Qweak: A search for new physics status update
Qweak is a currently running experiment at the Thomas Jefferson National Accelerator Facility that uses parity-violating elastic electron-proton scattering to measure the weak charge of the proton (Q{sub weak}{sup P}). This experiment is a sensitive test for physics beyond the Standard Model, as Q{sub weak}{sup P} is well predicted in the Standard Model. Qweak will measure an expected {approx}200 ppb asymmetry to 4% and will be the first direct measurement of Q{sub weak}{sup P}. The precision generated will allow the probing of certain classes of new physics up to 2.5 TeV. Longitudinally polarized electrons are scattered off a liquid hydrogen target and pass through a toroidal-field magnetic spectrometer. The 4% measurement requires 2500 hours of 85% polarized electron beam. In this paper, the design and status of the complete experiment including the details of the asymmetry measurements will be discussed.
- 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:
- 1040849
- Report Number(s):
- JLAB-PHY-12-1512; DOE/OR/23177-2161; TRN: US1202578
- Journal Information:
- AIP Conf. Proc., Vol. 1423; Conference: IX LATIN AMERICAN SYMPOSIUM ON NUCLEAR PHYSICS AND APPLICATIONS, 18–22 July 2011,Quito, Ecuador
- Country of Publication:
- United States
- Language:
- English
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Qweak - A Search For New Physics
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