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Title: Using Nab to determine correlations in unpolarized neutron decay

Abstract

The Nab experiment will measure the ratio of the weak axial-vector and vector coupling constants λ = gA/gV with precision δλ/λ ~3 × 10 -4 and search for a Fierz term b F at a level Δb F < 10 -3. The Nab detection system uses thick, large area, segmented silicon detectors to very precisely determine the decay proton’s time of flight and the decay electron’s energy in coincidence and reconstruct the correlation between the antineutrino and electron momenta. Excellent understanding of systematic effects affecting timing and energy reconstruction using this detection system are required. Here, to explore these effects, a series of ex situ studies have been undertaken, including a search for a Fierz term at a less sensitive level of Δb F < 10 -2 in the beta decay of 45Ca using the UCNA spectrometer.

Authors:
ORCiD logo; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; more »; ; ; ; ; ; ; ; ; ; ; « less
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.:
Nab Collaboration
OSTI Identifier:
1488716
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Accepted Manuscript
Journal Name:
Hyperfine Interactions
Additional Journal Information:
Journal Volume: 240; Journal Issue: 1; Journal ID: ISSN 0304-3843
Publisher:
Springer
Country of Publication:
United States
Language:
English
Subject:
Neutron beta decay; Nuclear beta decay; Beta spectrum; Silicon detector

Citation Formats

Broussard, L. J., Baeßler, S., Bailey, T. L., Birge, N., Bowman, J. D., Crawford, C. B., Cude-Woods, C., Fellers, D. E., Fomin, N., Frlež, E., Gericke, M. T. W., Hayen, L., Jezghani, A. P., Li, H., Macsai, N., Makela, M. F., Mammei, R. R., Mathews, D., McGaughey, P. L., Mueller, P. E., Počanić, D., Royse, C. A., Salas-Bacci, A., Sjue, S. K. L., Ramsey, J. C., Severijns, N., Smith, E. C., Wexler, J., Whitehead, R. A., Young, A. R., and Zeck, B. A. Using Nab to determine correlations in unpolarized neutron decay. United States: N. p., 2018. Web. doi:10.1007/s10751-018-1538-7.
Broussard, L. J., Baeßler, S., Bailey, T. L., Birge, N., Bowman, J. D., Crawford, C. B., Cude-Woods, C., Fellers, D. E., Fomin, N., Frlež, E., Gericke, M. T. W., Hayen, L., Jezghani, A. P., Li, H., Macsai, N., Makela, M. F., Mammei, R. R., Mathews, D., McGaughey, P. L., Mueller, P. E., Počanić, D., Royse, C. A., Salas-Bacci, A., Sjue, S. K. L., Ramsey, J. C., Severijns, N., Smith, E. C., Wexler, J., Whitehead, R. A., Young, A. R., & Zeck, B. A. Using Nab to determine correlations in unpolarized neutron decay. United States. doi:10.1007/s10751-018-1538-7.
Broussard, L. J., Baeßler, S., Bailey, T. L., Birge, N., Bowman, J. D., Crawford, C. B., Cude-Woods, C., Fellers, D. E., Fomin, N., Frlež, E., Gericke, M. T. W., Hayen, L., Jezghani, A. P., Li, H., Macsai, N., Makela, M. F., Mammei, R. R., Mathews, D., McGaughey, P. L., Mueller, P. E., Počanić, D., Royse, C. A., Salas-Bacci, A., Sjue, S. K. L., Ramsey, J. C., Severijns, N., Smith, E. C., Wexler, J., Whitehead, R. A., Young, A. R., and Zeck, B. A. Mon . "Using Nab to determine correlations in unpolarized neutron decay". United States. doi:10.1007/s10751-018-1538-7. https://www.osti.gov/servlets/purl/1488716.
@article{osti_1488716,
title = {Using Nab to determine correlations in unpolarized neutron decay},
author = {Broussard, L. J. and Baeßler, S. and Bailey, T. L. and Birge, N. and Bowman, J. D. and Crawford, C. B. and Cude-Woods, C. and Fellers, D. E. and Fomin, N. and Frlež, E. and Gericke, M. T. W. and Hayen, L. and Jezghani, A. P. and Li, H. and Macsai, N. and Makela, M. F. and Mammei, R. R. and Mathews, D. and McGaughey, P. L. and Mueller, P. E. and Počanić, D. and Royse, C. A. and Salas-Bacci, A. and Sjue, S. K. L. and Ramsey, J. C. and Severijns, N. and Smith, E. C. and Wexler, J. and Whitehead, R. A. and Young, A. R. and Zeck, B. A.},
abstractNote = {The Nab experiment will measure the ratio of the weak axial-vector and vector coupling constants λ = gA/gV with precision δλ/λ ~3 × 10-4 and search for a Fierz term bF at a level ΔbF < 10-3. The Nab detection system uses thick, large area, segmented silicon detectors to very precisely determine the decay proton’s time of flight and the decay electron’s energy in coincidence and reconstruct the correlation between the antineutrino and electron momenta. Excellent understanding of systematic effects affecting timing and energy reconstruction using this detection system are required. Here, to explore these effects, a series of ex situ studies have been undertaken, including a search for a Fierz term at a less sensitive level of ΔbF < 10-2 in the beta decay of 45Ca using the UCNA spectrometer.},
doi = {10.1007/s10751-018-1538-7},
journal = {Hyperfine Interactions},
number = 1,
volume = 240,
place = {United States},
year = {2018},
month = {12}
}

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