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Parity-Violating Electron Deuteron Scattering and the Proton's Neutral Weak Axial Vector Form Factor

Journal Article · · Physical Review Letters
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We report on a new measurement of the parity-violating asymmetry in quasielastic electron scattering from the deuteron at backward angles at Q2 = 0.038 (GeV/c)2. This quantity provides a determination of the neutral weak axial vector form factor of the nucleon, which can potentially receive large electroweak corrections. The measured asymmetry A = z3.51±0.57 (stat)±0.58 (syst) ppm is consistent with theoretical predictions. We also report on updated results of the previous experiment at Q2 = 0.091 (GeV/c)2, which are also consistent with theoretical predictions.
Research Organization:
Thomas Jefferson Lab National Accelerator Facility
Sponsoring Organization:
USDOE
DOE Contract Number:
AC05-84ER40150
OSTI ID:
955477
Report Number(s):
JLAB-THY-04-46; nucl-ex/0310001; DOE/ER/40150-3041
Journal Information:
Physical Review Letters, Journal Name: Physical Review Letters Vol. 92
Country of Publication:
United States
Language:
English

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