The [[ http://hallaweb.jlab.org/12GeV/Moller/ | MOLLER]] collaboration proposes to measure the parity-violating asymmetry in polarized electron-electron (Møller) scattering, at a beam energy of 11 GeV. In the Standard Model, the predicted asymmetry is due to the interference between the electromagnetic amplitude and the weak neutral current amplitude, the latter being mediated by the Z'_0_' boson. The size of the asymmetry is predicted to be 33 parts per billion (ppb) at our kinematics. Our goal is to measure it to a precision of 0.7 ppb. The result would yield a measurement of the Weak charge of the electron to a fractional accuracy of 2.4% at an average Q'^2^' of 0.0056 GeV'^2^'. At the proposed accuracy, this measurement constitutes a sensitive test of new physics beyond the Standard Model. MOLLER is proposed to run in [[https://www.jlab.org/experimental-hallA | Hall A at Jefferson Laboratory]] after the 12 GeV upgrade of the facility\\

The MOLLER collaboration proposes to measure the parity-violating asymmetry in polarized electron-electron (Møller) scattering, at a beam energy of 11 GeV. In the Standard Model, the predicted asymmetry is due to the interference between the electromagnetic amplitude and the weak neutral current amplitude, the latter being mediated by the Z'_0_' boson. The size of the asymmetry is predicted to be 33 parts per billion (ppb) at our kinematics. Our goal is to measure it to a precision of 0.7 ppb. The result would yield a measurement of the Weak charge of the electron to a fractional accuracy of 2.4% at an average Q'^2^' of 0.0056 GeV'^2^'. At the proposed accuracy, this measurement constitutes a sensitive test of new physics beyond the Standard Model. MOLLER is proposed to run in [[https://www.jlab.org/experimental-hallA | Hall A at Jefferson Laboratory]] after the 12 GeV upgrade of the facility\\


The University of Manitoba subatomic physics is actively contributing to the design, simulation, and construction of the experiment. Specifically, we are work package leaders for the spectrometer design and the main integrating detector system. \\

More detailed information about the experiment and our work on it can obtained by following the menu links at the top of the page.

[[ Attach:DOE_Moller13.pdf | Proposal]]

The MOLLER collaboration proposes to measure the parity-violating asymmetry in polarized electron-electron (Møller) scattering, at a beam energy of 11 GeV. In the Standard Model, the predicted asymmetry is due to the interference between the electromagnetic amplitude and the weak neutral current amplitude, the latter being mediated by the Z'_0_' boson. The size of the asymmetry is predicted to be 33 parts per billion (ppb) at our kinematics. Our goal is to measure it to a precision of 0.7 ppb. The result would yield a measurement of the Weak charge of the electron to a fractional accuracy of 2.4% at an average Q'^2^' of 0.0056 GeV'^2^'. At the proposed accuracy, this measurement constitutes a sensitive test of new physics beyond the Standard Model. MOLLER is proposed to run in Hall A at Jefferson Laboratory.\\

%width=600px height=332px%[[ Attach:MOLLER.png | Attach:MOLLER.png]]

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[[ Attach:MOLLER.png | %width=600px height=332px%MOLLER.png]]

[[ Attach:MOLLER.png | %width=600px height=332px%MOller.png]]

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The MOLLER collaboration proposes to measure the parity-violating asymmetry A'_PV_' in polarized electron-electron (Møller) scattering at a beam energy of 11 GeV. In the Standard Model, A'_PV_' is due to the interference between the electromagnetic amplitude and the weak neutral current amplitude, the latter being mediated by the Z'_0_' boson. A'_PV_' is predicted to be  33 parts per billion (ppb) at our kinematics. Our goal is to measure A'_PV_' to a precision of 0.7 ppb. The result would yield a measurement of the weak charge of the electron Q'^e^''_W_' to a fractional accuracy of 2.4% at an average Q'^2^' of 0.0056 GeV'^2^'. this a sensitive test of new physics beyond the Standard Model. Q'^P^''_weak_' is currently taking data in Hall C at Jefferson Laboratory.\\

(:nosections:)!%center% %blue%The MOLLER Experiment: \\\

||The MOLLER collaboration proposes to measure the parity-violating asymmetry A'_PV_' in polarized electron-electron (Møller) scattering at a beam energy of 11 GeV. In the Standard Model, A'_PV_' is due to the interference between the electromagnetic amplitude and the weak neutral current amplitude, the latter being mediated by the Z'_0_' boson. A'_PV_' is predicted to be  33 parts per billion (ppb) at our kinematics. Our goal is to measure A'_PV_' to a precision of 0.7 ppb. The result would yield a measurement of the weak charge of the electron Q'^e^''_W_' to a fractional accuracy of 2.4% at an average Q'^2^' of 0.0056 GeV'^2^'. this a sensitive test of new physics beyond the Standard Model. Q'^P^''_weak_' is currently taking data in Hall C at Jefferson Laboratory. ||%width=410px height=308px%Attach:ExpStatusSlideShowNonStopCycle.swf \\


The University of Manitoba subatomic physics group has made large scale contributions to the experiment, from the very beginning. We have contributed to the design, simulation, and construction of the experiment as a whole, and specifically to the main detector system and the QTOR spectrometer (see slide show above). Our team of students, postdocs, and faculty have worked hard during the installation and commissioning period and we continue to now put much of our effort into data analysis and related programming efforts. \\
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The experiment began production running in the Fall of 2010 and is expected to reach its goal statistical error in May 2012. \\
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More detailed information about the experiment and our work on it can obtained by following the menu links at the top of the page.

This is the Moller Experiment