Pionium as a source of false events in the K -> pi nu nubar decays.

Kód výsledku v IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21670%2F20%3A00344922" target="_blank" >RIV/68407700:21670/20:00344922 - isvavai.cz</a>
Výsledek na webu
<a href="https://doi.org/10.1103/PhysRevD.102.113005" target="_blank" >https://doi.org/10.1103/PhysRevD.102.113005</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1103/PhysRevD.102.113005" target="_blank" >10.1103/PhysRevD.102.113005</a>

Jazyk výsledku
angličtina
Název v původním jazyce
Pionium as a source of false events in the K -> pi nu nubar decays.
Popis výsledku v původním jazyce
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 ν. 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.
Název v anglickém jazyce
Pionium as a source of false events in the K -> pi nu nubar decays.
Popis výsledku anglicky
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 ν. 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.

Projekt
—
Návaznosti
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění
2020
Kód důvěrnosti údajů
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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