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Title: Status of the NPDGamma experiment

Abstract

We report that the NPDGamma experiment measures the parity-violating (PV) gamma asymmetry from polarized cold neutrons captured on protons at the Spallation Neutron Source (SNS) at Oak Ridge National Laboratory (ORNL). The (PV) neutron spin asymmetry A γ of photons from polarized cold neutron capture on protons is proportional to the ΔI=1 long range weak meson coupling h$$1\atop{π}$$ between nucleons in the hadronic weak interaction (HWI). Liquid para-hydrogen production data taking concluded in April 2014 and once the background aluminum asymmetry measurements are complete, the PV asymmetry A γ can be extracted. Finally, preliminary results of the analysis of A γ are presented.

Authors:
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Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)
Contributing Org.:
NPDGamma collaboration
OSTI Identifier:
1479711
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Hyperfine Interactions
Additional Journal Information:
Journal Volume: 238; Journal Issue: 1; Journal ID: ISSN 0304-3843
Publisher:
Springer
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; Nucleon-nucleon interactions; Parity-violation; Nuclear tests of fundamental symmetries; Few nucleon systems

Citation Formats

Fry, J., Alarcon, R., Allen, R., Askanazi, E., Balascuta, S., Barron-Palos, L., Baeßler, S., Barzilov, A., Blessinger, C., Blyth, D., Bowman, J. D., Calarco, J. R., Chupp, T. E., Coppola, C. E., Crawford, C., Craycraft, K., Dabaghyan, M., Evans, D., Favela, J., Fieseler, C., Fomin, N., Fox, W., Freedman, S., Frlež, E., Fu, C., Garcia, C., Garishvili, I., Gericke, M. T., Gillis, R. C., Grammer, K., Greene, G. L., Hamblen, J., Hayes, C., Hersman, F. W., Ino, T., Iverson, E. B., Jones, G. L., Kabir, L., Kucucker, S., Lauss, B., Li, Y., Mahurin, R., Maldonado-Velazquez, M., McCrea, M., Masuda, Y., Mei, J., Milburn, R., Mitchell, G. S., Mueller, P., Muto, S., Musgrave, M., Nann, H., Novikov, I., Page, S., Parsons, D., Počanić, D., Penttilä, S. I., Ramsay, W. D., Salas-Bacci, A., Santra, S., Seo, P. -N., Sharapov, E., Sharma, M., Simmons, F., Smith, T., Snow, W. M., Stuart, J., Tang, E., Tang, Z., Thomison, J., Tong, T., Vanderwerp, J., Waldecker, S., Wilburn, W. S., Xu, W., Yuan, V., and Zhang, Y. Status of the NPDGamma experiment. United States: N. p., 2016. Web. doi:10.1007/s10751-016-1376-4.
Fry, J., Alarcon, R., Allen, R., Askanazi, E., Balascuta, S., Barron-Palos, L., Baeßler, S., Barzilov, A., Blessinger, C., Blyth, D., Bowman, J. D., Calarco, J. R., Chupp, T. E., Coppola, C. E., Crawford, C., Craycraft, K., Dabaghyan, M., Evans, D., Favela, J., Fieseler, C., Fomin, N., Fox, W., Freedman, S., Frlež, E., Fu, C., Garcia, C., Garishvili, I., Gericke, M. T., Gillis, R. C., Grammer, K., Greene, G. L., Hamblen, J., Hayes, C., Hersman, F. W., Ino, T., Iverson, E. B., Jones, G. L., Kabir, L., Kucucker, S., Lauss, B., Li, Y., Mahurin, R., Maldonado-Velazquez, M., McCrea, M., Masuda, Y., Mei, J., Milburn, R., Mitchell, G. S., Mueller, P., Muto, S., Musgrave, M., Nann, H., Novikov, I., Page, S., Parsons, D., Počanić, D., Penttilä, S. I., Ramsay, W. D., Salas-Bacci, A., Santra, S., Seo, P. -N., Sharapov, E., Sharma, M., Simmons, F., Smith, T., Snow, W. M., Stuart, J., Tang, E., Tang, Z., Thomison, J., Tong, T., Vanderwerp, J., Waldecker, S., Wilburn, W. S., Xu, W., Yuan, V., & Zhang, Y. Status of the NPDGamma experiment. United States. https://doi.org/10.1007/s10751-016-1376-4
Fry, J., Alarcon, R., Allen, R., Askanazi, E., Balascuta, S., Barron-Palos, L., Baeßler, S., Barzilov, A., Blessinger, C., Blyth, D., Bowman, J. D., Calarco, J. R., Chupp, T. E., Coppola, C. E., Crawford, C., Craycraft, K., Dabaghyan, M., Evans, D., Favela, J., Fieseler, C., Fomin, N., Fox, W., Freedman, S., Frlež, E., Fu, C., Garcia, C., Garishvili, I., Gericke, M. T., Gillis, R. C., Grammer, K., Greene, G. L., Hamblen, J., Hayes, C., Hersman, F. W., Ino, T., Iverson, E. B., Jones, G. L., Kabir, L., Kucucker, S., Lauss, B., Li, Y., Mahurin, R., Maldonado-Velazquez, M., McCrea, M., Masuda, Y., Mei, J., Milburn, R., Mitchell, G. S., Mueller, P., Muto, S., Musgrave, M., Nann, H., Novikov, I., Page, S., Parsons, D., Počanić, D., Penttilä, S. I., Ramsay, W. D., Salas-Bacci, A., Santra, S., Seo, P. -N., Sharapov, E., Sharma, M., Simmons, F., Smith, T., Snow, W. M., Stuart, J., Tang, E., Tang, Z., Thomison, J., Tong, T., Vanderwerp, J., Waldecker, S., Wilburn, W. S., Xu, W., Yuan, V., and Zhang, Y. Tue . "Status of the NPDGamma experiment". United States. https://doi.org/10.1007/s10751-016-1376-4. https://www.osti.gov/servlets/purl/1479711.
@article{osti_1479711,
title = {Status of the NPDGamma experiment},
author = {Fry, J. and Alarcon, R. and Allen, R. and Askanazi, E. and Balascuta, S. and Barron-Palos, L. and Baeßler, S. and Barzilov, A. and Blessinger, C. and Blyth, D. and Bowman, J. D. and Calarco, J. R. and Chupp, T. E. and Coppola, C. E. and Crawford, C. and Craycraft, K. and Dabaghyan, M. and Evans, D. and Favela, J. and Fieseler, C. and Fomin, N. and Fox, W. and Freedman, S. and Frlež, E. and Fu, C. and Garcia, C. and Garishvili, I. and Gericke, M. T. and Gillis, R. C. and Grammer, K. and Greene, G. L. and Hamblen, J. and Hayes, C. and Hersman, F. W. and Ino, T. and Iverson, E. B. and Jones, G. L. and Kabir, L. and Kucucker, S. and Lauss, B. and Li, Y. and Mahurin, R. and Maldonado-Velazquez, M. and McCrea, M. and Masuda, Y. and Mei, J. and Milburn, R. and Mitchell, G. S. and Mueller, P. and Muto, S. and Musgrave, M. and Nann, H. and Novikov, I. and Page, S. and Parsons, D. and Počanić, D. and Penttilä, S. I. and Ramsay, W. D. and Salas-Bacci, A. and Santra, S. and Seo, P. -N. and Sharapov, E. and Sharma, M. and Simmons, F. and Smith, T. and Snow, W. M. and Stuart, J. and Tang, E. and Tang, Z. and Thomison, J. and Tong, T. and Vanderwerp, J. and Waldecker, S. and Wilburn, W. S. and Xu, W. and Yuan, V. and Zhang, Y.},
abstractNote = {We report that the NPDGamma experiment measures the parity-violating (PV) gamma asymmetry from polarized cold neutrons captured on protons at the Spallation Neutron Source (SNS) at Oak Ridge National Laboratory (ORNL). The (PV) neutron spin asymmetry A γ of photons from polarized cold neutron capture on protons is proportional to the ΔI=1 long range weak meson coupling h$1\atop{π}$ between nucleons in the hadronic weak interaction (HWI). Liquid para-hydrogen production data taking concluded in April 2014 and once the background aluminum asymmetry measurements are complete, the PV asymmetry A γ can be extracted. Finally, preliminary results of the analysis of A γ are presented.},
doi = {10.1007/s10751-016-1376-4},
url = {https://www.osti.gov/biblio/1479711}, journal = {Hyperfine Interactions},
issn = {0304-3843},
number = 1,
volume = 238,
place = {United States},
year = {2016},
month = {12}
}

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