Tritium decay and proton-proton fusion in pionless effective field theory
Journal Article
·
· Physical Review. C
The Gamow-Teller and Fermi matrix elements, and , respectively, for tritium decay are calculated to next-to-leading order (NLO) in pionless effective field theory in the absence of Coulomb interactions and isospin violation giving the leading order predictions and . Using an experimentally determined value for the tritium decay GT matrix element, the two-body axial current low energy constant is fixed at NLO yielding at the renormalization scale of the physical pion mass, which agrees with predictions based on naive dimensional analysis. The impact of on proton-proton fusion is also discussed. Finally, the consequences of Wigner-SU(4) spin-isospin symmetry are considered for the Gamow-Teller matrix element.
Published by the American Physical Society 2024- Research Organization:
- Duke Univ., Durham, NC (United States); Ohio Univ., Athens, OH (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC); USDOE Office of Science (SC), Nuclear Physics (NP)
- Grant/Contract Number:
- FG02-05ER41368; FG02-93ER40756
- OSTI ID:
- 2438110
- Alternate ID(s):
- OSTI ID: 2579243
- Journal Information:
- Physical Review. C, Journal Name: Physical Review. C Journal Issue: 2 Vol. 110; ISSN PRVCAN; ISSN 2469-9985
- Publisher:
- American Physical SocietyCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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