@article{f2003a7d52a6404e9e86893f0c059120,
title = "Indirect upper limits on ℓi →ℓjγγ from ℓi →ℓjγ",
abstract = "We perform an effective field theory analysis to correlate the charged lepton flavor violating processes ℓi→ℓjγγ and ℓi→ℓjγ. Using the current upper bounds on the rate for ℓi→ℓjγ, we derive model-independent upper limits on the rates for ℓi→ℓjγγ. Our indirect limits are about three orders of magnitude stronger than the direct bounds from current searches for μ→eγγ, and four orders of magnitude better than current bounds for τ→ℓγγ. We also stress the relevance of Belle II or a Super Tau Charm Facility to discover the rare decay τ→ℓγγ.",
author = "Fabiola Fortuna and Alejandro Ibarra and Xabier Marcano and Marcela Mar{\'i}n and Pablo Roig",
note = "Publisher Copyright: {\textcopyright} 2023 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the {"}https://creativecommons.org/licenses/by/4.0/{"}Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by SCOAP3.",
year = "2023",
month = jan,
day = "1",
doi = "10.1103/PhysRevD.107.015027",
language = "English",
volume = "107",
journal = "Physical Review D",
issn = "2470-0010",
publisher = "American Physical Society",
number = "1",
}