[Jlab-seminars] Physics Seminar Announcement

[Luci Collins]

*Physics Seminar
Friday, December 4, 2009
11:00AM
CEBAF Center AUD.
Cookies & Coffee at 10:45AM*


*"Measurements of Electric Form Factor of the Neutron at High Momentum 
Transfer"

Seamus Riordan
University of Virginia *

The electric and magnetic form factors of the nucleons parameterize 
elastic scattering in the one photon exchange approximation and provide 
experimental access to the underlying quark charge and magnetic moment 
distributions.  These form factors are excellent testing grounds for QCD 
and QCD-inspired models and are of fundamental importance in our 
understanding of non-perturbative QCD. Of the four nucleon form factors, 
the electric form factor of the neutron, GEn, has been measured in the 
smallest range of momentum transfer.  Hall A at Jefferson Lab has 
recently performed measurements of GEn which greatly extend the range in 
Q2 and new experiments have been approved for the 12 GeV upgrade to 
extend the range even further.  Results for GEn at three Q2 points, 1.7, 
2.5 and 3.5 GeV2 will be presented and compared with QCD-based models 
and phenomenological approaches. An overview of approved 12 GeV GEn 
measurements will also be presented.


Upcoming Seminar:

Dec. 15 - Heidi Schellman (Northwestern)


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