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ElectroWeak Workshop

The Scientific Impact and Feasibility of an Ultra-precise 12 GeV Moeller Experiment to Test the Standard Model
December 11-13, 2006
Jefferson Lab, Newport News, VA USA

Workshop Consensus Statement

The availability of a stable, high intensity 11 GeV polarized electron beam with the Jefferson Laboratory Energy Upgrade provides an unprecedented opportunity to probe the limits of the electroweak theory through the study of parity-violation in Møller scattering. To explore this exciting possibility in detail, a workshop was held at Jefferson Laboratory, with participation from leading theorists and experimentalists in the field.

There was general consensus that a measurement of the parity-violating asymmetry with a total error five times smaller than for similar approved experiments at JLab was feasible. There was overwhelming enthusiasm to aggressively proceed with the design of such an experiment, which would yield a measurement of the weak mixing angle sin2θW(0) with an error between 0.0002 and 0.0003, which is more than a factor five improvement over the recent SLAC experiment. Such an experiment, with the stated precision, would continue JLab's world leadership role in electroweak physics, complementing similar efforts in beta-decay, g – 2, etc.

The broader physics impacts could be summarized as follows:

In terms of feasibility of the project, some of the points made were: