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

Research output: Contribution to conferencePaper

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)
StatePublished - Dec 1 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

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Fingerprint Dive into the research topics of 'The purely leptonic decays D<sup>+</sup> → μ<sup>+</sup>ν and D<sub>s</sub><sup>+</sup> → ℓ<sup>+ν</sup> at CLEO'. Together they form a unique fingerprint.

  • Cite this

    Stone, S. (2008). The purely leptonic decays D+ → μ+ν and Ds+ → ℓ at CLEO. Paper presented at 6th Conference on Flavor Physics and CP Violation Conference, FPCP 2008, Taipei, Taiwan, Province of China.