Hot Topics From BABAR Experiment

Abstract

We search for a new light non-Standard Model CP-odd Higgs boson, $A^0$, decaying to ${\tau }^{+}{\tau }^{-}$, ${\mu }^{+}{\mu }^{-}$, and invisible in radiative decays of the ${\rm Y}(2S)$ and ${\rm Y}(3S)$. We search for the light scalar particle produced in single-photon decays of the ${\rm Y}(3S)$ resonance through the process ${\rm Y}(3S)\to \gamma A^0,A^0\to$ invisible. We also search for evidence of an undetectable ${\rm Y}(1S)$ decay recoiling against the dipion system. The data samples contain $99\times 10^6{\rm Y}(2S)$ and $122\times 10^6{\rm Y}(3S)$ decays collected by the \babar\ detector at the SLAC PEP-II $B$ factory.

Comments: Contributed to the Proceedings of 16th International Seminar on High Energy Physics QUARKS-2010, Kolomna, Russia, 6-12 June, 2010