Speaker
Dr
Nuruzzaman Nuruzzaman
(Universidad Técnica Federico Santa María)
Description
The beam normal single spin asymmetry (Bn) is generated in the scattering of normally polarized electrons from unpolarized nuclei. The asymmetry arises from the interference of the imaginary part of the two-photon exchange with the one-photon exchange amplitude. The Q-weak experiment has made the first measurement of Bn in the production of the Δ(1232) resonance, using the Q-weak apparatus in Hall-C at the Thomas Jefferson National Accelerator Facility. The measurement was performed with beam energy of 1.160 GeV at an average scattering angle of about 8.3 degrees. Bn for the Δ is the only observable, that we know of, that is sensitive to the elastic form-factors (γ*ΔΔ) in addition to the generally studied transition form-factors (γ*NΔ), but extracting this information will require significant theoretical input. The status of the analysis and a preliminary result will be presented and compared to a calculation.
| Is this an abstract for a New Perspectives presentation? | NP presentation |
|---|
Primary author
Dr
Nuruzzaman Nuruzzaman
(Universidad Técnica Federico Santa María)