Monday, Feb. 21, at 4:00 PM in NSC 224. Join us for refreshments in NSC 231 at 3:45 PM.
NOTE: Special date and time
"Discovery Physics With Jets at the Large Hadron Collider"
Dr. Adam Gibson, University of Toronto
What are the fundamental constituents of matter? Is anything truly uncuttable? It's one of the oldest questions in science. Rutherford showed us the atomic nucleus, and for forty years we have known that protons and neutrons have substructure as well: quarks and gluons. Are quarks
fundamental? Or might they too have substructure? (Is it turtles all the
way down?) At CERN's Large Hadron Collider we are now addressing questions
like this one with the highest energy particle collisions ever attained in
After years of preparation, CERN's Large Hadron Collider
(LHC) enjoyed a successful first year of proton-proton operations in 2010.
Commissioning of the detector with cosmic rays has quickly transformed into
physics analysis and publications with collision data. Abundantly produced
at colliders, samples of jets from quark and gluon production were used for
several of the first ATLAS physics publications. These included
measurements confirming predicted properties of jet production, but also
searches for new physics using events featuring two highly energetic jets
and the first search at the LHC to exceed the reach of the Tevatron. With
no evidence for new physics, we proceeded to set limits on various
postulated phenomena including quark substructure and quantum black hole
production in the presence of large extra dimensions. After a description
of the LHC and the ATLAS detector, I will describe our searches for new
physics using dijet events. And, I will present our brand new search results
with the full 2010 dataset.