Measurement of $^{3}\mathrm{He}$ Diffractive Minimum with Polarization Observables

ORAL

Abstract

Elastic double-polarization asymmetries, made using a polarized electron beam and a polarized $^{3}\mathrm{He}$ target, are proportional to the product of $^{3}\mathrm{He}$'s electric and magnetic form factors. Unlike a Rosenbluth separation, this asymmetry measurement is sensitive to the sign of the form factors and the zero crossing of the asymmetry correspond to the location of the diffractive minima. By measuring this asymmetry as a function of $Q^{2}$, we will further constrain the location of the diffractive minima and improve our knowledge of the three-body system and help determine the source of the current discrepancies between experiment and theory. These new measurements from experiment E12-06-121A, were performed in Hall C at Jefferson Lab using the CEBAF longitudinally polarized electron beam and a custom polarized $^{3}\mathrm{He}$ gas target. Elastically scattered electrons were detected in both the High Momentum and Super High Momentum Spectrometers over a series of $Q^{2}$ values. The current analysis status will be presented.

Authors

  • Michael Nycz

    Temple University