[Jlab-seminars] Physics Seminar Announcement

[Luci Collins]

*Physics Seminar
Friday, June 22, 2012
11:00AM
CEBAF Center AUD.
Cookies & Coffee at 10:45AM*

*"Nucleon Electromagnetic Form Factors and Spin"

Gerald Miller
University of Washington*

  A model of the nucleon wave function is proposed. The model consists 
of a relativistic quark-diquark representation of the bare nucleon.
The effects of  a pion cloud are also included. Parameters of the  model 
are chosen so as to reproduce experimentally measured form factors, and 
a very good representation is achieved. A consequence of the model is 
that the quarks carry only 36 % of the nucleon total spin,
with the reminder being due to quark and pion orbital angular momentum.
This result can explained as though starting from the naive quark model 
and including a series of necessary  modest effects.




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