We present a search for nine lepton-number-violating and three lepton-flavor-violating neutral charm decays of the type D0→h′-h-′++ and D0→h′-h+′±, where h and h′ represent a K or π meson and and ′ an electron or muon. The analysis is based on 468 fb-1 of e+e- annihilation data collected at or close to the (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.

Lees, J., Poireau, V., Tisserand, V., Grauges, E., Palano, A., Eigen, G., et al. (2020). Search for Rare or Forbidden Decays of the D0 Meson. PHYSICAL REVIEW LETTERS, 124(7) [10.1103/PhysRevLett.124.071802].

Search for Rare or Forbidden Decays of the D0 Meson

Carpinelli M.;
2020

Abstract

We present a search for nine lepton-number-violating and three lepton-flavor-violating neutral charm decays of the type D0→h′-h-′++ and D0→h′-h+′±, where h and h′ represent a K or π meson and and ′ an electron or muon. The analysis is based on 468 fb-1 of e+e- annihilation data collected at or close to the (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.
Articolo in rivista - Articolo scientifico
Bosons; BaBar detector; Branching fractions; Confidence levels; E+e- annihilation; Forbidden decays; Lepton number; Lepton-flavor; Orders of magnitude
English
2020
124
7
071802
none
Lees, J., Poireau, V., Tisserand, V., Grauges, E., Palano, A., Eigen, G., et al. (2020). Search for Rare or Forbidden Decays of the D0 Meson. PHYSICAL REVIEW LETTERS, 124(7) [10.1103/PhysRevLett.124.071802].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/395233
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