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Title: Single and double polarization asymmetries from deeply virtual exclusive pi^0 electroproduction

The target and double spin asymmetry measurements of exclusive p0 electroproduction were performed for the first time in DIS region at Jefferson Lab using the CEBAF Large Acceptance Spectrometer (CLAS) and longitudinally polarized proton target. The wide kinematic coverage and good resolution of CLAS allowed measurements in full azimuthal range providing an opportunity to extract single and double spin asymmetries proportional to polarized structure functions. Their angular dependencies in hadronic center-of-mass system were analyzed, and extracted moments are compared to recent theoretical handbag-based calculations based on chiral-even and chiral-odd GPDs contributions. The interpretation of present results within the framework of the modified perturbative approach and their use as a constraint for models of the t behavior will be discussed.
 [1] ;  [2] ;  [2]
  1. University of Connecticut, Storrs, CT
  2. Jefferson Lab, Newport News, VA
Publication Date:
OSTI Identifier:
Report Number(s):
JLAB-PHY-14-1929; DOE/OR/23177-3576
DOE Contract Number:
Resource Type:
Resource Relation:
Conference: DIS 2014, 28 Apr - 2 May 2014. Warsaw, Poland
Research Org:
Thomas Jefferson National Accelerator Facility, Newport News, VA (United States)
Sponsoring Org:
USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)
Country of Publication:
United States