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. 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 Υ(1S)→ γA0;A0→hadrons.
<strong>Collaboration Name</strong><br /><font color="#000099">Please enter the name of<br />the collaboration or group<br />using the acronym, as in:<br /><font color="#ff0000">ABC Collaboration</font>
Babar Collaboration
<strong>Funding Source</strong>
NSERC (Canada), et al
| <strong>E-mail Address</strong> | rockyso@physics.ubc.ca |
|---|
Primary author
Mr
Rocky So
(University of British Columbia)
