[Jlab-seminars] Physics Seminar Announcement Reminder

[Luci Collins]

Physics Seminar  
Fri., Nov.13, 2009, 11:00 AM
CEBAF Center Aud.
Cookies & Coffee at 10:45 AM


Fatiha Benmokhtar
Carnegie Mellon University

"Flavor Decomposition of the Nucleon Electromagnetic Form Factors"

In order to do the complete separation of the three lightest quarks 
contributions to the electromagnetic properties of the nucleon, several 
Parity Violation(PV) electron scattering experiments have been carried 
out during the last decade.  The G0 experiment at the Thomas Jefferson 
National Accelerator Facility measured the PV asymmetry in the cross 
section for polarized electrons off liquid hydrogen and deuterium. 
Measurements were made at two momentum transfers 0.23 and 0.62 
(GeV/c)2.  Combined with forward angle measurements by the same 
collaboration on a hydrogen target, the contribution of strange quarks 
to the proton's charge and magnetization distributions are determined. 
Details of the experimental setup including the data acquisition and 
electronics readout will be shown.  Final results of the complete 
separation of the strange electric and strange magnetic form factors 
will be presented and compared to a variety of theoretical predictions.  
Complete decomposition of the nucleon electromagnetic form factors to 
the lightest three flavors is obtained.


Upcoming Seminars:

Nov. 20 - Jacques Soffer (Temple University)
Nov. 25 - Yi Qiang (Duke)
Dec. 4  - Seamus Riordan (UVa)
Dec. 15 - Heidi Schellman (Northwestern)


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