[b1_ana] was sent earlier, anyhow

[Simonetta Liuti]

THIS WAS SENT BEFORE I HAD ACCESS TO THE E-MAIL LIST...(I decided to send it anyhow) 

Dear All,
yes, we had a very productive meeting with Oscar, Dustin and Kunal! (I should say that I am in fact also glad I learned about your b_1 proposal from Patricia's talk at INT).

Thanks for the references. Will read.

To summarize, we have agreed  that in the next couple of weeks (before the collaboration conference call two Mondays from now), we will perform a study of the observables based on the helicity amplitudes. In a nutshell, we need to check and extend Section 6 of the Hoobhoy, Jaffe, Manohar original paper (that really dates back awhile!).   
 
We already worked out the amps. for our Angular Momentum sum rule paper. Our formalism is sketched out in a short publication 

http://prd.aps.org/abstract/PRD/v86/i3/e036008

(we are in the process of writing a longer paper). 
We are now going going to extend this and explain what is needed for b_1 (H_5 in the GPD formalism) i.e. define the relevant observables (what type of asymmetries) from the amps.

I have an extra question on whether you would consider detecting an extra photon (and test the AM sum rule ;-) ), but this is a side remark for now.

I am also attaching the talk I gave in Shanghai last Fall.

Please let me know if there in any other question.

Looking forward to working some more on all this!
Simonetta
************************************************************************************
**************************************************************
Prof. Simonetta Liuti                     telephone (434) 982-2087
Department of Physics               FAX       (434) 924-4576
University of Virginia              home      (434) 973 9593
382 McCormick Rd.
PO Box 400714
Charlottesville, VA 22904-4714
-------------- next part --------------
A non-text attachment was scrubbed...
Name: sl_OAM12_shanghai.pdf
Type: application/pdf
Size: 26036842 bytes
Desc: not available
Url : https://mailman.jlab.org/pipermail/b1_ana/attachments/20130316/ba360c07/attachment-0001.pdf