Implications of the Q$_{\rm weak}$ Commissioning Result

ORAL

Abstract

The commissioning results of the Q$_{\rm weak}$ experiment at Jefferson Lab, which constituted approximately 4\% of the total results obtained in that experiment, were recently published (D. Androic, {\em et al.} [Q$_{\rm weak}$ Collaboration], Phys. Rev. Lett. 111, 141803 (2013)). After a brief review of the experiment, new, unpublished results derived from that publication will be presented. The sensitivity of the fit used to extract the proton's weak charge to the choice of electromagnetic form factors, to the proton radius puzzle, and to the dipole mass used for the Q$^2$ evolution will be examined. The running of $\sin^2(\theta_W)$ and the experiment's mass reach will be discussed. The status of the ongoing effort to complete the analysis of the full experiment will also be shown.

Authors

  • Greg Smith

    Jefferson Lab