1. Eta electroproduction at CLAS Cross sections and structure functions (analysis of e1-DVCS run) CLAS Collaboration (Ivan Bedlinsky, Valery Kuberovsky, PS, et al.) For submission to PRC ( under collaboration-wide review for)

2.   and     elusive  transversity GPDs in the nucleon.   and    combined - individual u and d quark flavors. Already published   Physical Review Letters (2012) and Physical Review C (2014) These experiments are precursors to exp. E12-06-108 “Hard Exclusive Electroproduction of    and   with CLAS12”

3. Measured for

4. M (  )

5. Virtual photon cross section. Structure functions

6. Each structure function has its specific sensitivity to different aspects of transversity GPDs 

8.  0 and  structure functions 00 

9. Theoretical analyses : Regge: Laget Handbag: Goldstein and Luitti, Goloskokov and Kroll We follow the development Goloskokov and Kroll

10. Transversity GPDs are initiated by transverse photons Nucleon Helicity flip Nucleon Helicity non-flip

11. M. Defurne et al. – Hall AFuchey et al.– Hall A

12. Generalized form factors (GFF)

13.    

15. Deconvolute  0 and  to get contributions from quark flavors.  0 and  are members of the same meson multiplet. Extracting GPDs for individual quark flavors. Constituent quark relationships

16. deconvolution: Valery Kubarovsky

17. Goloskokov and Kroll – Model GPDs Example : x B =0.2 Q 2 =2  =0.11

18.  0 and  structure functions (Goloskokov and Kroll) 00  00 

19. Ratio   But !!!

20. A. Kim PRL-submitted CLAS – V. Kubarovsky

21. Conclusion  electroproduction paper in final ad hoc review – PRC  0 and  electroproduction dominated by transverse amplitudes. Unique window on Higher Q 2 and lower – t planned for CLAS12  0 and  cross sections and asymmetries on P and N at higher Q 2 and lower will enable us to obtain transversity GPDs for individual quark flavors.

22. Supplemental Slides

23. Cross Sections and Structure Functions Measured 19 bins of Q 2 - x B acceptance ~20 bins in  bins in t

24. fit to  U,  TT fit to E T, H T

26. Deconvolute  0 and  to get contributions from quark flavors.  0 and  are members of the same meson multiplet. Extracting GPDs for individual quark flavors.

28. W=2.2 GeV, Q 2 =1.6 GeV 2, x B =.284