Speaker
Mr
Rocky So
(University of British Columbia)
Description
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 Υ meson (Υ → γA0). We saw no evidence of the A0 decaying into mu+mu-, tau+tau-, hadrons, or invisible final states with a sample of 122 million Υ(3S), 99 million Υ(2S), and 23 million Υ(1S) from Υ(2,3S) decays collected at the PEP II B-factory. We set upper limits on product branching fractions B(Υ→γA0)xB(A0→various states) as low as 10^-6 for A0 masses from threshold up to 9GeV/c^2. As a result, we exclude a large fraction of parameters space for Next to Minimal Supersymmetry. We also search for a dark Higgs boson motivated by astrophysical experiments using 516/fb of data collected with the BABAR detector. We could not find evidence of such a dark Higgs so we set upper limits on its branching fraction.
| Presentation Type | Parallel Talk |
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Primary author
Mr
Rocky So
(University of British Columbia)
