J
2020
Pionium as a source of false events in the K -> pi nu(nu)over-bar, decays
LICHARD, Peter
Basic information
Original name
Pionium as a source of false events in the K -> pi nu(nu)over-bar, decays
Authors
LICHARD, Peter (703 Slovakia, guarantor, belonging to the institution)
Edition
Physical Review D, 2020, 2470-0010
Other information
Type of outcome
Článek v odborném periodiku
Field of Study
10303 Particles and field physics
Country of publisher
United States of America
Confidentiality degree
není předmětem státního či obchodního tajemství
RIV identification code
RIV/47813059:19630/20:A0000054
Organization unit
Institute of physics in Opava
Keywords in English
decay;pionium;kaon
Tags
International impact, Reviewed
Links
LTI17018, research and development project.
V originále
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.
Displayed: 27/12/2024 00:46