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Title: The tracking analysis in the Q-weak experiment

Here, the Q-weak experiment at Jefferson Laboratory measured the parity violating asymmetry (A$$_{PV}$$ ) in elastic electron-proton scattering at small momentum transfer squared (Q$$^{2}$$=0.025 (G e V/c)$$^{2}$$), with the aim of extracting the proton’s weak charge ( $${Q^p_W}$$ ) to an accuracy of 5 %. As one of the major uncertainty contribution sources to $${Q^p_W}$$ , Q$$^{2}$$ needs to be determined to ~1 % so as to reach the proposed experimental precision. For this purpose, two sets of high resolution tracking chambers were employed in the experiment, to measure tracks before and after the magnetic spectrometer. Data collected by the tracking system were then reconstructed with dedicated software into individual electron trajectories for experimental kinematics determination. The Q-weak kinematics and the analysis scheme for tracking data are briefly described here. The sources that contribute to the uncertainty of Q$$^{2}$$ are discussed, and the current analysis status is reported.
Authors:
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Publication Date:
Report Number(s):
JLAB-PHY-16-2372; DOE/OR/23177-4060
Journal ID: ISSN 0304-3843; PII: 1369; TRN: US1701235
Grant/Contract Number:
AC05-06OR23177
Type:
Accepted Manuscript
Journal Name:
Hyperfine Interactions
Additional Journal Information:
Journal Volume: 237; Journal Issue: 1; Conference: SSP 2015, Victoria, BC (Canada), 8-12 Jun 2015; Journal ID: ISSN 0304-3843
Publisher:
Springer
Research Org:
Thomas Jefferson National Accelerator Facility, Newport News, VA (United States)
Sponsoring Org:
USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)
Contributing Orgs:
Q-weak Collaboration
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; parity violating asymmetry; momentum transfer; kinematics
OSTI Identifier:
1341001

Pan, J., 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., Dunne, J. A., Dutta, D., Duvall, W. S., Elaasar, M., Falk, W. R., Finn, J. M., Forest, T., 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., Nuruzzaman,, 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., and Zhamkochyan, S.. The tracking analysis in the Q-weak experiment. United States: N. p., Web. doi:10.1007/s10751-016-1369-3.
Pan, J., 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., Dunne, J. A., Dutta, D., Duvall, W. S., Elaasar, M., Falk, W. R., Finn, J. M., Forest, T., 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., Nuruzzaman,, 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., & Zhamkochyan, S.. The tracking analysis in the Q-weak experiment. United States. doi:10.1007/s10751-016-1369-3.
Pan, J., 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., Dunne, J. A., Dutta, D., Duvall, W. S., Elaasar, M., Falk, W. R., Finn, J. M., Forest, T., 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., Nuruzzaman,, 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., and Zhamkochyan, S.. 2016. "The tracking analysis in the Q-weak experiment". United States. doi:10.1007/s10751-016-1369-3. https://www.osti.gov/servlets/purl/1341001.
@article{osti_1341001,
title = {The tracking analysis in the Q-weak experiment},
author = {Pan, J. and Androic, D. and Armstrong, D. S. and Asaturyan, A. and Averett, T. and Balewski, J. and Beaufait, J. and Beminiwattha, R. S. and Benesch, J. and Benmokhtar, F. and Birchall, J. and Carlini, R. D. and Cates, G. D. and Cornejo, J. C. and Covrig, S. and Dalton, M. M. and Davis, C. A. and Deconinck, W. and Diefenbach, J. and Dowd, J. F. and Dunne, J. A. and Dutta, D. and Duvall, W. S. and Elaasar, M. and Falk, W. R. and Finn, J. M. and Forest, T. and Gaskell, D. and Gericke, M. T. W. and Grames, J. and Gray, V. M. and Grimm, K. and Guo, F. and Hoskins, J. R. and Johnston, K. and Jones, D. and Jones, M. and Jones, R. and Kargiantoulakis, M. and King, P. M. and Korkmaz, E. and Kowalski, S. and Leacock, J. and Leckey, J. and Lee, A. R. and Lee, J. H. and Lee, L. and MacEwan, S. and Mack, D. and Magee, J. A. and Mahurin, R. and Mammei, J. and Martin, J. W. and McHugh, M. J. and Meekins, D. and Mei, J. and Michaels, R. and Micherdzinska, A. and Mkrtchyan, A. and Mkrtchyan, H. and Morgan, N. and Myers, K. E. and Narayan, A. and Ndukum, L. Z. and Nelyubin, V. and Nuruzzaman, and van Oers, W. T. H. and Opper, A. K. and Page, S. A. and Pan, J. and Paschke, K. D. and Phillips, S. K. and Pitt, M. L. and Poelker, M. and Rajotte, J. F. and Ramsay, W. D. and Roche, J. and Sawatzky, B. and Seva, T. and Shabestari, M. H. and Silwal, R. and Simicevic, N. and Smith, G. R. and Solvignon, P. and Spayde, D. T. and Subedi, A. and Subedi, R. and Suleiman, R. and Tadevosyan, V. and Tobias, W. A. and Tvaskis, V. and Waidyawansa, B. and Wang, P. and Wells, S. P. and Wood, S. A. and Yang, S. and Young, R. D. and Zhamkochyan, S.},
abstractNote = {Here, the Q-weak experiment at Jefferson Laboratory measured the parity violating asymmetry (A$_{PV}$ ) in elastic electron-proton scattering at small momentum transfer squared (Q$^{2}$=0.025 (G e V/c)$^{2}$), with the aim of extracting the proton’s weak charge ( ${Q^p_W}$ ) to an accuracy of 5 %. As one of the major uncertainty contribution sources to ${Q^p_W}$ , Q$^{2}$ needs to be determined to ~1 % so as to reach the proposed experimental precision. For this purpose, two sets of high resolution tracking chambers were employed in the experiment, to measure tracks before and after the magnetic spectrometer. Data collected by the tracking system were then reconstructed with dedicated software into individual electron trajectories for experimental kinematics determination. The Q-weak kinematics and the analysis scheme for tracking data are briefly described here. The sources that contribute to the uncertainty of Q$^{2}$ are discussed, and the current analysis status is reported.},
doi = {10.1007/s10751-016-1369-3},
journal = {Hyperfine Interactions},
number = 1,
volume = 237,
place = {United States},
year = {2016},
month = {11}
}