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http://hdl.handle.net/2445/131758
Title: | Searches for rare or forbidden semileptonic charm decays |
Author: | Garra Ticó, Jordi Graugés Pous, Eugeni BABAR Collaboration |
Keywords: | Física de partícules Experiments Particle physics Experiments |
Issue Date: | 28-Oct-2011 |
Publisher: | American Physical Society |
Abstract: | We present searches for rare or forbidden charm decays of the form X + c → h ± ℓ ∓ ℓ ( ' ) + , where X + c is a charm hadron ( D + , D + s , or Λ + c ), h ± is a pion, kaon, or proton, and ℓ ( ' ) ± is an electron or muon. The analysis is based on 384 fb − 1 of e + e − annihilation data collected at or close to the Υ ( 4 S ) resonance with the BABAR detector at the SLAC National Accelerator Laboratory. No significant signal is observed for any of the 35 decay modes that are investigated. We establish 90% confidence-level upper limits on the branching fractions between 1 × 10 − 6 and 44 × 10 − 6 depending on the channel. In most cases, these results represent either the first limits or significant improvements on existing limits for the decay modes studied. |
Note: | Reproducció del document publicat a: https://doi.org/10.1103/PhysRevD.84.072006 |
It is part of: | Physical Review D, 2011, vol. 84, num. 7, p. 072006 |
URI: | http://hdl.handle.net/2445/131758 |
Related resource: | https://doi.org/10.1103/PhysRevD.84.072006 |
ISSN: | 1550-7998 |
Appears in Collections: | Articles publicats en revistes (Física Quàntica i Astrofísica) |
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