Search for rare or forbidden decays of the D0 meson

We present a search for nine lepton-number-violating and three lepton-flavor-violating neutral charm decays of the type D0→h'−h−ℓ'+ℓ+ and D0→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− annihilatio...

Ausführliche Beschreibung

Gespeichert in:

Bibliographische Detailangaben
Hauptverfasser:	Lees, Jean-Pierre, Poireau, Vincent, Tisserand, Vincent, Grauges, Eugeni, Palano, Antimo, Eigen, Gerald, Brown, David Nathan, Kolomensky, Yury G, Fritsch, Miriam, Koch, Helmut, Schroeder, Torsten, Cheaib, Racha, Hearty, Christopher, Mattison, Tom S, McKenna, Janis A, So, Rocky Y, Blinov, Vladimir E, Buzykaev, Alexey, Druzhinin, Vladimir P, Golubev, Vladimir B, Kozyrev, Evgeny A, Kravchenko, Evgeniy A, Onuchin, Alexei P, Serednyakov, Sergey I, Skovpen, Yuri I, Solodov, Evgeni Petrovich, Todyshev, Korneliy Yu, Lankford, Andrew J, Dey, Biplab, Gary, J. William, Long, Owen, Eisner, Alan M, Lockman, William S, Panduro-Vazquez, William, Chao, Daniel S, Cheng, Chih-Hsiang, Echenard, Bertrand, Flood, Kevin T, Hitlin, David G, Kim, Jae, Lee, Myeongjae, Miyashita, Tomonari S, Ongmongkolkul, Piti, Porter, Frank C, Röhrken, Markus, Huard, Zachary, Meadows, Brian T, Pushpawela, Buddhi G, Sokoloff, Michael D, Sun, Liang, BABAR, Collaboration
Format:	Artikel
Sprache:	eng
Online-Zugang:	Volltext bestellen
Tags:	Tag hinzufügen Keine Tags, Fügen Sie den ersten Tag hinzu!

Beschreibung
Zusammenfassung:	We present a search for nine lepton-number-violating and three lepton-flavor-violating neutral charm decays of the type D0→h'−h−ℓ'+ℓ+ and D0→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.