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

Li, ZhaoXi; Yao, J. M.; Chen, Hong

doi:10.1007/s11433-011-4320-2

Cited by 3 publications

(2 citation statements)

References 29 publications

(48 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Liang et al [202] have given results for nine different interactions, out of which we have selected two, labelled PKO1 and DD-ME2, to display in columns 4 and 5 of Table XI. Yet another variant on this technique from Li, Yao and Chen [203] replaced the finite-range meson-exchange residual interaction with a relativistic point-coupling energy functional in an otherwise identical calculation. One of their results, labelled PC-F1, is given in column 6 of Table XI. IVMR.…”

Section: Isospin-symmetry Breakingmentioning

confidence: 99%

Superallowed0+→0+nuclearβdecays: 2014 critical survey, with precise results forVud

2015

View full text Add to dashboard Cite

Superallowed 0 + → 0 + nuclear β decays: 2014 critical survey, with precise results for V ud and CKM Unitarity A new critical survey is presented of all half-life, decay-energy and branching-ratio measurements related to 20 superallowed 0 + → 0 + β decays. Included are 222 individual measurements of comparable precision obtained from 177 published references. Compared with our last review in 2008, we have added results from 24 new publications and eliminated 9 references, the results from which having been superceded by much more precise modern data. We obtain world-average f t-values for each of the eighteen transitions that have a complete set of data, then apply radiative and isospinsymmetry-breaking corrections to extract "corrected" Ft values. Fourteen of these Ft values now have a precision of order 0.1% or better. In the process of obtaining these results we carefully evaluate the available calculations of the isospin-symmetry-breaking corrections by testing the extent to which they lead to Ft values consistent with conservation of the vector current (CVC). Only one set of calculations satisfactorily meets this condition. The resultant average Ft value, when combined with the muon liftime, yields the up-down quark-mixing element of the Cabibbo-Kobayashi-Maskawa (CKM) matrix, V ud = 0.97417 ± 0.00021. The unitarity test on the top row of the matrix becomes |V ud | 2 + |Vus| 2 + |V ub | 2 = 0.99978 ± 0.00055 if the Particle Data Group recommended value for Vus is used. However, recent lattice QCD calculations, not included yet in the PDG evaluation, have introduced some inconsistency into kaon-decay measurements of Vus and Vus/V ud . We examine the impact of these new results on the unitarity test and conclude that there is no evidence of any statistically significant violation of unitarity. Finally, from the Ft-value data we also set limits on the possible existence of scalar interactions.

show abstract

Section: Isospin-symmetry Breakingmentioning

confidence: 99%

Superallowed0+→0+nuclearβdecays: 2014 critical survey, with precise results forVud

2015

View full text Add to dashboard Cite

show abstract

Section: Isospin-symmetry Breakingmentioning

confidence: 99%

Superallowed 0+ --> 0+ nuclear beta decays: 2014 critical survey, with precise results for Vud and CKM unitarity

Hardy,

Towner

2014

Preprint

View full text Add to dashboard Cite

A new critical survey is presented of all half-life, decay-energy and branching-ratio measurements related to 20 superallowed 0 + → 0 + β decays. Included are 222 individual measurements of comparable precision obtained from 177 published references. Compared with our last review in 2008, we have added results from 24 new publications and eliminated 9 references, the results from which having been superceded by much more precise modern data. We obtain world-average f t-values for each of the eighteen transitions that have a complete set of data, then apply radiative and isospinsymmetry-breaking corrections to extract "corrected" Ft values. Fourteen of these Ft values now have a precision of order 0.1% or better. In the process of obtaining these results we carefully evaluate the available calculations of the isospin-symmetry-breaking corrections by testing the extent to which they lead to Ft values consistent with conservation of the vector current (CVC). Only one set of calculations satisfactorily meets this condition. The resultant average Ft value, when combined with the muon liftime, yields the up-down quark-mixing element of the Cabibbo-Kobayashi-Maskawa (CKM) matrix, V ud = 0.97417 ± 0.00021. The unitarity test on the top row of the matrix becomes0.99978 ± 0.00055 if the Particle Data Group recommended value for Vus is used. However, recent lattice QCD calculations, not included yet in the PDG evaluation, have introduced some inconsistency into kaon-decay measurements of Vus and Vus/V ud . We examine the impact of these new results on the unitarity test and conclude that there is no evidence of any statistically significant violation of unitarity. Finally, from the Ft-value data we also set limits on the possible existence of scalar interactions.

show abstract

Comparative study of nuclear masses in the relativistic mean-field model

Hua

Heng

Niu

et al. 2012

Sci. China Phys. Mech. Astron.

View full text Add to dashboard Cite

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

Cited by 3 publications

References 29 publications

Superallowed0+→0+nuclearβdecays: 2014 critical survey, with precise results forVud

Superallowed0+→0+nuclearβdecays: 2014 critical survey, with precise results forVud

Superallowed 0+ --> 0+ nuclear beta decays: 2014 critical survey, with precise results for Vud and CKM unitarity

Comparative study of nuclear masses in the relativistic mean-field model

Contact Info

Product

Resources

About