Leptonic and Semileptonic Charm Decays from CLEO-c

TL;DR

This paper reports precise measurements of leptonic decay constants and form factors for charm mesons from CLEO-c, providing valuable data for testing theoretical models in particle physics.

Contribution

It presents new experimental results on leptonic decay constants and form factors for charm mesons, with comparisons to theoretical predictions.

Findings

Measured decay constants: fD+ and fDs+

Determined ratio fDs+/fD+

Provided form-factor measurements in pseudoscalar decays

Abstract

I describe CLEO-c purely leptonic decay results leading to fD+=(222.6 +/- 16.7^{+2.8}_{-3.4}) MeV, fDs+=(280.1 +/- 11.6 +/- 6.0) MeV, and fDs+/fD+=1.26 +/- 0.11 +/-0.03. Form-factor measurements in Cabibbo favored and suppressed pseudoscalar decays are presented. Some comparisons are made with theoretical predictions.