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Louisiana Tech University


Center for Applied Physics

QWEAK Experiment

QWEAK Experiment

The Qweak is an international collaboration experiment at the Thomas Jefferson National Accelerator Facility in Virginia. The purpose of Qweak is to measure the weak mixing angle at high precision and look for new physics beyond the Standard Model. The weak force plays important role in processes of nuclear decays but is difficult to measure. The Louisiana Tech University is responsible for the construction and installation of the forward tracking chamber for Qweak.

Read more about the Qweak collaboration on the facility website.

Research Highlights

Data Rotated to the Forward-Angle LimitIn 2013 the Qweak collaboration (including the CAPS faculty Dr. Wells, Dr. Simicevic and Dr. Johnston) reported in Physical Review Letters the first measurement of the weak charge of the proton. The measurement, based on just 4% of the available data, is in agreement with the theoretical prediction of the Standard Model. Still, further analysis using all of the acquired data may potentially reveal a discrepancy with the theory which would be evidence of new physics.

In 2013 the Qweak collaboration (including the CAPS faculty Dr. Wells, Dr. Simicevic and Dr. Johnston) reported in Physical Review Letters the first measurement of the weak charge of the proton. The measurement, based on just 4% of the available data, is in agreement with the theoretical prediction of the Standard Model. Still, further analysis using all of the acquired data may potentially reveal a discrepancy with the theory which would be evidence of new physics.

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