The Q{sub weak} Experiment at Jefferson Lab--A Search for New Physics at the TeV Scale
- Institute for Particle, Nuclear, and Astronomical Sciences and Department of Physics, Virginia Tech, Blacksburg, VA 24061 (United States)
The Q{sub weak} collaboration will make the first precision determination of the proton's weak charge, Q{sub W}{sup P} = 1-4 sin{sup 2} {theta}{sub w}, 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 Q{sub W}{sup P}, based on the running of the weak mixing angle, sin{sup 2} {theta}{sub w}, from the Z{sup 0} pole down to low energies, corresponding to a 10{sigma} effect in this experiment. Any significant deviation of sin{sup 2} {theta}{sub w} from the Standard Model prediction at low Q{sup 2} 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.
- OSTI ID:
- 21325728
- Journal Information:
- AIP Conference Proceedings, Vol. 1182, Issue 1; Conference: 10. conference on the intersections of particle and nuclear physics, San Diego, CA (United States), 26-31 May 2009; Other Information: DOI: 10.1063/1.3293906; (c) 2009 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
- Country of Publication:
- United States
- Language:
- English
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