Search for rare or forbidden decays of the D⁰ meson
Name
PhysRevLett.124.071802.pdf
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377.94 KB
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35aed4dcedb47f1475401128f487e889
Author(s)
Cowan, Ray F
BABAR Collaboration
Date Issued
February 19, 2020
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
BABAR Collaboration (Lees, J.P., et al.), "Search for rare or forbidden decays of the D⁰ meson." Physical Review Letters 124 (Feb. 2020): no. 071802 doi 10.1103/PhysRevLett.124.071802 ©2020 Author(s)
Version
Final published version
Abstract
We present a search for nine lepton-number-violating and three lepton-flavor-violating neutral charm decays of the type D⁰→h′[superscript -]h[superscript -]ℓ′[superscript +]ℓ[superscript +] and D⁰→h′[superscript -]h[superscript +]ℓ′[superscript ±]ℓ[superscript ±], where h and h′ represent a K or π meson and ℓ and ℓ′ an electron or muon. The analysis is based on 468 fb-¹ of e[superscript +]e[superscript -] annihilation data collected at or close to the ϒ(4S) resonance with the BABAR detector at the SLAC National Accelerator Laboratory. No significant signal is observed for any of the twelve modes, and we establish 90% confidence level upper limits on the branching fractions in the range (1.0–30.6)×10-⁷. The limits are between 1 and 3 orders of magnitude more stringent than previous measurements.
MIT Department
Massachusetts Institute of Technology. Laboratory for Nuclear Science
Terms of Use
Creative Commons Attribution 3.0 unported license
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DOI of Published Version
https://doi.org/10.1103/PhysRevLett.124.071802
