Branching Fraction for the Doubly-Cabibbo-Suppressed Decay D^+ --> K^+ pi^0

TL;DR

This paper reports a precise measurement of the rare doubly-Cabibbo-suppressed decay D+ to K+ pi0, providing valuable data for understanding charm quark decay processes and testing theoretical models.

Contribution

First measurement of the branching fraction for D+ to K+ pi0 decay using CLEO-c data at psi(3770).

Findings

Branching fraction B(D+ to K+ pi0) = (2.28 +- 0.36 +- 0.15 +- 0.08) x 10^{-4}.

Uncertainties include statistical, systematic, and reference mode branching fraction.

Results help refine charm decay models and test the Standard Model predictions.

Abstract

We present a measurement of the branching fraction for the doubly-Cabibbo-suppressed decay D+ to K+ pi0, using 281 pb-1 of data accumulated with the CLEO-c detector on the psi(3770) resonance. We find B(D+ to K+ pi0) = (2.28 +- 0.36 +- 0.15 +- 0.08) times 10^{-4}, where the first uncertainty is statistical, the second is systematic, and the last error is due to the uncertainty in the reference mode branching fraction.