Tritium β decay in pionless effective field theory

Hilla De-Leon*, Lucas Platter, Doron Gazit

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

13 Scopus citations


We calculate the β decay of tritium at next-to-leading order in pionless effective field theory. At this order, a low-energy parameter l1,A enters the calculation that is also relevant for a high-accuracy prediction of the solar proton-proton fusion rate. We use the tritium half-life to determine this parameter and provide uncertainty estimates. We show proper renormalization of our calculation analyzing the residual cutoff dependence of observables. We find that next-to-leading-order corrections contribute about 4% to the triton decay Gamow-Teller strength. We show that these conclusions are insensitive to different arrangements of the effective range expansion.

Original languageAmerican English
Article number055502
JournalPhysical Review C
Issue number5
StatePublished - 13 Nov 2019

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© 2019 American Physical Society.


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