First search for KL →π0γ

(KOTO Collaboration)

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


We report the first search for the KL→π0γ decay, which is forbidden by Lorentz invariance, using the data from 2016 to 2018 at the J-PARC KOTO experiment. With a single event sensitivity of (7.1±0.3stat±1.6syst)×10-8, no candidate event was observed in the signal region. The upper limit on the branching fraction was set to be 1.7×10-7 at the 90% confidence level.

Original languageEnglish
Article number051103
JournalPhysical Review D
Issue number5
Publication statusPublished - 2020 Sept

Bibliographical note

Publisher Copyright:
© 2020 authors. Published by the American Physical Society.

ASJC Scopus subject areas

  • Nuclear and High Energy Physics


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