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Local chiral interactions, the tritium Gamow-Teller matrix element, and the three-nucleon contact term

Journal Article · · Physical Review C
 [1];  [2];  [3];  [4];  [5];  [6];  [7];  [8];  [9];  [5];  [9]
  1. Univ. of South Carolina, Columbia, SC (United States)
  2. Old Dominion Univ., Norfolk, VA (United States); Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
  3. Univ. of Pisa, Pisa (Italy); INFN-Pisa, Pisa (Italy)
  4. Univ. of Salento, Lecce (Italy); INFN-Lecce, Lecce (Italy)
  5. INFN-Pisa, Pisa (Italy)
  6. Argonne National Lab. (ANL), Argonne, IL (United States); Trento Institute for Fundamental Physics and Applications, Trento (Italy)
  7. Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Washington Univ., St. Louis, MO (United States)
  8. Argonne National Lab. (ANL), Argonne, IL (United States); Washington Univ., St. Louis, MO (United States)
  9. Argonne National Lab. (ANL), Argonne, IL (United States)

The Gamow-Teller (GT) matrix element contributing to tritium β decay is calculated with trinucleon wave functions obtained from hyperspherical-harmonics solutions of the Schrödinger equation with the chiral two- and three-nucleon interactions including Δ intermediate states that have recently been constructed in configuration space. Predictions up to next-to-next-to-next-to-leading order (N3LO) in the chiral expansion of the axial current (with Δ's) overestimate the empirical value by 1–4%. By exploiting the relation between the low-energy constant (LEC) in the contact three-nucleon interaction and two-body axial current, we provide new determinations of the LECs cD and cE that characterize this interaction by fitting the trinucleon binding energy and tritium GT matrix element. Some of the implications that the resulting models of three-nucleon interactions have on the spectra of light nuclei and the equation of state of neutron matter are briefly discussed. We also provide a partial analysis, which ignores Δ's, of the contributions due to loop corrections in the axial current at next-to-next-to-next-to-next-to-leading order (N4LO). Lastly, explicit expressions for the axial current up to N4LO have been derived in configuration space, which other researchers in the field may find useful.

Research Organization:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
1480311
Alternate ID(s):
OSTI ID: 1478603
OSTI ID: 1480456
Journal Information:
Physical Review C, Journal Name: Physical Review C Journal Issue: 4 Vol. 98; ISSN PRVCAN; ISSN 2469-9985
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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Cited By (4)

Muon capture in nuclei: An ab initio approach based on Green's function Monte Carlo methods journal September 2019
Renormalized approach to neutrinoless double- β decay journal November 2019
Local Nucleon-Nucleon and Three-Nucleon Interactions Within Chiral Effective Field Theory journal January 2020
Local nucleon-nucleon and three-nucleon interactions within chiral effective field theory text January 2020

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Journal Article · Thu Aug 18 00:00:00 EDT 2016 · Physical Review C · OSTI ID:1302044