Status of the NPDGamma experiment

doi:https://doi.org/10.1007/s10751-016-1376-4

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:

; Alarcon, R.; Allen, R.; Askanazi, E.; Balascuta, S.; Barron-Palos, L.; Baeßler, S.; Barzilov, A.;

; Blyth, D.;

; Calarco, J. R.; Chupp, T. E.; Coppola, C. E.; Crawford, C.; Craycraft, K.; Dabaghyan, M.; Evans, D.; Favela, J.; Fieseler, C. more »

Publication Date:: 2016-12-27

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.

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                    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

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                    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.

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@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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Works referenced in this record:

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Title: Status of the NPDGamma experiment

Abstract

Citation Formats

Hadronic Parity Violation: A New View Through the Looking Glass journal, November 2006

Parity-violating observables of two-nucleon systems in effective field theory journal, June 2007

Search for parity violation in the 1081 keV gamma transition of 18F journal, December 1982

Measurement of parity-violating γ -ray asymmetry in the capture of polarized cold neutrons on protons journal, January 2011

Weak pion-nucleon coupling strength: New constraint from parity mixing in F 18 journal, March 1987

Δ contributions to the parity-violating nuclear interaction journal, February 1991

An effective-field-theory analysis of low-energy parity-violation in nucleon–nucleon scattering journal, May 2009

Search for the Circular Polarization of the 1081-keV Gamma Ray in F 18 journal, August 1985

Parity Violation in the Nucleon-Nucleon Interaction journal, December 1985

Search for Neutral-Weak-Current Effects in the Nucleus F 18 journal, March 1978

The theory of parity violation in few-nucleon systems journal, September 2013

Formation of parity-nonconserving nuclear forces in the standard model SU(2)L × U(1) × SU(3)c journal, November 1986

Parity Nonconservation in F 18 and Meson-Exchange Contributions to the Axial Charge Operator journal, March 1981

Unified treatment of the parity violating nuclear force journal, February 1980

Hadronic Parity Violation: A New View Through the Looking Glass
journal, November 2006

Parity-violating observables of two-nucleon systems in effective field theory
journal, June 2007

Search for parity violation in the 1081 keV gamma transition of 18F
journal, December 1982

Measurement of parity-violating $γ$ -ray asymmetry in the capture of polarized cold neutrons on protons
journal, January 2011

Weak pion-nucleon coupling strength: New constraint from parity mixing in ${}^{18}F$
journal, March 1987

Δ contributions to the parity-violating nuclear interaction
journal, February 1991

An effective-field-theory analysis of low-energy parity-violation in nucleon–nucleon scattering
journal, May 2009

Search for the Circular Polarization of the 1081-keV Gamma Ray in ${}^{18}F$
journal, August 1985

Parity Violation in the Nucleon-Nucleon Interaction
journal, December 1985

Search for Neutral-Weak-Current Effects in the Nucleus ${}^{18}F$
journal, March 1978

The theory of parity violation in few-nucleon systems
journal, September 2013

Formation of parity-nonconserving nuclear forces in the standard model SU(2)L × U(1) × SU(3)c
journal, November 1986

Parity Nonconservation in ${}^{18}F$ and Meson-Exchange Contributions to the Axial Charge Operator
journal, March 1981

Unified treatment of the parity violating nuclear force
journal, February 1980