Relativistic Corrections to the Fermi Matrix Element

1958 ◽  
Vol 1 (12) ◽  
pp. 456-457 ◽  
Author(s):  
A. Altman ◽  
W. M. MacDonald
1990 ◽  
Vol 42 (7) ◽  
pp. 3789-3794 ◽  
Author(s):  
Gerrard Aissing ◽  
Hendrik J. Monkhorst

2021 ◽  
Vol 2021 (7) ◽  
Author(s):  
Avital Dery ◽  
Mitrajyoti Ghosh ◽  
Yuval Grossman ◽  
Stefan Schacht

Abstract The K → μ+μ− decay is often considered to be uninformative of fundamental theory parameters since the decay is polluted by long-distance hadronic effects. We demonstrate that, using very mild assumptions and utilizing time-dependent interference effects, ℬ(KS → μ+μ−)ℓ=0 can be experimentally determined without the need to separate the ℓ = 0 and ℓ = 1 final states. This quantity is very clean theoretically and can be used to test the Standard Model. In particular, it can be used to extract the CKM matrix element combination $$ \mid {V}_{ts}{V}_{td}\sin \left(\beta +{\beta}_s\right)\mid \approx \mid {A}^2{\lambda}^5\overline{\eta}\mid $$ ∣ V ts V td sin β + β s ∣ ≈ ∣ A 2 λ 5 η ¯ ∣ with hadronic uncertainties below 1%.


2020 ◽  
Vol 101 (3) ◽  
Author(s):  
Nora Brambilla ◽  
Wen Chen ◽  
Yu Jia ◽  
Vladyslav Shtabovenko ◽  
Antonio Vairo

Sign in / Sign up

Export Citation Format

Share Document