Nuclear Physics Seminars

ics Nuclear
Tuesday, October 4, 2005
3:30 PM
Physics Building, Room 204
David Armstrong [Host: Donal Day]
College of William and Mary
"Strangeness in the Proportion: Parity-Violating Electron Scattering and the Structure of the Nucleon"
ABSTRACT:
The fleeting existence of quark-antiquark pairs within the proton (or neutron) is a well-established consequence of quantum chromodyamics. It is, however, still a largely open question as to whether this sea of quark-antiquark pairs, which contains contributions from all the quark flavors (up, down, strange, etc.), has any effect on the properties of the nucleon. In particular, the contribution of the sea to the magnetic moment and the charge distribution of the proton has been a topic of considerable interest. A series of experiments, using parity-violating electron scattering to probe of the sea, have been conducted at various labs in recent years. The results of these experiments, in particular the G0 and HAPPEX experiments at Jefferson Lab, will be reviewed, and possible interpretations of the results will be presented.

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