Early results from the Qweak experiment

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

doi:10.1051/epjconf/20146605002

Early results from the Q_weak experiment

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

Research output: Contribution to journal › Conference article › peer-review

Abstract

A subset of results from the recently completed Jefferson Lab Qweak experiment are reported. This experiment, sensitive to physics beyond the Standard Model, exploits the small parity-violating asymmetry in elastic ep scattering to provide the first determination of the proton's weak charge Q _w^p. The experiment employed a 180 μA longitudinally polarized 1.16 GeV electron beam on a 35 cm long liquid hydrogen target. Scattered electrons in the angular range 6° < θ < 12° corresponding to Q² = 0.025 GeV² were detected in eight Cerenkov detectors arrayed symmetrically around the beam axis. The goals of the experiment were to provide a measure of ep to 4.2% (combined statisstatistical and systematic error), which implies a measure of sin²(θ _w) at the level of 0.3%, and to help constrain the vector weak quark charges C_1u and C_1d. The experimental method is described, with particular focus on the challenges associated with the world's highest power LH₂ target. The new constraints on C_1u and C _1d provided by the subset of the experiment's data analyzed to date will also be shown, together with the extracted weak charge of the neutron.

Original language	English
Article number	05002
Journal	EPJ Web of Conferences
Volume	66
DOIs	https://doi.org/10.1051/epjconf/20146605002
Publication status	Published - 14 Apr 2014
Externally published	Yes
Event	2013 International Nuclear Physics Conference, INPC 2013 - Firenze, Italy Duration: 2 Jun 2013 → 7 Jun 2013

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10.1051/epjconf/20146605002

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Androic, D., Armstrong, D. S., Asaturyan, A., Averett, T., Balewski, J., 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., ... Zhamkochyan, S. (2014). Early results from the Q_weak experiment. EPJ Web of Conferences, 66, Article 05002. https://doi.org/10.1051/epjconf/20146605002

@article{2159d28743aa4f2b95cc6823c3ead2ff,

title = "Early results from the Qweak experiment",

abstract = "A subset of results from the recently completed Jefferson Lab Qweak experiment are reported. This experiment, sensitive to physics beyond the Standard Model, exploits the small parity-violating asymmetry in elastic ep scattering to provide the first determination of the proton's weak charge Q wp. The experiment employed a 180 μA longitudinally polarized 1.16 GeV electron beam on a 35 cm long liquid hydrogen target. Scattered electrons in the angular range 6° < θ < 12° corresponding to Q2 = 0.025 GeV2 were detected in eight Cerenkov detectors arrayed symmetrically around the beam axis. The goals of the experiment were to provide a measure of ep to 4.2\% (combined statisstatistical and systematic error), which implies a measure of sin2(θ w) at the level of 0.3\%, and to help constrain the vector weak quark charges C1u and C1d. The experimental method is described, with particular focus on the challenges associated with the world's highest power LH2 target. The new constraints on C1u and C 1d provided by the subset of the experiment's data analyzed to date will also be shown, together with the extracted weak charge of the neutron.",

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

year = "2014",

month = apr,

day = "14",

doi = "10.1051/epjconf/20146605002",

language = "English",

volume = "66",

journal = "EPJ Web of Conferences",

issn = "2101-6275",

note = "2013 International Nuclear Physics Conference, INPC 2013 ; Conference date: 02-06-2013 Through 07-06-2013",

}

Androic, D, Armstrong, DS, Asaturyan, A, Averett, T, Balewski, J, Beaufait, J, Beminiwattha, RS, Benesch, J, Benmokhtar, F, Birchall, J, Carlini, RD, Cates, GD, Cornejo, JC, Covrig, S, Dalton, MM, Davis, CA, Deconinck, W, Diefenbach, J, Dowd, JF, Dunne, JA, Dutta, D, Duvall, WS, Elaasar, M, Falk, WR, Finn, JM, Forest, T, Gaskell, D, Gericke, MTW, Grames, J, Gray, VM, Grimm, K, Guo, F, Hoskins, JR, Johnston, K, Jones, D, Jones, M, Jones, R, Kargiantoulakis, M, King, PM, Korkmaz, E, Kowalski, S, Leacock, J, Leckey, J, Lee, AR, Lee, JH, Lee, L, Macewan, S, Mack, D, Magee, JA, Mahurin, R, Mammei, J, Martin, J, McHugh, MJ, Meekins, D, Mei, J, Michaels, R, Micherdzinska, A, Mkrtchyan, A, Mkrtchyan, H, Morgan, N, Myers, KE, Narayan, A, Ndukum, LZ, Nelyubin, V, Nuruzzaman, A, Van Oers, WTH, Opper, AK, Page, SA, Pan, J, Paschke, K, Phillips, SK, Pitt, ML, Poelker, M, Rajotte, JF, Ramsay, WD, Roche, J, Sawatzky, B, Seva, T, Shabestari, MH, Silwal, R, Simicevic, N, Smith, GR, Solvignon, P, Spayde, DT, Subedi, A, Subedi, R, Suleiman, R, Tadevosyan, V, Tobias, WA, Tvaskis, V, Waidyawansa, B, Wang, P, Wells, SP, Wood, SA, Yang, S, Young, RD & Zhamkochyan, S 2014, 'Early results from the Q_weak experiment', EPJ Web of Conferences, vol. 66, 05002. https://doi.org/10.1051/epjconf/20146605002

TY - JOUR

T1 - Early results from the Qweak experiment

AU - Androic, D.

AU - Armstrong, D. S.

AU - Asaturyan, A.

AU - Averett, T.

AU - Balewski, J.

AU - Beaufait, J.

AU - Beminiwattha, R. S.

AU - Benesch, J.

AU - Benmokhtar, F.

AU - Birchall, J.

AU - Carlini, R. D.

AU - Cates, G. D.

AU - Cornejo, J. C.

AU - Covrig, S.

AU - Dalton, M. M.

AU - Davis, C. A.

AU - Deconinck, W.

AU - Diefenbach, J.

AU - Dowd, J. F.

AU - Dunne, J. A.

AU - Dutta, D.

AU - Duvall, W. S.

AU - Elaasar, M.

AU - Falk, W. R.

AU - Finn, J. M.

AU - Forest, T.

AU - Gaskell, D.

AU - Gericke, M. T.W.

AU - Grames, J.

AU - Gray, V. M.

AU - Grimm, K.

AU - Guo, F.

AU - Hoskins, J. R.

AU - Johnston, K.

AU - Jones, D.

AU - Jones, M.

AU - Jones, R.

AU - Kargiantoulakis, M.

AU - King, P. M.

AU - Korkmaz, E.

AU - Kowalski, S.

AU - Leacock, J.

AU - Leckey, J.

AU - Lee, A. R.

AU - Lee, J. H.

AU - Lee, L.

AU - Macewan, S.

AU - Mack, D.

AU - Magee, J. A.

AU - Mahurin, R.

AU - Mammei, J.

AU - Martin, J.

AU - McHugh, M. J.

AU - Meekins, D.

AU - Mei, J.

AU - Michaels, R.

AU - Micherdzinska, A.

AU - Mkrtchyan, A.

AU - Mkrtchyan, H.

AU - Morgan, N.

AU - Myers, K. E.

AU - Narayan, A.

AU - Ndukum, L. Z.

AU - Nelyubin, V.

AU - Nuruzzaman, A.

AU - Van Oers, W. T.H.

AU - Opper, A. K.

AU - Page, S. A.

AU - Pan, J.

AU - Paschke, K.

AU - Phillips, S. K.

AU - Pitt, M. L.

AU - Poelker, M.

AU - Rajotte, J. F.

AU - Ramsay, W. D.

AU - Roche, J.

AU - Sawatzky, B.

AU - Seva, T.

AU - Shabestari, M. H.

AU - Silwal, R.

AU - Simicevic, N.

AU - Smith, G. R.

AU - Solvignon, P.

AU - Spayde, D. T.

AU - Subedi, A.

AU - Subedi, R.

AU - Suleiman, R.

AU - Tadevosyan, V.

AU - Tobias, W. A.

AU - Tvaskis, V.

AU - Waidyawansa, B.

AU - Wang, P.

AU - Wells, S. P.

AU - Wood, S. A.

AU - Yang, S.

AU - Young, R. D.

AU - Zhamkochyan, S.

PY - 2014/4/14

Y1 - 2014/4/14

N2 - A subset of results from the recently completed Jefferson Lab Qweak experiment are reported. This experiment, sensitive to physics beyond the Standard Model, exploits the small parity-violating asymmetry in elastic ep scattering to provide the first determination of the proton's weak charge Q wp. The experiment employed a 180 μA longitudinally polarized 1.16 GeV electron beam on a 35 cm long liquid hydrogen target. Scattered electrons in the angular range 6° < θ < 12° corresponding to Q2 = 0.025 GeV2 were detected in eight Cerenkov detectors arrayed symmetrically around the beam axis. The goals of the experiment were to provide a measure of ep to 4.2% (combined statisstatistical and systematic error), which implies a measure of sin2(θ w) at the level of 0.3%, and to help constrain the vector weak quark charges C1u and C1d. The experimental method is described, with particular focus on the challenges associated with the world's highest power LH2 target. The new constraints on C1u and C 1d provided by the subset of the experiment's data analyzed to date will also be shown, together with the extracted weak charge of the neutron.

AB - A subset of results from the recently completed Jefferson Lab Qweak experiment are reported. This experiment, sensitive to physics beyond the Standard Model, exploits the small parity-violating asymmetry in elastic ep scattering to provide the first determination of the proton's weak charge Q wp. The experiment employed a 180 μA longitudinally polarized 1.16 GeV electron beam on a 35 cm long liquid hydrogen target. Scattered electrons in the angular range 6° < θ < 12° corresponding to Q2 = 0.025 GeV2 were detected in eight Cerenkov detectors arrayed symmetrically around the beam axis. The goals of the experiment were to provide a measure of ep to 4.2% (combined statisstatistical and systematic error), which implies a measure of sin2(θ w) at the level of 0.3%, and to help constrain the vector weak quark charges C1u and C1d. The experimental method is described, with particular focus on the challenges associated with the world's highest power LH2 target. The new constraints on C1u and C 1d provided by the subset of the experiment's data analyzed to date will also be shown, together with the extracted weak charge of the neutron.

U2 - 10.1051/epjconf/20146605002

DO - 10.1051/epjconf/20146605002

M3 - Conference article

AN - SCOPUS:84898767292

SN - 2101-6275

VL - 66

JO - EPJ Web of Conferences

JF - EPJ Web of Conferences

M1 - 05002

T2 - 2013 International Nuclear Physics Conference, INPC 2013

Y2 - 2 June 2013 through 7 June 2013

ER -

Early results from the Qweak experiment

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Early results from the Q_weak experiment