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Longfellow B, Gallant AT, Sargsyan GH, Burkey MT, Hirsh TY, Savard G, Scielzo ND, Varriano L, Brodeur M, Burdette DP, Clark JA, Lascar D, Launey KD, Mueller P, Ray D, Sharma KS, Valverde AA, Wilson GL, Yan XL. Improved Tensor Current Limit from ^{8}B β Decay Including New Recoil-Order Calculations. PHYSICAL REVIEW LETTERS 2024; 132:142502. [PMID: 38640383 DOI: 10.1103/physrevlett.132.142502] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/29/2023] [Revised: 01/11/2024] [Accepted: 03/11/2024] [Indexed: 04/21/2024]
Abstract
A precision measurement of the β^{+} decay of ^{8}B was performed using the Beta-decay Paul Trap to determine the β-ν angular correlation coefficient a_{βν}. The experimental results were combined with new ab initio symmetry-adapted no-core shell-model calculations to yield the second-most precise measurement from Gamow-Teller decays, a_{βν}=-0.3345±0.0019_{stat}±0.0021_{syst}. This value agrees with the standard model value of -1/3 and improves uncertainties in ^{8}B by nearly a factor of 2. By combining results from ^{8}B and ^{8}Li, a tight limit on tensor current coupling to right-handed neutrinos was obtained. A recent global evaluation of all other precision β decay studies suggested a nonzero value for right-handed neutrino coupling in contradiction with the standard model at just above 3σ. The present results are of comparable sensitivity and do not support this finding.
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Affiliation(s)
- B Longfellow
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - A T Gallant
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - G H Sargsyan
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - M T Burkey
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - T Y Hirsh
- Soreq Nuclear Research Center, Yavne 81800, Israel
| | - G Savard
- Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA
- Department of Physics, University of Chicago, Chicago, Illinois 60637, USA
| | - N D Scielzo
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - L Varriano
- Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA
- Department of Physics, University of Chicago, Chicago, Illinois 60637, USA
| | - M Brodeur
- Department of Physics and Astronomy, University of Notre Dame, Notre Dame, Indiana 46556, USA
| | - D P Burdette
- Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA
- Department of Physics and Astronomy, University of Notre Dame, Notre Dame, Indiana 46556, USA
| | - J A Clark
- Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - D Lascar
- Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA
- Department of Physics and Astronomy, Northwestern University, Evanston, Illinois 60208, USA
| | - K D Launey
- Department of Physics and Astronomy, Louisiana State University, Baton Rouge, Louisiana 70803, USA
| | - P Mueller
- Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - D Ray
- Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA
- Department of Physics and Astronomy, University of Manitoba, Winnipeg, Manitoba R3T 2N2, Canada
| | - K S Sharma
- Department of Physics and Astronomy, University of Manitoba, Winnipeg, Manitoba R3T 2N2, Canada
| | - A A Valverde
- Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA
- Department of Physics and Astronomy, University of Manitoba, Winnipeg, Manitoba R3T 2N2, Canada
| | - G L Wilson
- Department of Physics and Astronomy, Louisiana State University, Baton Rouge, Louisiana 70803, USA
| | - X L Yan
- Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA
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Sargsyan GH, Launey KD, Burkey MT, Gallant AT, Scielzo ND, Savard G, Mercenne A, Dytrych T, Langr D, Varriano L, Longfellow B, Hirsh TY, Draayer JP. Impact of Clustering on the ^{8}Li β Decay and Recoil Form Factors. PHYSICAL REVIEW LETTERS 2022; 128:202503. [PMID: 35657888 DOI: 10.1103/physrevlett.128.202503] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/15/2021] [Accepted: 04/04/2022] [Indexed: 06/15/2023]
Abstract
We place unprecedented constraints on recoil corrections in the β decay of ^{8}Li, by identifying a strong correlation between them and the ^{8}Li ground state quadrupole moment in large-scale ab initio calculations. The results are essential for improving the sensitivity of high-precision experiments that probe the weak interaction theory and test physics beyond the standard model. In addition, our calculations predict a 2^{+} state of the α+α system that is energetically accessible to β decay but has not been observed in the experimental ^{8}Be energy spectrum, and has an important effect on the recoil corrections and β decay for the A=8 systems. This state and an associated 0^{+} state are notoriously difficult to model due to their cluster structure and collective correlations, but become feasible for calculations in the ab initio symmetry-adapted no-core shell-model framework.
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Affiliation(s)
- G H Sargsyan
- Department of Physics and Astronomy, Louisiana State University, Baton Rouge, Louisiana 70803, USA
| | - K D Launey
- Department of Physics and Astronomy, Louisiana State University, Baton Rouge, Louisiana 70803, USA
| | - M T Burkey
- Department of Physics, University of Chicago, Chicago, Illinois 60637, USA
- Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - A T Gallant
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - N D Scielzo
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - G Savard
- Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - A Mercenne
- Department of Physics and Astronomy, Louisiana State University, Baton Rouge, Louisiana 70803, USA
- Center for Theoretical Physics, Sloane Physics Laboratory, Yale University, New Haven, Connecticut 06520, USA
| | - T Dytrych
- Department of Physics and Astronomy, Louisiana State University, Baton Rouge, Louisiana 70803, USA
- Nuclear Physics Institute of the Czech Academy of Sciences, 250 68 Řež, Czech Republic
| | - D Langr
- Department of Computer Systems, Faculty of Information Technology, Czech Technical University in Prague, Prague 16000, Czech Republic
| | - L Varriano
- Department of Physics, University of Chicago, Chicago, Illinois 60637, USA
- Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - B Longfellow
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - T Y Hirsh
- Soreq Nuclear Research Center, Yavne 81800, Israel
| | - J P Draayer
- Department of Physics and Astronomy, Louisiana State University, Baton Rouge, Louisiana 70803, USA
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Burkey MT, Savard G, Gallant AT, Scielzo ND, Clark JA, Hirsh TY, Varriano L, Sargsyan GH, Launey KD, Brodeur M, Burdette DP, Heckmaier E, Joerres K, Klimes JW, Kolos K, Laminack A, Leach KG, Levand AF, Longfellow B, Maaß B, Marley ST, Morgan GE, Mueller P, Orford R, Padgett SW, Pérez Galván A, Pierce JR, Ray D, Segel R, Siegl K, Sharma KS, Wang BS. Improved Limit on Tensor Currents in the Weak Interaction from ^{8}Li β Decay. PHYSICAL REVIEW LETTERS 2022; 128:202502. [PMID: 35657880 DOI: 10.1103/physrevlett.128.202502] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/15/2021] [Revised: 11/01/2021] [Accepted: 12/22/2021] [Indexed: 06/15/2023]
Abstract
The electroweak interaction in the standard model is described by a pure vector-axial-vector structure, though any Lorentz-invariant component could contribute. In this Letter, we present the most precise measurement of tensor currents in the low-energy regime by examining the β-ν[over ¯] correlation of trapped ^{8}Li ions with the Beta-decay Paul Trap. We find a_{βν}=-0.3325±0.0013_{stat}±0.0019_{syst} at 1σ for the case of coupling to right-handed neutrinos (C_{T}=-C_{T}^{'}), which is consistent with the standard model prediction.
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Affiliation(s)
- M T Burkey
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
- Department of Physics, University of Chicago, Chicago, Illinois 60637, USA
- Physics Division, Argonne National Laboratory, Lemont, Illinois 60439, USA
| | - G Savard
- Department of Physics, University of Chicago, Chicago, Illinois 60637, USA
- Physics Division, Argonne National Laboratory, Lemont, Illinois 60439, USA
| | - A T Gallant
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - N D Scielzo
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - J A Clark
- Physics Division, Argonne National Laboratory, Lemont, Illinois 60439, USA
- Department of Physics and Astronomy, University of Manitoba, Winnipeg, Manitoba R3T 2N2, Canada
| | - T Y Hirsh
- Physics Division, Argonne National Laboratory, Lemont, Illinois 60439, USA
- Department of Physics and Astronomy, University of Manitoba, Winnipeg, Manitoba R3T 2N2, Canada
- Soreq Nuclear Research Center, Yavne 81800, Israel
| | - L Varriano
- Department of Physics, University of Chicago, Chicago, Illinois 60637, USA
- Physics Division, Argonne National Laboratory, Lemont, Illinois 60439, USA
| | - G H Sargsyan
- Department of Physics and Astronomy, Louisiana State University, Baton Rouge, Louisiana 70803, USA
| | - K D Launey
- Department of Physics and Astronomy, Louisiana State University, Baton Rouge, Louisiana 70803, USA
| | - M Brodeur
- Department of Physics, University of Notre Dame, Notre Dame, Indiana 46556, USA
| | - D P Burdette
- Physics Division, Argonne National Laboratory, Lemont, Illinois 60439, USA
- Department of Physics, University of Notre Dame, Notre Dame, Indiana 46556, USA
| | - E Heckmaier
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
- Department of Physics and Astronomy, University of California Irvine, Irvine, California 92697, USA
| | - K Joerres
- Department of Physics and Astronomy, Louisiana State University, Baton Rouge, Louisiana 70803, USA
| | - J W Klimes
- Physics Division, Argonne National Laboratory, Lemont, Illinois 60439, USA
| | - K Kolos
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - A Laminack
- Department of Physics and Astronomy, Louisiana State University, Baton Rouge, Louisiana 70803, USA
| | - K G Leach
- Department of Physics, Colorado School of Mines, Golden, Colorado, 80401 USA
| | - A F Levand
- Physics Division, Argonne National Laboratory, Lemont, Illinois 60439, USA
| | - B Longfellow
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - B Maaß
- Physics Division, Argonne National Laboratory, Lemont, Illinois 60439, USA
- Institut für Kernphysik, Technische Universität Darmstadt, 64289 Darmstadt, Germany
| | - S T Marley
- Department of Physics and Astronomy, Louisiana State University, Baton Rouge, Louisiana 70803, USA
| | - G E Morgan
- Department of Physics and Astronomy, Louisiana State University, Baton Rouge, Louisiana 70803, USA
| | - P Mueller
- Physics Division, Argonne National Laboratory, Lemont, Illinois 60439, USA
| | - R Orford
- Physics Division, Argonne National Laboratory, Lemont, Illinois 60439, USA
- Department of Physics, McGill University, Montréal, Québec H3A 2T8, Canada
| | - S W Padgett
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - A Pérez Galván
- Physics Division, Argonne National Laboratory, Lemont, Illinois 60439, USA
| | - J R Pierce
- Department of Physics, University of Chicago, Chicago, Illinois 60637, USA
- Physics Division, Argonne National Laboratory, Lemont, Illinois 60439, USA
| | - D Ray
- Physics Division, Argonne National Laboratory, Lemont, Illinois 60439, USA
- Department of Physics and Astronomy, University of Manitoba, Winnipeg, Manitoba R3T 2N2, Canada
| | - R Segel
- Department of Physics and Astronomy, Northwestern University, Evanston, Illinois 60208, USA
| | - K Siegl
- Department of Physics, University of Notre Dame, Notre Dame, Indiana 46556, USA
| | - K S Sharma
- Department of Physics and Astronomy, University of Manitoba, Winnipeg, Manitoba R3T 2N2, Canada
| | - B S Wang
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
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McCoy AE, Caprio MA, Dytrych T, Fasano PJ. Emergent Sp(3,R) Dynamical Symmetry in the Nuclear Many-Body System from an Ab Initio Description. PHYSICAL REVIEW LETTERS 2020; 125:102505. [PMID: 32955308 DOI: 10.1103/physrevlett.125.102505] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/05/2019] [Accepted: 08/10/2020] [Indexed: 06/11/2023]
Abstract
Ab initio nuclear theory provides not only a microscopic framework for quantitative description of the nuclear many-body system, but also a foundation for deeper understanding of emergent collective correlations. A symplectic Sp(3,R)⊃U(3) dynamical symmetry is identified in ab initio predictions, from a no-core configuration interaction approach, and found to provide a qualitative understanding of the spectrum of ^{7}Be. Low-lying states form an Elliott SU(3) spectrum, while an Sp(3,R) excitation gives rise to an excited rotational band with strong quadrupole connections to the ground state band.
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Affiliation(s)
- Anna E McCoy
- TRIUMF, Vancouver, British Columbia V6T 2A3, Canada
- Department of Physics, University of Notre Dame, Notre Dame, Indiana 46556, USA
| | - Mark A Caprio
- Department of Physics, University of Notre Dame, Notre Dame, Indiana 46556, USA
| | - Tomáš Dytrych
- Nuclear Physics Institute, Academy of Sciences of the Czech Republic, 250 68 Řež, Czech Republic
- Department of Physics and Astronomy, Louisiana State University, Baton Rouge, Louisiana 70803, USA
| | - Patrick J Fasano
- Department of Physics, University of Notre Dame, Notre Dame, Indiana 46556, USA
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