Calendar of Physics Talks Vienna

Studying Baryon Resonances with the CLAS Detector at Jefferson Lab
Speaker:Philip Cole (Idaho State University) (HEPHY-SMI seminar on fundamental interactions and symmetries)
Abstract:An energetic photon incident on a nucleon can interact directly with one of the quarks inside, causing the quark to undergo a flip in spin or endowing the quark with an orbital or radial excitation, and thus, by exciting the quarks to a higher energy state, the nucleon becomes more energetic. These excited states are called baryon resonances (N*s) and are short lived (~10^-24 s.) These N*s will dominantly decay into a ground-state nucleon and one or more mesons.The types of mesons produced and how they are distribu- ted in space in the decay process provide key information on the internal symmetries of the quarks in the nucleon. The study of these excited states is called spectroscopy. And just as ordinary optical spectroscopy proved to be the incisive tool for understan- ding the electronic structure of the elements, we expect nucleon spectroscopy will reveal many of the basic features
Date: Wed, 20.08.2014
Time: 17:00
Duration: 60 min
Location:Stefan Meyer Institute for subatomic Physics 1090 Wien, Boltzmanngasse 3 Seminarraum 2.08
Contact:Ken Suzuki