STI Publications - View Publication Form #12760
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Publication Information
| Title | The Q weak experiment: A search for new physics at the TeV scale via a measurement of the proton's weak charge | ||||
| Abstract | After a decade of preparations, the Qweak experiment at Jefferson Lab is making the first direct measurement of the weak charge of the proton, QpW . Because this quantity is suppressed in the Standard Model, a 4% result will significantly constrain new physics at the TeV scale while providing the most precise measurement of sin2¸W at low energies. Operationally, we measure the small (<-200 ppb) parity-violating asymmetry in electron-proton scattering in integrating mode while flipping the longitudinal polarization of the electrons up to 1000 times per second. Potential sources of new, parity-violating interactions between electrons and light quarks include a Z', leptoquarks, and R-parity-violating SUSY. Our proton measurement provides isospin constraints which are nearly orthogonal to, and thus completely complementary to, older precise Cs APV data. Commissioning took place Fall 2010, and we completed Run I in May 2011 with 1/4 the statistics goal. After a 6 month shutdown, Run II beg | ||||
| Author(s) | Rakitha Beminiwattha | ||||
| Publication Date | October 2013 | ||||
| Document Type | Meeting, Proceedings | ||||
| Primary Institution | Thomas Jefferson National Accelerator Facility, Newport News | ||||
| Affiliation | Exp Nuclear Physics / Experimental Halls / Hall C | ||||
| Funding Source | |||||
| Proprietary? | No | ||||
| This publication conveys | Technical Science Results | ||||
| Document Numbers |
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| Associated with an experiment | No | ||||
| Associated with EIC | No | ||||
| Supported by Jefferson Lab LDRD Funding | No |
Meeting / Conference
| Meeting Name | CIPANP 2012 |
| Meeting Date | 5/29/2012 |
| Document Subtype | Paper (proceedings only) |
Proceedings
| Title | CIPANP 2012, AIP Conf. Proc. 1560 |
| Editor(s) | Bonnie Fleming |
| Publisher | AIP |
| Refereed | No |
| Page Number | 243 |
| Year | 2013 |
Attachments/Datasets/DOI Link
| Document(s) | (none) |
| DOI Link | |
| Dataset(s) | (none) |
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