Speaker
Georges Vasseur
(CEA/IRFU,Centre d'etude de Saclay Gif-sur-Yvette (FR))
Description
We present a search for a light CP-odd Higgs boson (A0) in Upsilon(1S) -> gamma A0, A0 -> ccbar decays. The Upsilon(1S) mesons are selected via the dipion transition Upsilon(2S) -> pi+pi- Upsilon(1S), and the A0 -> ccbar final state is tagged through the reconstruction of various D(*) mesons. No significant signal is observed, and limits on the product branching fraction B(Upsilon(1S) -> gamma A0)xB(A0 -> ccbar) are established at the level of 7x10^-5 - 2x10^-3 for A0 mass values between 4.0 GeV and 9.25 GeV.
Author
Georges Vasseur
(CEA/IRFU,Centre d'etude de Saclay Gif-sur-Yvette (FR))
