$Improved measurement of absolute branching fraction of Ds+→τ+ν τ$

Improved measurement of absolute branching fraction of Ds+→τ+ν τ

We have studied the leptonic decay Ds+→τ+ντ, via the decay channel τ+→e+νeν̄τ, using a sample of tagged Ds+ decays collected near the Ds*±Ds peak production energy in e+e- collisions with the CLEO-c detector. We obtain B(Ds+→τ+ντ)=( 5.30±0.47±0.22)% and determine the decay constant fDs=(252.5±11.1±...

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Detalhes bibliográficos
Principais autores:	Onyisi, P, Rosner, J, Alexander, J, Cassel, D, Duboscq, J, Ehrlich, R, Fields, L, Galik, R, Gibbons, L, Gray, R, Gray, S, Hartill, D, Heltsley, B, Hertz, D, Hunt, J, Kandaswamy, J, Kreinick, D, Kuznetsov, V, Ledoux, J, Mahlke-Krüger, H, Mohapatra, D, Patterson, JR, Peterson, D, Riley, D, Ryd, A
Formato:	Journal article
Idioma:	English
Publicado em:	2009

Improved measurement of absolute branching fraction of Ds+→τ+ν τ

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