The Qweak Experiment at Jefferson Lab—A Search for New Physics at the TeV Scale
- Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
The Qweak collaboration will make the first precision determination of the proton's weak charge, QWP = 1-4 sin2 thetaw, from a measurement of the parity-violating asymmetry in elastic electron-proton scattering at very low momentum transfer. The results will determine the proton's weak charge with a 4% total error. The Standard Model makes a firm prediction of QWP, based on the running of the weak mixing angle, sin2 thetaw, from the Z0 pole down to low energies, corresponding to a 10sigma effect in this experiment. Any significant deviation of sin2 thetaw from the Standard Model prediction at low Q2 would be a signal of new physics, wheras agreement would place new and significant constraints on possible Standard Model extensions at the TeV mass scale.
- Research Organization:
- Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC)
- DOE Contract Number:
- AC05-06OR23177
- OSTI ID:
- 985393
- Report Number(s):
- JLAB-PHY-09-923; DOE/OR/23177-0894; TRN: US1006128
- Journal Information:
- AIP Conference Proceedings, Vol. 1182; Conference: CIPANP 2009: 10th Conference On The Intersections Of Particle And Nuclear Physics, 26-31 May 2009, San Diego, California
- Country of Publication:
- United States
- Language:
- English
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