Radiative Corrections to Semileptonic Beta Decays: Progress and Challenges

被引：14

作者：

Seng, Chien-Yeah ^{[1
,2
]}

机构：

[1] Univ Bonn, Helmholtz Inst Strahlen & Kernphys, D-53115 Bonn, Germany

[2] Univ Bonn, Bethe Ctr Theoret Phys, D-53115 Bonn, Germany

来源：

PARTICLES | 2021年 / 4卷 / 04期

关键词：

beta decay; CKM matrix; radiative corrections; current algebra; dispersion relation; chiral perturbation theory; lattice QCD; CHIRAL PERTURBATION-THEORY; DEPENDENT STRUCTURE-FUNCTION; SPIN STRUCTURE FUNCTIONS; NUCLEAR-STRUCTURE DEPENDENCE; CONSERVED-VECTOR-CURRENT; STRUCTURE FUNCTIONS G(2); EFFECTIVE-FIELD THEORY; SUM-RULES; BRANCHING RATIO; FERMI DECAYS;

D O I：

10.3390/particles4040034

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We review some recent progress in the theory of electroweak radiative corrections in semileptonic decay processes. The resurrection of the so-called Sirlin's representation based on current algebra relations permits a clear separation between the perturbatively-calculable and incalculable pieces in the O(G(F) a ) radiative corrections. The latter are expressed as compact hadronic matrix elements that allow systematic non-perturbative analysis such as dispersion relation and lattice QCD. This brings substantial improvements to the precision of the electroweak radiative corrections in semileptonic decays of pion, kaon, free neutron and J(P)=0(+) nuclei that are important theory inputs in precision tests of the Standard Model. Unresolved issues and future prospects are discussed.

引用

页码：397 / 467

页数：71

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