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Title: Limit on Tensor Currents from Li 8 β Decay

In the standard model, the weak interaction is formulated with a purely vector-axial-vector ($$V\text{-}A$$) structure. Without restriction on the chirality of the neutrino, the most general limits on tensor currents from nuclear $${\beta}$$ decay are dominated by a single measurement of the $${\beta}\text{-}\overline{{\nu}}$$ correlation in $$^{6}\mathrm{He}$$ $${\beta}$$ decay dating back over a half century. In the present paper, the $${\beta}\text{-}\overline{{\nu}}\text{-}{\alpha}$$ correlation in the $${\beta}$$ decay of $$^{8}\mathrm{Li}$$ and subsequent $${\alpha}$$-particle breakup of the $${^{8}\mathrm{Be}}^{*}$$ daughter was measured. The results are consistent with a purely $$V\text{-}A$$ interaction and in the case of couplings to right-handed neutrinos ($${C}_{T}={-}{C}_{T}^{{'}}$$) limits the tensor fraction to $$|{C}_{T}/{C}_{A}{|}^{2}<0.011$$ (95.5% C.L.). Finally, the measurement confirms the $$^{6}\mathrm{He}$$ result using a different nuclear system and employing modern ion-trapping techniques subject to different systematic uncertainties.
Authors:
 [1] ;  [2] ;  [3] ;  [4] ;  [5] ;  [5] ;  [6] ;  [4] ;  [4] ;  [7] ;  [6] ;  [8] ;  [5] ;  [6] ;  [9] ;  [5] ;  [10] ;  [5] ;  [11] ;  [4] more »;  [12] ;  [5] « less
  1. Univ. of Chicago, IL (United States). Dept. of Physics; Argonne National Lab. (ANL), Argonne, IL (United States). Physics Division; Univ. of Washington, Seattle, WA (United States). Dept. of Physics
  2. Northwestern Univ., Evanston, IL (United States). Dept. of Physics and Astronomy
  3. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States). Physical and Life Sciences Directorate
  4. Univ. of Chicago, IL (United States). Dept. of Physics; Argonne National Lab. (ANL), Argonne, IL (United States). Physics Division
  5. Argonne National Lab. (ANL), Argonne, IL (United States). Physics Division
  6. McGill Univ., Montreal, QC (Canada). Dept. of Physics
  7. Argonne National Lab. (ANL), Argonne, IL (United States). Physics Division; Univ. of Manitoba, Winnipeg, MB (Canada). Dept. of Physics and Astronomy
  8. Louisiana State Univ., Baton Rouge, LA (United States). Dept. of Physics and Astronomy; Michigan State Univ., East Lansing, MI (United States). Joint Inst. for Nuclear Astrophysics
  9. Northwestern Univ., Evanston, IL (United States). Dept. of Physics and Astronomy; Argonne National Lab. (ANL), Argonne, IL (United States). Physics Division
  10. McGill Univ., Montreal, QC (Canada). Dept. of Physics; Argonne National Lab. (ANL), Argonne, IL (United States). Physics Division; Canadian Nuclear Laboratories, Chalk River, ON (Canada)
  11. Univ. of Manitoba, Winnipeg, MB (Canada). Dept. of Physics and Astronomy
  12. Univ. of California, Berkeley, CA (United States). Dept. of Nuclear Engineering; Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States). Physical and Life Sciences Directorate
Publication Date:
Report Number(s):
LLNL-JRNL-702436
Journal ID: ISSN 0031-9007; 836386
Grant/Contract Number:
AC52-07NA27344; AC02-06CH11357; 216974
Type:
Accepted Manuscript
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 115; Journal Issue: 18; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society (APS)
Research Org:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Argonne National Lab. (ANL), Argonne, IL (United States); McGill Univ., Montreal, QC (Canada)
Sponsoring Org:
USDOE Office of Science (SC); Natural Sciences and Engineering Research Council of Canada (NSERC)
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS
OSTI Identifier:
1461748
Alternate Identifier(s):
OSTI ID: 1224572

Sternberg, M. G., Segel, R., Scielzo, N. D., Savard, G., Clark, J. A., Bertone, P. F., Buchinger, F., Burkey, M., Caldwell, S., Chaudhuri, A., Crawford, J. E., Deibel, C. M., Greene, J., Gulick, S., Lascar, D., Levand, A. F., Li, G., Perez Galvan, A., Sharma, K. S., Van Schelt, J., Yee, R. M., and Zabransky, B. J.. Limit on Tensor Currents from Li8 β Decay. United States: N. p., Web. doi:10.1103/PhysRevLett.115.182501.
Sternberg, M. G., Segel, R., Scielzo, N. D., Savard, G., Clark, J. A., Bertone, P. F., Buchinger, F., Burkey, M., Caldwell, S., Chaudhuri, A., Crawford, J. E., Deibel, C. M., Greene, J., Gulick, S., Lascar, D., Levand, A. F., Li, G., Perez Galvan, A., Sharma, K. S., Van Schelt, J., Yee, R. M., & Zabransky, B. J.. Limit on Tensor Currents from Li8 β Decay. United States. doi:10.1103/PhysRevLett.115.182501.
Sternberg, M. G., Segel, R., Scielzo, N. D., Savard, G., Clark, J. A., Bertone, P. F., Buchinger, F., Burkey, M., Caldwell, S., Chaudhuri, A., Crawford, J. E., Deibel, C. M., Greene, J., Gulick, S., Lascar, D., Levand, A. F., Li, G., Perez Galvan, A., Sharma, K. S., Van Schelt, J., Yee, R. M., and Zabransky, B. J.. 2015. "Limit on Tensor Currents from Li8 β Decay". United States. doi:10.1103/PhysRevLett.115.182501. https://www.osti.gov/servlets/purl/1461748.
@article{osti_1461748,
title = {Limit on Tensor Currents from Li8 β Decay},
author = {Sternberg, M. G. and Segel, R. and Scielzo, N. D. and Savard, G. and Clark, J. A. and Bertone, P. F. and Buchinger, F. and Burkey, M. and Caldwell, S. and Chaudhuri, A. and Crawford, J. E. and Deibel, C. M. and Greene, J. and Gulick, S. and Lascar, D. and Levand, A. F. and Li, G. and Perez Galvan, A. and Sharma, K. S. and Van Schelt, J. and Yee, R. M. and Zabransky, B. J.},
abstractNote = {In the standard model, the weak interaction is formulated with a purely vector-axial-vector ($V\text{-}A$) structure. Without restriction on the chirality of the neutrino, the most general limits on tensor currents from nuclear ${\beta}$ decay are dominated by a single measurement of the ${\beta}\text{-}\overline{{\nu}}$ correlation in $^{6}\mathrm{He}$ ${\beta}$ decay dating back over a half century. In the present paper, the ${\beta}\text{-}\overline{{\nu}}\text{-}{\alpha}$ correlation in the ${\beta}$ decay of $^{8}\mathrm{Li}$ and subsequent ${\alpha}$-particle breakup of the ${^{8}\mathrm{Be}}^{*}$ daughter was measured. The results are consistent with a purely $V\text{-}A$ interaction and in the case of couplings to right-handed neutrinos (${C}_{T}={-}{C}_{T}^{{'}}$) limits the tensor fraction to $|{C}_{T}/{C}_{A}{|}^{2}<0.011$ (95.5% C.L.). Finally, the measurement confirms the $^{6}\mathrm{He}$ result using a different nuclear system and employing modern ion-trapping techniques subject to different systematic uncertainties.},
doi = {10.1103/PhysRevLett.115.182501},
journal = {Physical Review Letters},
number = 18,
volume = 115,
place = {United States},
year = {2015},
month = {10}
}