TY - JOUR
T1 - Model-dependence of the γz-dispersion correction to the proton's weak charge
AU - Gorchtein, Mikhail
AU - Horowitz, C. J.
AU - Ramsey-Musolf, M. J.
PY - 2012
Y1 - 2012
N2 - We analyze the dispersion correction to elastic parity violating electron-proton scattering due to γZ exchange and theoretical uncertainties associated with this correction. The new Standard Model prediction for the weak charge of the proton in the kinematics of the Q-Weak experiment, QWp = (0:0767±0:0008±0:0020γZ), the latter error being dominated by the uncertainty in the isospin structure of the inclusive cross-section. To reduce this uncertainty we propose to analyze the VDM sum rule at JLab energy. Another possibility is to perform the measurement of QWp at a lower energy, and such an experiment is planned in Mainz.
AB - We analyze the dispersion correction to elastic parity violating electron-proton scattering due to γZ exchange and theoretical uncertainties associated with this correction. The new Standard Model prediction for the weak charge of the proton in the kinematics of the Q-Weak experiment, QWp = (0:0767±0:0008±0:0020γZ), the latter error being dominated by the uncertainty in the isospin structure of the inclusive cross-section. To reduce this uncertainty we propose to analyze the VDM sum rule at JLab energy. Another possibility is to perform the measurement of QWp at a lower energy, and such an experiment is planned in Mainz.
UR - http://www.scopus.com/inward/record.url?scp=84887551304&partnerID=8YFLogxK
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AN - SCOPUS:84887551304
SN - 1824-8039
JO - Proceedings of Science
JF - Proceedings of Science
T2 - 10th Conference on Quark Confinement and the Hadron Spectrum, Confinement 2012
Y2 - 8 October 2012 through 12 October 2012
ER -