Search for Rare or Forbidden Decays of the <i>D</i><SUP>0</SUP> Meson

Lees, JP, Poireau, V, Tisserand, V, Grauges, E, Palano, A, Eigen, G, Brown, DN, Kolomensky, Yu G, Fritsch, M, Koch, H
et al (show 229 more authors) (2020) Search for Rare or Forbidden Decays of the <i>D</i><SUP>0</SUP> Meson. PHYSICAL REVIEW LETTERS, 124 (7). 071802-.

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We present a search for nine lepton-number-violating and three lepton-flavor-violating neutral charm decays of the type D^{0}→h^{'-}h^{-}ℓ^{'+}ℓ^{+} and D^{0}→h^{'-}h^{+}ℓ^{'±}ℓ^{∓}, 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^{+}e^{-} 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.

Item Type: Article
Additional Information: 8 pages, 2 figures
Uncontrolled Keywords: <i>B<span class="sc">a</span>B<span class="sc">ar</span></i> Collaboration
Divisions: Faculty of Science and Engineering > School of Physical Sciences
Depositing User: Symplectic Admin
Date Deposited: 08 May 2019 10:26
Last Modified: 18 Oct 2023 15:50
DOI: 10.1103/PhysRevLett.124.071802
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