Superallowed Fermi transitions in RPA with a relativistic point-coupling energy functional

Zhaoxi Li, Jiangming Yao, Hong Chen

Research output: Contribution to journalReview articlepeer-review

2 Citations (Scopus)


The self-consistent random phase approximation (RPA) approach with the residual interaction derived from a relativistic point-coupling energy functional is applied to evaluate the isospin symmetry-breaking corrections δ c for the 0+ → 0+ superallowed Fermi transitions. With these δ c values, together with the available experimental f t values and the improved radiative corrections, the unitarity of the Cabibbo-Kobayashi-Maskawa (CKM) matrix is examined. Even with the consideration of uncertainty, the sum of squared top-row elements has been shown to deviate from the unitarity condition by 0.1% for all the employed relativistic energy functionals.

Original languageEnglish
Pages (from-to)1131-1136
Number of pages6
JournalScience China: Physics, Mechanics and Astronomy
Issue number6
Publication statusPublished - 2011 Jun
Externally publishedYes


  • Cabibbo-Kobayashi-Maskawa matrix
  • random phase approximation
  • relativistic point-coupling energy functional
  • superallowed Fermi transition

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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