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Deep Virtual Neutral Pion Production at 6.6 and 8.8 GeV with CLAS12

ORAL

Abstract

 Generalized Parton Distributions (GPDs) parameterize the amplitude for Deep Exclusive Hadronic Processes,

and encode partonic information simultaneously in longitudinal momentum and transverse impact parameter

position. In recent years it has been shown that Deep Virtual Neutral Pion Production (DV0 P) is particularly

sensitive to the chiral-odd GPDs HT  and E

T  , thereby allowing access to quark transverse spin densities in

unpolarized and polarized nucleons.

An extensive exclusive reaction program to measure GPDs is currently being carried out at the Thomas

Jeerson Accelerator Facility. Here we report on progress extracting DV0 P with the CEBAF Large Acceptance

Spectrometer (CLAS12) at 6.6 and 8.8 GeV. The joint analysis these beam energies, together with the 10.6 GeV

dataset, will allow a Rosenbluth separation of the longitudinal and transverse parts of the cross-section. In this

talk we will show preliminary results for the Beam Spin Asymetries for DV0 P with CLAS12 at several beam

energies.

Presenters

  • Francois-Xavier Girod

    Jefferson Lab, Jefferson Lab/Jefferson Science Associates

Authors

  • Francois-Xavier Girod

    Jefferson Lab, Jefferson Lab/Jefferson Science Associates