to\gamma\eta')}{\Gamma(J/\psi\to\gamma\eta)}$. Strong dependence on quark mass has been found in the decays $(J/\psi, \Upsilon(1s))\to\gamma(\eta',\eta)$. Very small decay rates of $\Upsilon(1s)\to\gamma(\eta',\eta)$ are predicted.