Pionium as a source of false events in the K -> pi nu(nu)over-bar, decays

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F47813059%3A19630%2F20%3AA0000054" target="_blank" >RIV/47813059:19630/20:A0000054 - isvavai.cz</a>
Result on the web
<a href="https://journals.aps.org/prd/abstract/10.1103/PhysRevD.102.113005" target="_blank" >https://journals.aps.org/prd/abstract/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>

Result language
angličtina
Original language name
Pionium as a source of false events in the K -> pi nu(nu)over-bar, decays
Original language description
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 -> pi nu(nu over bar). In fact, a part of pioniums may escape the decay region before decaying into two pi(0)s (or to pi(0)pi(0)gamma 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.
Czech name
—
Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
10303 - Particles and field physics

Project
<a href="/en/project/LTI17018" target="_blank" >LTI17018: Promotion and Development of International Scientific Cooperation in Relativistic Astrophysics and Preparation of X-ray Space Missions</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2020
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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