Related Experiment Video
Updated: Jul 4, 2026

Setting Limits on Supersymmetry Using Simplified Models
Published on: November 15, 2013
Measurement of the absolute branching fraction of Ds+ --> tau+ nutau decay
K M Ecklund1, W Love, V Savinov
1State University of New York at Buffalo, Buffalo, New York 14260, USA.
Abstract:
Using a sample of tagged D(s)(+) decays collected near the D(s)(*+/-)D(s)(-/+) peak production energy in e(+)e(-) collisions with the CLEO-c detector, we study the leptonic decay D(s)(+)-->tau(+)nu(tau) via the decay channel tau(+)-->e(+)nu(e)nu(tau). We measure B(D(s)(+)-->tau(+)nu(tau))=(6.17+/-0.71+/-0.34)%, where the first error is statistical and the second systematic. Combining this result with our measurements of D(s)(+)-->mu(+)nu(mu) and D(s)(+)-->tau(+)nu(tau) (via tau(+)-->pi(+)nu(tau)), we determine f(D(s))=(274+/-10+/-5) MeV.
Related Concept Videos
Radioactive Decay and Radiometric Dating
Atomic Nuclei: Nuclear Spin State Population Distribution
Radioactivity and Nuclear Equations
A nuclide of an element has a specific number of protons and...
Kendall's Tau Test
A τ value of +1 indicates that...
¹³C NMR: ¹H–¹³C Decoupling
A broadband decoupling technique is used to simplify these complex, sometimes overlapping, signals. Broadband decoupling relies on a...
Nuclear Stability
To hold positively charged protons together in the...

