Light quark loops in $K^\pm \to \pi^\pm \nu\bar\nu$ from vector meson dominance and update on the Kaon Unitarity Triangle

Autor:	Lunghi, E., Soni, A.
Rok vydání:	2024
Předmět:	High Energy Physics - Phenomenology High Energy Physics - Experiment
Druh dokumentu:	Working Paper
Popis:	We use vector meson dominance to calculate non-perturbative contributions to the branching ratio of the rare decay $K^\pm \to \pi^\pm \nu\bar \nu$ stemming from matrix elements involving up-quark loops. The importance of this observable as well as of $K^0 \to \pi^0 l^+ l^-$ and of the direct CP violation parameter $\epsilon_K^{\prime}$ is then discussed in the context of a Unitarity Triangle sqtudy based on Kaon sector observables only. Comment: 22 pages, 5 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2408.11190 Zobrazit plný text záznamu View this record from Arxiv