Neutral-pion decay into an electron-positron pair: A review and update
| Autor: | Husek, Tomáš |
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| Rok vydání: | 2024 |
| Předmět: | |
| Zdroj: | Phys. Rev. D 110 (2024) 033004 |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1103/PhysRevD.110.033004 |
| Popis: | This work aims to review several aspects of the current status of the rare $\pi^0\to e^+e^-$ decay. A particular emphasis is made on radiative corrections and detailed interpretation of related quantities, some numbers appearing in the literature are updated, and the connection with the Dalitz decay, $\pi^0\to e^+e^-\gamma$, is discussed. This comes timely as it is aligned with an announcement of a preliminary result of a new branching-ratio measurement done by the NA62 Collaboration, which brings new light into an earlier-reported discrepancy between the Standard Model prediction and the (until-recently latest) precise KTeV result. Comment: 10 pages, 5 figures, 2 tables; v2: version accepted for publication in PRD, minor text improvements |
| Databáze: | arXiv |
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