Work

Predictions for the Rare Kaon Decays KS,L → π0ℓ+ℓ− from QCD in the Limit of a Large Number of Colours

Year: 2024

Type: article

Abstract: The long-distance and non-local parts of the form factors describing the single-photon-mediated KS,L→π0γ*→π0ℓ+ℓ− (ℓ=e,μ) transitions in the standard model are addressed in QCD regarding the limit where the number Nc of colours becomes infinite. It is shown that this provides a suitable theoretical framework to study these decay modes and that it enables predicting the decay rates for KS→π0ℓ+ℓ−. It also unambiguously predicts that the interference between the direct and indirect CP-violating contributions to the decay rate for KL→π0ℓ+ℓ− is constructive.

Source: Universe

DOI: 10.3390/universe10120457

Authors: Giancarlo D’Ambrosio, Marc Knecht

Institutions: Istituto Nazionale di Fisica Nucleare, Sezione di Napoli, Centre National de la Recherche Scientifique, Aix-Marseille Université, Centre de Physique Théorique

Language: English

Topic: Particle physics theoretical and experimental studies

Subfield: Nuclear and High Energy Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,728

OpenAlex ID: W4405443168

FWCI: 0.071

Cites: 46

Cited by: 1

Related to: 10