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

Result code in 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>

Result on the web

<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>

Result language

angličtina

Original language name

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

Czech name

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Czech description

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Type

J_imp - 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

—

Continuities

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

Name of the periodical

Physical Review D

ISSN

2470-0010

e-ISSN

2470-0029

Volume of the periodical

102

Issue of the periodical within the volume

11

Country of publishing house

US - UNITED STATES

Number of pages

5

Pages from-to

"113005-1"-"113005-5"

UT code for WoS article

000600276500002

EID of the result in the Scopus database

2-s2.0-85098151581