Colangelo, Gilberto; Stucki, Ramon; Tunstall, Lewis (2016). Dispersive treatment of Ks→γγ and Ks→γℓ+ℓ−. European physical journal. C - particles and fields, 76(11) EDP Sciences 10.1140/epjc/s10052-016-4449-2
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We analyse the rare kaon decays K S → γ γ and KS → γl+l− (l = e or μ) in a dispersive framework in which the weak Hamiltonian carries momentum. Our analy- sis extends predictions from lowest order SU (3)L × SU (3)R chiral perturbation theory (χ PT3 ) to fully account for effects from final-state interactions, and is free from ambiguities associated with extrapolating the kaon off-shell. Given input from KS → ππ and γγ(∗) → ππ, we solve the once- subtracted dispersion relations numerically to predict the rates for KS → γγ and KS → γl+l−. In the leptonic modes, we find sizeable corrections to the χ PT3 predictions for the integrated rates.
Item Type: |
Journal Article (Original Article) |
|---|---|
Division/Institute: |
10 Strategic Research Centers > Albert Einstein Center for Fundamental Physics (AEC) 08 Faculty of Science > Institute of Theoretical Physics |
UniBE Contributor: |
Colangelo, Gilberto, Stucki, Ramon, Tunstall, Lewis |
Subjects: |
500 Science > 530 Physics |
ISSN: |
1434-6044 |
Publisher: |
EDP Sciences |
Language: |
English |
Submitter: |
Esther Fiechter |
Date Deposited: |
14 Dec 2016 16:13 |
Last Modified: |
05 Dec 2022 15:00 |
Publisher DOI: |
10.1140/epjc/s10052-016-4449-2 |
ArXiv ID: |
1609.03574 |
BORIS DOI: |
10.7892/boris.91501 |
URI: |
https://boris.unibe.ch/id/eprint/91501 |
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