2007/04/30 by CLEO Collaboration, S. Blusk, M. Artuso +98 · 54 citations
Physics and Astronomy · #Computer science #Constant (computer programming) #Neutrino Physics Research #Particle physics theoretical and experimental studies #Physics #Quantum Chromodynamics and Particle Interactions #hep-ex #hep-lat #hep-ph
paper · pdf · doi:10.1103/physrevlett.99.071802
published in Physical Review Letters 99(7), 071802 (American Physical Society) · 6 pages postscript,also available through http://www.lns.cornell.edu/public/CLNS/2007/
arxiv created 2007/08/17 · openalex publication_date 2007/08/17 · arxiv updated 2010/04/08 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We measure the decay constant f_Ds+ using the Ds+\ensuremath→\ensuremathℓ+\ensuremathν channel, where the \ensuremathℓ+ designates either a \ensuremathμ+ or a \ensuremathτ+, when the \ensuremathτ+\ensuremath→\ensuremathπ+\ensuremathν. Using both measurements we find f_Ds+=274\ifmmode±\else\textpm\fi13\ifmmode±\else\textpm\fi7 MeV. Combining with our previous determination of f_D+, we compute the ratio f_Ds+/f_D+=1.23\ifmmode±\else\textpm\fi0.11\ifmmode±\else\textpm\fi0.04. We compare with theoretical estimates.