Abstract
A search for the K+ → π+X decay, where X is a long-lived feebly interacting particle, is performed through an interpretation of the Kpinn analysis of data collected in 2017 by the NA62 experiment at CERN. Two ranges of X masses, 0–110 MeV/c2 and 154–260 MeV/c2, and lifetimes above 100 ps are considered. The limits set on the branching ratio, BR(K+ → π+X), are competitive with previously reported searches in the first mass range, and improve on current limits in the second mass range by more than an order of magnitude.
Original language | English |
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Article number | 58 |
Journal | JHEP |
Volume | 2021 |
Issue number | 3 |
DOIs | |
Publication status | Published - 4 Mar 2021 |
Keywords
- Beyond Standard Model
- Exotics
- Fixed target experiments
ASJC Scopus subject areas
- Nuclear and High Energy Physics