Pionium as a source of false events in the K -> pi nu nubar decays.
- NázevTitle
- Pionium as a source of false events in the K -> pi nu nubar decays.Pionium as a source of false events in the K -> pi nu nubar decays.
- Druh výsledkuResult type
- Článek v časopiseJournal article
- AutořiAuthors
- P. Lichard
- Klíčová slovaKeywords
- pionium, kaon rare decays
- DOIDOI
- 10.1103/PhysRevD.102.113005
- Časopis / citaceJournal / citation
- Physical Review D 102(11), 113005 (2020) · ISSN 2470-0010
- RokYear
- 2020
- JazykLanguage
- eng
- ZáznamyRecords
- ProjektProject
- Institucionální podpora na rozvoj výzkumné org.Institucionální podpora na rozvoj výzkumné org.
- CitovánoCited by
- 3 (INSPIRE-HEP)
- Plný text (open access)Full text (open access)
- http://link.aps.org/pdf/10.1103/PhysRevD.102.113005
- Citace ke staženíDownload citation
- TXT · BibTeX
AbstraktAbstract
We suggest that the decay modes of kaons with a pion and a pionium (pi+ pi− atom) in the final state can constitute a not yet considered background to the very rare decay K → π ν ν̄. In fact, a part of pioniums may escape the decay region before decaying into two π0s (or to π0 π0 γ in the case of excited pionium). To illustrate the importance of this background, we show that it may even explain, under some assumptions, the unexpected K L decay events that appeared in the KOTO experiment.
We suggest that the decay modes of kaons with a pion and a pionium (pi+ pi− atom) in the final state can constitute a not yet considered background to the very rare decay K → π ν ν̄. In fact, a part of pioniums may escape the decay region before decaying into two π0s (or to π0 π0 γ in the case of excited pionium). To illustrate the importance of this background, we show that it may even explain, under some assumptions, the unexpected K L decay events that appeared in the KOTO experiment.