Improved limits on Fierz interference using asymmetry measurements from the Ultracold Neutron Asymmetry (UCNA) experiment

Sun, X.; Adamek, E.; Allgeier, B.; Bagdasarova, Y.; Berguno, D. B.; Blatnik, M.; Bowles, T. J.; Broussard, L. J.; Brown, M. A.-P.; Carr, R.; Clayton, S.; Cude-Woods, C.; Currie, S.; Dees, E. B.; Ding, X.; Filippone, B. W.; García, A.; Geltenbort, P.; Hasan, S.; Hickerson, K. P.; Hoagland, J.; Hong, R.; Holley, A. T.; Ito, T. M.; Knecht, A.; Liu, C. -Y.; Liu, J.; Makela, M.; Mammei, R.; Martin, J. W.; Melconian, D.; Mendenhall, M. P.; Moore, S. D.; Morris, C. L.; Nepal, S.; Nouri, N.; Pattie, R. W.; Pérez Gálvan, A.; Phillips, D. G.; Picker, R.; Pitt, M. L.; Plaster, B.; Salvat, D. J.; Saunders, A.; Sharapov, E. I.; Sjue, S.; Slutsky, S.; Sondheim, W.; Swank, C.; Tatar, E.; Vogelaar, R. B.; VornDick, B.; Wang, Z.; Wei, W.; Wexler, J. W.; Womack, T.; Wrede, C.; Young, A. R.; Zeck, B. A.

doi:10.1103/physrevc.101.035503

Title: Improved limits on Fierz interference using asymmetry measurements from the Ultracold Neutron Asymmetry (UCNA) experiment

Abstract

The Ultracold Neutron Asymmetry (UCNA) experiment was designed to measure the β-decay asymmetry parameter, A₀, for free neutron decay. In the experiment, polarized ultracold neutrons are transported into a decay trap, and their β-decay electrons are detected with ≈4π acceptance into two detector packages which provide position and energy reconstruction. The experiment also has sensitivity to b_n, the Fierz interference term in the neutron β-decay rate. In this work, we determine bn from the energy dependence of A₀ using the data taken during the UCNA 2011–2013 run. In addition, we present the same type of analysis using the earlier 2010 A dataset. Furthermore, motivated by improved statistics and comparable systematic errors compared to the 2010 data-taking run, we present a new b_n measurement using the weighted average of our asymmetry dataset fits, to obtain b_n = 0.066 ± 0.041_stat ± 0.024_syst which corresponds to a limit of -0.012 < b_n < 0.144 at the 90% confidence level.

Authors:

; Adamek, E.; Allgeier, B.; Bagdasarova, Y.; Berguno, D. B.; Blatnik, M.; Bowles, T. J.; Broussard, L. J.; Brown, M. A.-P.; Carr, R.; Clayton, S.; Cude-Woods, C.; Currie, S.; Dees, E. B.; Ding, X.; Filippone, B. W.; García, A.; Geltenbort, P.; Hasan, S.; Hickerson, K. P. more »

Publication Date:: Mon Mar 16 00:00:00 EDT 2020

Research Org.:: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

Sponsoring Org.:: USDOE Office of Science (SC), Nuclear Physics (NP); USDOE Laboratory Directed Research and Development (LDRD) Program; National Science Foundation (NSF)

Contributing Org.:: UCNA Collaboration

OSTI Identifier:: 1820879

Alternate Identifier(s):: OSTI ID: 1604864

Grant/Contract Number:: AC05-00OR22725; FG02-08ER41557; SC0014622; FG02-97ER41042; 20110043DR; 1002814; 1005233; 1205977; 1306997; 1307426; 1506459; 1615153; 1812340; 1914133

Resource Type:: Accepted Manuscript

Journal Name:: Physical Review C

Additional Journal Information:: Journal Volume: 101; Journal Issue: 3; Journal ID: ISSN 2469-9985

Publisher:: American Physical Society (APS)

Country of Publication:: United States

Language:: English

Subject:: 73 NUCLEAR PHYSICS AND RADIATION PHYSICS; Beta decay; Electroweak interactions in nuclear physics; Nuclear tests of fundamental interactions

Citation Formats


                    Sun, X., Adamek, E., Allgeier, B., Bagdasarova, Y., Berguno, D. B., Blatnik, M., Bowles, T. J., Broussard, L. J., Brown, M. A.-P., Carr, R., Clayton, S., Cude-Woods, C., Currie, S., Dees, E. B., Ding, X., Filippone, B. W., García, A., Geltenbort, P., Hasan, S., Hickerson, K. P., Hoagland, J., Hong, R., Holley, A. T., Ito, T. M., Knecht, A., Liu, C. -Y., Liu, J., Makela, M., Mammei, R., Martin, J. W., Melconian, D., Mendenhall, M. P., Moore, S. D., Morris, C. L., Nepal, S., Nouri, N., Pattie, R. W., Pérez Gálvan, A., Phillips, D. G., Picker, R., Pitt, M. L., Plaster, B., Salvat, D. J., Saunders, A., Sharapov, E. I., Sjue, S., Slutsky, S., Sondheim, W., Swank, C., Tatar, E., Vogelaar, R. B., VornDick, B., Wang, Z., Wei, W., Wexler, J. W., Womack, T., Wrede, C., Young, A. R., and Zeck, B. A. Improved limits on Fierz interference using asymmetry measurements from the Ultracold Neutron Asymmetry (UCNA) experiment.  United States: N. p., 2020. 
Web.  doi:10.1103/physrevc.101.035503.

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                    Sun, X., Adamek, E., Allgeier, B., Bagdasarova, Y., Berguno, D. B., Blatnik, M., Bowles, T. J., Broussard, L. J., Brown, M. A.-P., Carr, R., Clayton, S., Cude-Woods, C., Currie, S., Dees, E. B., Ding, X., Filippone, B. W., García, A., Geltenbort, P., Hasan, S., Hickerson, K. P., Hoagland, J., Hong, R., Holley, A. T., Ito, T. M., Knecht, A., Liu, C. -Y., Liu, J., Makela, M., Mammei, R., Martin, J. W., Melconian, D., Mendenhall, M. P., Moore, S. D., Morris, C. L., Nepal, S., Nouri, N., Pattie, R. W., Pérez Gálvan, A., Phillips, D. G., Picker, R., Pitt, M. L., Plaster, B., Salvat, D. J., Saunders, A., Sharapov, E. I., Sjue, S., Slutsky, S., Sondheim, W., Swank, C., Tatar, E., Vogelaar, R. B., VornDick, B., Wang, Z., Wei, W., Wexler, J. W., Womack, T., Wrede, C., Young, A. R., & Zeck, B. A. Improved limits on Fierz interference using asymmetry measurements from the Ultracold Neutron Asymmetry (UCNA) experiment.  United States.  https://doi.org/10.1103/physrevc.101.035503

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                    Sun, X., Adamek, E., Allgeier, B., Bagdasarova, Y., Berguno, D. B., Blatnik, M., Bowles, T. J., Broussard, L. J., Brown, M. A.-P., Carr, R., Clayton, S., Cude-Woods, C., Currie, S., Dees, E. B., Ding, X., Filippone, B. W., García, A., Geltenbort, P., Hasan, S., Hickerson, K. P., Hoagland, J., Hong, R., Holley, A. T., Ito, T. M., Knecht, A., Liu, C. -Y., Liu, J., Makela, M., Mammei, R., Martin, J. W., Melconian, D., Mendenhall, M. P., Moore, S. D., Morris, C. L., Nepal, S., Nouri, N., Pattie, R. W., Pérez Gálvan, A., Phillips, D. G., Picker, R., Pitt, M. L., Plaster, B., Salvat, D. J., Saunders, A., Sharapov, E. I., Sjue, S., Slutsky, S., Sondheim, W., Swank, C., Tatar, E., Vogelaar, R. B., VornDick, B., Wang, Z., Wei, W., Wexler, J. W., Womack, T., Wrede, C., Young, A. R., and Zeck, B. A. Mon .  
"Improved limits on Fierz interference using asymmetry measurements from the Ultracold Neutron Asymmetry (UCNA) experiment".  United States.  https://doi.org/10.1103/physrevc.101.035503.  https://www.osti.gov/servlets/purl/1820879.

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@article{osti_1820879,

  title        = {Improved limits on Fierz interference using asymmetry measurements from the Ultracold Neutron Asymmetry (UCNA) experiment},

  author       = {Sun, X. and Adamek, E. and Allgeier, B. and Bagdasarova, Y. and Berguno, D. B. and Blatnik, M. and Bowles, T. J. and Broussard, L. J. and Brown, M. A.-P. and Carr, R. and Clayton, S. and Cude-Woods, C. and Currie, S. and Dees, E. B. and Ding, X. and Filippone, B. W. and García, A. and Geltenbort, P. and Hasan, S. and Hickerson, K. P. and Hoagland, J. and Hong, R. and Holley, A. T. and Ito, T. M. and Knecht, A. and Liu, C. -Y. and Liu, J. and Makela, M. and Mammei, R. and Martin, J. W. and Melconian, D. and Mendenhall, M. P. and Moore, S. D. and Morris, C. L. and Nepal, S. and Nouri, N. and Pattie, R. W. and Pérez Gálvan, A. and Phillips, D. G. and Picker, R. and Pitt, M. L. and Plaster, B. and Salvat, D. J. and Saunders, A. and Sharapov, E. I. and Sjue, S. and Slutsky, S. and Sondheim, W. and Swank, C. and Tatar, E. and Vogelaar, R. B. and VornDick, B. and Wang, Z. and Wei, W. and Wexler, J. W. and Womack, T. and Wrede, C. and Young, A. R. and Zeck, B. A.},

  abstractNote = {The Ultracold Neutron Asymmetry (UCNA) experiment was designed to measure the β-decay asymmetry parameter, A0, for free neutron decay. In the experiment, polarized ultracold neutrons are transported into a decay trap, and their β-decay electrons are detected with ≈4π acceptance into two detector packages which provide position and energy reconstruction. The experiment also has sensitivity to bn, the Fierz interference term in the neutron β-decay rate. In this work, we determine bn from the energy dependence of A0 using the data taken during the UCNA 2011–2013 run. In addition, we present the same type of analysis using the earlier 2010 A dataset. Furthermore, motivated by improved statistics and comparable systematic errors compared to the 2010 data-taking run, we present a new bn measurement using the weighted average of our asymmetry dataset fits, to obtain bn = 0.066 ± 0.041stat ± 0.024syst which corresponds to a limit of -0.012 < bn < 0.144 at the 90% confidence level.},

  doi          = {10.1103/physrevc.101.035503},

  journal      = {Physical Review C},

  number       = 3,

  volume       = 101,

  place        = {United States},

  year         = {Mon Mar 16 00:00:00 EDT 2020},

  month        = {Mon Mar 16 00:00:00 EDT 2020}

}

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Title: Improved limits on Fierz interference using asymmetry measurements from the Ultracold Neutron Asymmetry (UCNA) experiment

Abstract

Citation Formats

Tests of the standard electroweak model in nuclear beta decay journal, September 2006

Erratum: Limits on tensor coupling from neutron β decay [Phys. Rev. C 88 , 048501 (2013)] journal, December 2015

Colloquium : The neutron lifetime journal, November 2011

Demonstration of a solid deuterium source of ultra-cold neutrons journal, July 2004

Measurement of the neutron β -asymmetry parameter A 0 with ultracold neutrons journal, November 2012

Publisher's Note: First direct constraints on Fierz interference in free-neutron β decay [Phys. Rev. C 96, 042501(R) (2017)] journal, November 2017

The Neutron Enigma journal, March 2016

Precision measurement of the neutron β -decay asymmetry journal, March 2013

A solenoidal electron spectrometer for a precision measurement of the neutron -asymmetry with ultracold neutrons journal, October 2008

Limits on tensor coupling from neutron β decay journal, October 2013

New precision measurements of free neutron beta decay with cold neutrons journal, October 2014

First Measurement of the Neutron β Asymmetry with Ultracold Neutrons journal, January 2009

A multiwire proportional chamber for precision studies of neutron decay angular correlations journal, February 2007

Beta decay measurements with ultracold neutrons: a review of recent measurements and the research program at Los Alamos National Laboratory journal, October 2014

Final results for the neutron β -asymmetry parameter A 0 from the UCNA experiment journal, January 2019

First direct constraints on Fierz interference in free-neutron β decay journal, October 2017

Prospects for precision measurements in nuclear β decay in the LHC era: Prospects for precision measurements in nuclear β decay in the LHC era journal, August 2013

Framework for maximum likelihood analysis of neutron β decay observables to resolve the limits of the V − A law journal, June 2013

Limits on tensor-type weak currents from nuclear and neutron β decays journal, February 2014

Measurements of Ultracold-Neutron Lifetimes in Solid Deuterium journal, December 2002

Performance of the Los Alamos National Laboratory spallation-driven solid-deuterium ultra-cold neutron source journal, January 2013

Symmetry Tests in Nuclear Beta Decay journal, November 2011

New result for the neutron β -asymmetry parameter A 0 from UCNA journal, March 2018

Probing novel scalar and tensor interactions from (ultra)cold neutrons to the LHC journal, March 2012

New physics searches in nuclear and neutron β decay journal, January 2019

Precision Measurement of the Radiative β Decay of the Free Neutron journal, June 2016

Low energy tests of the weak interaction journal, April 2005

Possible Tests of Time Reversal Invariance in Beta Decay journal, May 1957

Determination of the Axial-Vector Weak Coupling Constant with Ultracold Neutrons journal, October 2010

Tests of the standard electroweak model in nuclear beta decay
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Erratum: Limits on tensor coupling from neutron $β$ decay [Phys. Rev. C 88 , 048501 (2013)]
journal, December 2015

Colloquium : The neutron lifetime
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Demonstration of a solid deuterium source of ultra-cold neutrons
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Measurement of the neutron $β$ -asymmetry parameter $A_{0}$ with ultracold neutrons
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journal, November 2017

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journal, February 2007

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journal, October 2014

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journal, November 2011

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