Speaker
Prof.
Paoti Chang
(National Taiwan University (TW))
Description
A light $CP$-odd Higgs boson $(A^0)$ is predicted in some extensions of the Standard Model; such a particle would be evident in decays of the $\Upsilon(nS)$ resonance.
Using a data sample of 102 million $\Upsilon(1S)$ events and 158 million $\Upsilon(2S)$ events collected by the Belle detector at the KEKB asymmetric-energy $e^+ e^-$ collider, we search for light Higgs boson decays $A^0 \to \tau^+ \tau^-$ and $A^0 \to \mu^+ \mu^-$ in the processes $\Upsilon(1S)\to \gamma A^0$ and $\Upsilon(2S) \to \gamma A^0$.
Author
Prof.
Paoti Chang
(National Taiwan University (TW))
