[Theory-seminars] Cake seminar on Wednesday 12/07

[Alexei Prokudin]

Dear all,

we will have cake seminar at 14:00 on Wednesday, 12/07
in L102/4:

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Speaker: Franz Gross

Title: What do g1(x) and g2(x) tell us about the spin and angular 
momentum content in the nucleon?

Abstract:

Using the covariant spectator theory (CST), I will present results of a valence quark-diquark model 
calculation of the nucleon structure function f(x) measured in unpolarized deep inelastic scattering 
(DIS), and the structure functions g1(x) and g2(x) measured in DIS using polarized beams and targets.  
Parameters of the wave functions are adjusted to fit all the data. The fit fixes both the shape of the 
wave functions and the relative strength of each component.  Two solutions are found that fit f(x) and 
g1(x), but only one of these gives a good description of g2(x).  This  fit  requires  the nucleon CST
wave functions contain a  large D-wave component (about 35%) and a small P-wave component (about 0.6%).
The significance of these results will be discussed. 


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A complete list of upcoming theory seminars and talks from previous

seminars is available from:

http://wwwold.jlab.org/div_dept/theory/seminars/





Alexei, Alvaro and Satoshi

JLab Theory Seminar Organizers

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 Alexei Prokudin                    | Tel:     +1 (757) 269 5385
 JLab Theory Center                 | Fax:     +1 (757) 269 7002
 12000 Jefferson Avenue             | E-mail:  prokudin at jlab.org
 Newport News, VA 23606             | http://www.to.infn.it/~prokudin
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