Document type
ArticleVersion
Published versionPublication date
All rights reserved
Please use this identifier to cite or link to this item: https://hdl.handle.net/2445/131758
Searches for rare or forbidden semileptonic charm decays
Journal Title
Director/Tutor
Journal ISSN
Volume Title
Related resource
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.
Subject
Subject (English)
Citation
Citation
GARRA TICÓ, Jordi, GRAUGÉS POUS, Eugeni and BABAR Collaboration. Searches for rare or forbidden semileptonic charm decays. Physical Review D. 2011. Vol. 84, num. 7, pags. 072006. ISSN 1550-7998. [consulted: 18 of August of 2026]. Available at: https://hdl.handle.net/2445/131758