The QPweak Experiment:
| QPweak will measure the parity violating asymmetry in the number of ~1 GeV polarized electrons, scattered at forward angles from protons in a high power liquid hydrogen target. The goal is to measure this asymmetry with an error of 2.5%. At that accuracy, the measurement will determine the so called weak charge of the proton (QPweak) with an error of 4.1% (see theory), making this a sensitive test of new physics beyond the Standard Model. QPweak is currently taking data in Hall C at Jefferson Laboratory. | Attach:ExpStatusSlideShowNonStopCycle.swf Δ |
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.
The experiment began production running in the Fall of 2010 and is expected to reach its goal statistical error in May 2012.
More detailed information about the experiment and our work on it can obtained by following the menu links at the top of the page.