Search for a light Higgs Boson at Babar

Babar collided electrons and positrons at a centre of mass energy of 10GeV at the Stanford Linear Accelerator Center. A light CP-odd Higgs boson is expected in extensions to the Standard Model such as Next to Minimal Supersymmetry. The Babar Collaboration searched for a light Higgs boson (A0) produced in radiative decays of an Y meson. We saw no evidence of the A0 decaying into various final states with a sample of 122 million Y(3S), 99 million Y(2S), and 23 million Y(1S) collected at the PEP II B-factory. We exclude some of the parameters space of Next to Minimal Supersymmetry. Some searches are published and a few is still in the analysis stage. I will present work done by the collaboration as well as my work in progress for the A0 to hadrons.