Searches for Rare or Forbidden Semileptonic Charm Decays

Journal Article · Mon Aug 15 04:00:00 EDT 2011 · Submitted to Physical Review D

DOI:https://doi.org/10.1103/PhysRevD.84.072006· OSTI ID:1022537

Lees, J P

We present searches for rare or forbidden charm decays of the form X{sub c}{sup +} {yields} h{sup {+-}}{ell}{sup {-+}}{ell}{sup ({prime})+}, where X{sub c}{sup +} is a charm hardron (D{sup +}, D{sub s}{sup +}, or {Lambda}{sub c}{sup +}), h{sup {+-}} is a pion, kaon, or proton, and {ell}{sup ({prime}){+-}} is an electron or muon. The analysis is based on 384 fb{sup -1} of e{sup +}e{sup -} annihilation data collected at or close to the {Upsilon}(4S) 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 x 10{sup -6} and 44 x 10{sup -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.

• Research Organization: SLAC National Accelerator Laboratory (SLAC)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC02-76SF00515
• OSTI ID: 1022537
• Report Number(s): SLAC-PUB-14482; arXiv:1107.4465
• Journal Information: Submitted to Physical Review D, Journal Name: Submitted to Physical Review D Journal Issue: 7 Vol. 84; ISSN 1550-7998
• Country of Publication: United States
• Language: English

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