[Jlab-seminars] Today's Physics Seminar: Donald Jones; " The Qweak Experiment: Its Physics Significance and Legacy"

[Stephanie Tysor]

*Physics Seminar*

*Donald Jones*

*University of Virginia*

**

///" The Qweak Experiment: Its Physics Significance and Legacy"/

*Abstract*

Over the past decade Jefferson Lab has maintained a vigorous 
parity-violating physics program using the signature of the weak 
interaction to probe both nuclear and nucleonic structure. 
Parity-violating experiments have developed a reputation for their 
increasingly rigorous demands on measurement precision and on electron 
beam quality. Many of those requirements have been met by the science 
and engineering teams at Jefferson Lab along with their partnering 
researchers from around the world. The parity program is now at the 
level of precision where it can test key predictions of the Standard 
Model. The most recent parity violating experiment at Jefferson Lab was 
the Qweak experiment which measured the world's smallest elastic 
electron-proton parity violating asymmetry to date to unprecedented 
precision. With an initial release of 4% of the full data set and the 
final publication of results only a few months away, this experiment 
provides the world's first determination of the weak charge of the 
proton and a test of the Standard Model prediction of the running of the 
weak mixing angle. Achievements, difficulties and surprises encountered 
during Qweak further provide technical insights that are key for future 
precision experiments scheduled at Jefferson Lab. I give an overview of 
the operation and physics case for the Qweak experiment with particular 
focus on its legacy for future experiments.

Monday, July 20, 2015

11:00am

CEBAF F326/327

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