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Title: Chiral effective field theory calculations of weak transitions in light nuclei

Abstract

In this work, we report quantum Monte Carlo calculations of weak transitions in A≤10 nuclei, based on the Norfolk two- and three-nucleon chiral interactions, and associated one- and two-body axial currents. Furthermore, we find that the contribution from two-body currents is at the 2–3% level, with the exception of matrix elements entering the rates of 8Li, 8B, and 8He β decay. These matrix elements are suppressed in impulse approximation based on the (leading order) Gamow Teller transition operator alone; two-body currents provide a 20–30% correction, which is, however, insufficient to bring theory in agreement with experimental data. For the other transitions, the agreement with the data is satisfactory, and the results exhibit a negligible to mild model dependence when different combinations of Norfolk interactions are utilized to construct the nuclear wave functions. We report a complete study of two-body weak transition densities which reveals the expected universal behavior of two-body currents at short distances throughout the range of A=3 to A=10 systems considered here.

Authors:
ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [2];  [1]; ORCiD logo [3];  [4];  [5]; ORCiD logo [5]
  1. Washington Univ., St. Louis, MO (United States)
  2. Washington Univ., St. Louis, MO (United States); Washington Univ., St. Louis, MO (United States). McDonnell Center for the Space Sciences
  3. Old Dominion Univ., Norfolk, VA (United States); Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States). Theory Center
  4. Argonne National Lab. (ANL), Argonne, IL (United States)
  5. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Publication Date:
Research Org.:
Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States); Argonne National Laboratory (ANL), Argonne, IL (United States); Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Nuclear Physics (NP); USDOE Office of Science (SC). Nuclear Physics (NP)
OSTI Identifier:
1649984
Alternate Identifier(s):
OSTI ID: 1657247; OSTI ID: 1688766
Report Number(s):
JLAB-THY-20-3175; DOE/OR-23177-4955; arXiv:2004.05263; LA-UR-20-22861
Journal ID: ISSN 2469-9985; TRN: US2202719
Grant/Contract Number:  
SC0013617; AC52-06NA25396; AC02-06CH11357; AC05-06OR23177; 89233218CNA000001
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review. C
Additional Journal Information:
Journal Volume: 102; Journal Issue: 2; 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; Chiral perturbation theory; Electroweak interactions in nuclear physics; Few-body systems; Nuclear structure & decays; Atomic, Nuclear and Particle Physics

Citation Formats

King, G. B., Andreoli, L., Pastore, S., Piarulli, M., Schiavilla, R., Wiringa, R. B., Carlson, J., and Gandolfi, S. Chiral effective field theory calculations of weak transitions in light nuclei. United States: N. p., 2020. Web. doi:10.1103/physrevc.102.025501.
King, G. B., Andreoli, L., Pastore, S., Piarulli, M., Schiavilla, R., Wiringa, R. B., Carlson, J., & Gandolfi, S. Chiral effective field theory calculations of weak transitions in light nuclei. United States. https://doi.org/10.1103/physrevc.102.025501
King, G. B., Andreoli, L., Pastore, S., Piarulli, M., Schiavilla, R., Wiringa, R. B., Carlson, J., and Gandolfi, S. Thu . "Chiral effective field theory calculations of weak transitions in light nuclei". United States. https://doi.org/10.1103/physrevc.102.025501. https://www.osti.gov/servlets/purl/1649984.
@article{osti_1649984,
title = {Chiral effective field theory calculations of weak transitions in light nuclei},
author = {King, G. B. and Andreoli, L. and Pastore, S. and Piarulli, M. and Schiavilla, R. and Wiringa, R. B. and Carlson, J. and Gandolfi, S.},
abstractNote = {In this work, we report quantum Monte Carlo calculations of weak transitions in A≤10 nuclei, based on the Norfolk two- and three-nucleon chiral interactions, and associated one- and two-body axial currents. Furthermore, we find that the contribution from two-body currents is at the 2–3% level, with the exception of matrix elements entering the rates of 8Li, 8B, and 8He β decay. These matrix elements are suppressed in impulse approximation based on the (leading order) Gamow Teller transition operator alone; two-body currents provide a 20–30% correction, which is, however, insufficient to bring theory in agreement with experimental data. For the other transitions, the agreement with the data is satisfactory, and the results exhibit a negligible to mild model dependence when different combinations of Norfolk interactions are utilized to construct the nuclear wave functions. We report a complete study of two-body weak transition densities which reveals the expected universal behavior of two-body currents at short distances throughout the range of A=3 to A=10 systems considered here.},
doi = {10.1103/physrevc.102.025501},
journal = {Physical Review. C},
number = 2,
volume = 102,
place = {United States},
year = {Thu Aug 20 00:00:00 EDT 2020},
month = {Thu Aug 20 00:00:00 EDT 2020}
}

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