The purely leptonic decays D+ → μ+ν and Ds + → ℓ+ν at CLEO

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

We update our previous results by increasing the luminosity, the efficiency, and for the Ds + the number of tags. We determine fD+ = (205.8 ± 8.5 ± 2.5) MeV, and an interim preliminary value of fDs + = (267.9 ± 8.2 ± 3.9) MeV, where both results are radiatively corrected. We agree with the recent most precise unquenched Lattice-QCD calculation for the D+, but are in disagreement for the Ds +. Several consequences are discussed, including the possibility of physics beyond the Standard Model.

Original languageEnglish (US)
Title of host publicationProceedings of 6th Conference on Flavor Physics and CP Violation, FPCP 2008
StatePublished - 2008
Event6th Conference on Flavor Physics and CP Violation Conference, FPCP 2008 - Taipei, Taiwan, Province of China
Duration: May 5 2008May 9 2008

Other

Other6th Conference on Flavor Physics and CP Violation Conference, FPCP 2008
CountryTaiwan, Province of China
CityTaipei
Period5/5/085/9/08

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quantum chromodynamics
luminosity
physics
decay

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Cite this

Stone, S. (2008). The purely leptonic decays D+ → μ+ν and Ds + → ℓ+ν at CLEO. In Proceedings of 6th Conference on Flavor Physics and CP Violation, FPCP 2008

The purely leptonic decays D+ → μ+ν and Ds + → ℓ+ν at CLEO. / Stone, Sheldon.

Proceedings of 6th Conference on Flavor Physics and CP Violation, FPCP 2008. 2008.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Stone, S 2008, The purely leptonic decays D+ → μ+ν and Ds + → ℓ+ν at CLEO. in Proceedings of 6th Conference on Flavor Physics and CP Violation, FPCP 2008. 6th Conference on Flavor Physics and CP Violation Conference, FPCP 2008, Taipei, Taiwan, Province of China, 5/5/08.
Stone S. The purely leptonic decays D+ → μ+ν and Ds + → ℓ+ν at CLEO. In Proceedings of 6th Conference on Flavor Physics and CP Violation, FPCP 2008. 2008
Stone, Sheldon. / The purely leptonic decays D+ → μ+ν and Ds + → ℓ+ν at CLEO. Proceedings of 6th Conference on Flavor Physics and CP Violation, FPCP 2008. 2008.
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