May 1, 2009 (Friday) Juergen Reuter, Universitat Freiburg Physikalisches Institut
May 15, 2009 (Friday) Takemichi Okui, Johns Hopkins University
June 1, 2009 Ray Frey, University of Oregon
June 4, 2009 Luke Winstrom, UC, Santa Cruz
12:00, 412 Willamette Hall
Bring your own lunch
4:00 pm, 412 Willamette Hall
Refreshments served at 3:45
4:00 pm, 472 Willamette Hall
Refreshments served at 3:45
I will discuss the search for invisible decays of the Y(1S) meson and the potential connection to low mass (<~5GeV) dark matter candidates. I will present the details of the BaBar search for this mode using the dipion transition Y(3S) -> \pi+ \pi- Y(1S) as a tag for the presence of a Y(1S). Background suppression and prediction will be discussed, as well as systematic errors on the analysis. A new upper limit on this decay rate is measured.
, 412 Willamette Hall