Studies of Chiral-Odd GPDs in Hard Exclusive Pseudoscalar Me- son Production

Conference · Wed Oct 01 04:00:00 EDT 2014

OSTI ID:1963402

Avagyan, Harutyun ^[1]; Kim, Andrey ^[2]; Burkert, Volker ^[1]

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1. Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
2. Univ. of Connecticut, Storrs, CT (United States)

Deeply virtual exclusive electroproduction of pseudoscalar mesons in hard scattering processes provides a unique avenue to access chiral-odd GPDs. The latter enter the soft matrix elements in transverse virtual photon-proton scattering. Transverse photon polarization dominates ?0, ?, and K production in the multi GeV region owing to the fact that t-channel meson pole contribution either does not occur (?0 and ?), or is predicted to be relatively small (K+,Ko). We will present ongoing studies of spin and azimuthal asymmetries in hard exclusive production of pseudoscalar mesons at Jefferson Lab, and proposed future measurements to study chiral-odd GPDs at JLab and Electron Ion Collider. Combination of measurements of cross sections, spin and azimuthal asymmetries with a longitudinally polarized beam and both unpolarized and longitudinally polarized proton targets for ?o, ? and K+,Ko electroproduction will provide a detailed test of the mechanism for pseudoscalar meson electroproduction including strangeness, and allow to perform flavor decomposition of underlying chiral-odd GPDs.

• Research Organization: Thomas Jefferson National Accelerator Facility, Newport News, VA (United States)
• Sponsoring Organization: USDOE Office of Science (SC), Nuclear Physics (NP)
• DOE Contract Number: AC05-06OR23177
• OSTI ID: 1963402
• Report Number(s): JLAB-PHY-14-2052; DOE/OR/23177-5859
• Country of Publication: United States
• Language: English