Q[subscript weak]: First Direct Measurement of the Proton’s Weak Charge

Androic, D.; Armstrong, D.S.; Asaturyan, A.; Averett, T.; Balewski, J.; Bartlett, K.; Beaufait, J.; Beminiwattha, R.S.; Benesch, J.; Benmokhtar, F.; Birchall, J.; Carlini, R.D.; Cates, G.D.; Cornejo, J.C.; Covrig, S.; Dalton, M.M.; Davis, C.A.; Deconinck, W.; Diefenbach, J.; Dowd, J.F.; Dunne, J.A.; Dutta, D.; Duvall, W.S.; Elaasar, M.; Falk, W.R.; Finn, J.M.; Forest, T.; Gal, C.; Gaskell, D.; Gericke, M.T.W.; Grames, J.; Gray, V.M.; Grimm, K.; Guo, F.; Hoskins, J.R.; Johnston, K.; Jones, D.; Jones, M.; Jones, R.; Kargiantoulakis, M.; King, P.M.; Korkmaz, E.; Kowalski, S.; Leacock, J.; Leckey, J.; Lee, A.R.; Lee, J.H.; Lee, L.; MacEwan, S.; Mack, D.; Magee, J.A.; Mahurin, R.; Mammei, J.; Martin, J.W.; McHugh, M.J.; Meekins, D.; Mei, J.; Michaels, R.; Micherdzinska, A.; Mkrtchyan, A.; Mkrtchyan, H.; Morgan, N.; Myers, K.E.; Narayan, A.; Ndukum, L.Z.; Nelyubin, V.; Nuhait, H.; Nuruzzaman, H.; van Oers, W.T.H; Opper, A.K.; Page, S.A.; Pan, J.; Paschke, K.D.; Phillips, S.K.; Pitt, M.L.; Poelker, M.; Rajotte, J.F.; Ramsay, W.D.; Roche, J.; Sawatzky, B.; Seva, T.; Shabestari, M.H.; Silwal, R.; Simicevic, N.; Smith, G.R.; Solvignon, P.; Spayde, D.T.; Subedi, A.; Subedi, R.; Suleiman, R.; Tadevosyan, V.; Tobias, W.A.; Tvaskis, V.; Waidyawansa, B.; Wang, P.; Wells, S.P.; Wood, S.A.; Yang, S.; Young, R.D.; Zang, P.; Zhamkochyan, S.

Author(s)

Balewski, Jan T.; Guo, Fang; Kowalski, Stanley B; Rajotte, Jean-Francois

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Q[subscript weak]: First Direct Measurement of the Proton’s Weak Charge

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Creative Commons Attribution 4.0 International License http://creativecommons.org/licenses/by/4.0

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Abstract

The Q[subscript weak] experiment, which took data at Jefferson Lab in the period 2010 - 2012, will precisely determine the weak charge of the proton by measuring the parity-violating asymmetry in elastic e-p scattering at 1.1 GeV using a longitudinally polarized electron beam and a liquid hydrogen target at a low momentum transfer of Q² = 0.025 (GeV/c)². The weak charge of the proton is predicted by the Standard Model and any significant deviation would indicate physics beyond the Standard Model. The technical challenges and experimental apparatus for measuring the weak charge of the proton will be discussed, as well as the method of extracting the weak charge of the proton. The results from a small subset of the data, that has been published, will also be presented. Furthermore an update will be given of the current status of the data analysis.

Date issued

2017-03

URI

https://hdl.handle.net/1721.1/113330.2

Department

Massachusetts Institute of Technology. Department of Physics; Massachusetts Institute of Technology. Laboratory for Nuclear Science

Journal

EPJ Web of Conferences

Publisher

EDP Sciences

Citation

Androic, D. et al. “Q[subscript weak]: First Direct Measurement of the Proton’s Weak Charge.” Edited by Y. Foka, N. Brambilla, and V. Kovalenko. EPJ Web of Conferences 137 (2017): 08005 © 2017 The Authors

Version: Final published version

ISSN

2100-014X

Collections

MIT Open Access Articles

Version	Item	Date	Summary
2	1721.1/113330.2*	2021-09-08T17:47:16Z	Verified/edited publication information.
1	1721.1/113330	2018-01-29T18:56:15Z

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