Leptonic decays of the D<inf>s</inf> meson

A. Heister, S. Schael, R. Barate, I. De Bonis, D. Decamp, C. Goy, J. P. Lees, E. Merle, M. N. Minard, B. Pietrzyk, G. Boix, S. Bravo, M. P. Casado, M. Chmeissani, J. M. Crespo, E. Fernandez, M. Fernandez-Bosman, Ll Garrido, E. Graugés, M. MartinezG. Merino, R. Miquel, Ll M. Mir, A. Pacheco, H. Ruiz, A. Colaleo, D. Creanza, M. De Palma, G. Iaselli, G. Maggi, M. Maggi, S. Nuzzo, A. Ranieri

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22 Citations (Scopus)


The purely leptonic decays Ds → τv and Ds → μv are studied in a sample of four million hadronic Z decays collected with the ALEPH detector at the LEP e+e- collider from 1991 to 1995. The branching fractions are extracted from a combination of two analyses, one optimized to select Ds → τv decays with τ → evv̄ or μvv̄, and the other optimized for Ds → μv decays. The results are used to evaluate the Ds decay constant, within the Standard Model: fDs = [285 ± 19(stat) ± 40(syst)] MeV. © 2002 Elsevier Science B.V. All rights reserved.
Original languageEnglish
Pages (from-to)1-18
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Issue number1-2
Publication statusPublished - 28 Feb 2002


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