Physics & Astronomy Colloquium

3:30 PM, Friday, May 1, 2009
Room 155, Chem-Phys Building

Dr. Michael Kohl
Department of Physics
Hampton University

Elastic Nucleon Form Factors: Still a Developing Story
Elastic electromagnetic form factors of the proton and neutron are fundamental quantities characterizing the distributions of charge and magnetization of the nucleon. Significant advances both in experiment and theory have been made over the last decade. In particular, the use of spin degrees of freedom has led to unprecedented experimental precision in determinations of the nucleon form factors, revealing new phenomena such as the role of two-photon exchange at high four-momentum transfer squared Q2 or effects due to the meson cloud at low Q2. This colloquium will provide an overview of the experimental methods and results with a summary of current and future efforts.

Refreshments will be served in CP 179 at 3:15 PM