# Europhysics Conference on High-Energy Physics 2011

20-27 July 2011
Alpes Congrès - Alpexpo
Europe/Paris timezone

## Search for a CP-odd light Higgs in $\Upsilon(1S)$ radiative decays at Belle

22 Jul 2011, 17:00
15m
Dauphine (Alpes Congrès - Alpexpo)

### Dauphine

#### Alpes Congrès - Alpexpo

Parallel session talk

Jamal Rorie

### Description

We search for a CP-odd light Higgs among 102 M $\Upsilon(1S)$ events recorded with the Belle detector at KEKB. Our signal mode is $\Upsilon(1S)\to\gamma A_0;A_0\to \tau^+\tau^-$, where the $\tau$ is detected via its leptonic decay modes. We determine the upper limits on the production rates for a CP-odd light Higgs with a mass between the $\tau^+\tau^-$ threshold and 9.4 GeV/$c^2$. This result puts stringent constraints on theoretical models of low mass NMSSM Higgs bosons.

 Slides