Bulletin of the American Physical Society
5th Joint Meeting of the APS Division of Nuclear Physics and the Physical Society of Japan
Volume 63, Number 12
Tuesday–Saturday, October 23–27, 2018; Waikoloa, Hawaii
Session FD: Electroweak Experiment and Theory
9:00 AM–11:30 AM,
Friday, October 26, 2018
Hilton Room: Kohala 3
Chair: Dinko Pocanic, University of Virginia
Abstract ID: BAPS.2018.HAW.FD.7
Abstract: FD.00007 : Consistent Methods for Extracting the Proton’s Weak Charge*
10:30 AM–10:45 AM
The final results of the Qweak collaboration were published this year (Androic, et al., Nature 557, 207 (2018)). That work describes how the proton’s weak charge was extracted from the parity-violating asymmetry measured in ep scattering at Q2=0.0248 (GeV/c)2. Hadronic corrections were accounted for by including other parity-violating experiments in a global fit which was extrapolated to Q2=0 to obtain the proton’s weak charge. Here we describe a new fitting technique which has the advantage that the extrapolation is linear in Q2. It also relies on measured parity-violating asymmetries, but uses calculated instead of fitted axial and strange form factors. The weak charge obtained in this new procedure is consistent with that obtained in the recent publication.
*This work was supported by DOE Contract No. DEAC05-06OR23177, under which Jefferson Science Associates, LLC operates Thomas Jefferson National Accelerator Facility.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2018.HAW.FD.7
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