Measurement of B(D+ -> mu+ nu) and the pseudoscalar decay constant f_D at CLEO
Istvan Danko (for the CLEO Collaboration)
TL;DR
This paper reports the first significant measurement of the D+ -> mu+ nu decay branching fraction and the decay constant f_D using data from the CLEO-c detector, providing important tests of theoretical models.
Contribution
It presents the first statistically significant measurement of B(D+ -> mu+ nu) and f_D at CLEO, advancing understanding of pseudoscalar meson decays.
Findings
Measured B(D+ -> mu+ nu) = (3.5 +- 1.4 +- 0.6) x 10^-4
Determined f_D = (202 +- 41 +- 17) MeV
First significant signal for this decay mode
Abstract
The analysis of 60 1/pb data collected on the psi(3770) resonance with the CLEO-c detector has produced the first statistically significant signal for D+ -> mu+ nu decay and led to the measurement of the decay branching fraction B(D+ -> mu+ nu) = (3.5 +- 1.4 +- 0.6) x 10-4 and the pseudoscalar decay constant f_D = (202 +- 41 +- 17) MeV.
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