Author:
Dery Avital,Ghosh Mitrajyoti,Grossman Yuval,Schacht Stefan
Abstract
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%.
Publisher
Springer Science and Business Media LLC
Subject
Nuclear and High Energy Physics
Cited by
15 articles.
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