Amplitude analysis and branching fraction measurement of the Cabibbo-favored decay D⁺ → K^-π⁺π⁺π⁰

2024/12/15 by BESIII Collaboration, Ablikim, M., Achasov, M. N. +657
#FOS: Physical sciences #High Energy Physics - Experiment (hep-ex)

paper · doi:10.48550/arxiv.2412.11040

Abstract

An amplitude analysis of the Cabibbo-favored decay D⁺ → K^-π⁺π⁺π⁰ is performed, using 7.93 \rmfb^-1 of e⁺e^- collision data collected with the BESIII detector at the center-of-mass energy of 3.773 GeV. The branching fractions of the intermediate processes are measured, with the dominant contribution D⁺ → K^*(892)⁰ρ(770)⁺ observed to have a branching fraction of (4.15±0.07_{\rm stat.}±0.17_{\rm syst.})%. With the detection efficiency derived from the amplitude analysis, the absolute branching fraction of D⁺ → K^-π⁺π⁺π⁰ is measured to be (6.06±0.04_{\rm stat.}±0.07_{\rm syst.})%.

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