Tunstall, Lewis; Colangelo, Gilberto; Stucki, Ramon (27 March 2017). Dispersive analysis of K S → γγ and K S → γl + l −. Journal of Physics: Conference Series, 800(1), 012034. Institute of Physics Publishing IOP 10.1088/1742-6596/800/1/012034
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We calculate the decay rates for KS → γγ and KS → γl + l − (l = e or μ)within a dispersive framework in which the weak Hamiltonian carries momentum. Given input from KS → ππ and γγ (*)→ππ, we solve the once-subtracted dispersion relations numerically and find that final-state ππ interactions generate sizeable corrections to the predictions from 3-flavour chiral perturbation theory. Our analysis predicts BR(KS → γγ) = (2.34 ± 0.31) × 10−6, BR(KS → γe + e −) = (4.38 ± 0.57) × 10−8, and BR(KS → γμ + μ −) = (1.45 ± 0.27) × 10−9.
Item Type: |
Conference or Workshop Item (Paper) |
|---|---|
Division/Institute: |
10 Strategic Research Centers > Albert Einstein Center for Fundamental Physics (AEC) 08 Faculty of Science > Institute of Theoretical Physics |
UniBE Contributor: |
Tunstall, Lewis, Colangelo, Gilberto, Stucki, Ramon |
Subjects: |
500 Science > 530 Physics |
ISSN: |
1742-6588 |
Publisher: |
Institute of Physics Publishing IOP |
Language: |
English |
Submitter: |
Esther Fiechter |
Date Deposited: |
03 Nov 2017 10:07 |
Last Modified: |
05 Dec 2022 15:06 |
Publisher DOI: |
10.1088/1742-6596/800/1/012034 |
BORIS DOI: |
10.7892/boris.102043 |
URI: |
https://boris.unibe.ch/id/eprint/102043 |
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