University of Pennsylvania
Department of Physics and Astronomy
High Energy Physics Seminar
Abstract:
Top Quark Production in the All-Jet Channel at D0
The top decay channel where all final decay products are jets has the
largest branching fraction of all decay channels, and is the most
kinematically constrained. it is also the most challenging channel to
measure due to the large QCD multijet background. this compelled us to
use unique tools such as quark/gluon jet differences, and to make
extensive use of neural networks, to separate the top signal from the
QCD background. i'll explain how we did this with data from the D0
detector.
Abstract:
Radiocoherence and Neutrino Physics
The concept of radiocoherence in dense-media showering has been around
for over 30 years, but has yet to be observed experimentally. The
principal is behind the proposal for a new technology for the
detection of ultra-high energy neutrinoes in extensive detectors such
as the south polar ice. i'll discuss proposals to measure the effect
at fermilab and at slac, and current plans for implementation at the
south pole.