Direct Measurements of the Branching Fractions for the Semileptonic Decays D⁰ → K^-μ⁺ν_μ and D⁰ → π^-μ⁺ν_μ

2006/10/08 by M. Ablikim, BES Collaboration, Ablikim, M.
Computer Science · Physics and Astronomy · #Computational Physics and Python Applications #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #hep-ex

paper · pdf · doi:10.48550/arxiv.hep-ex/0610019

7 pages, 6 figures

openalex publication_date 2006/10/08 · arxiv created 2006/11/30 · arxiv updated 2012/08/03 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

Based on the data sample of 33 pb^-1 collected at and around 3.773 GeV with the BES-II detector at the BEPC collider, the absolute branching fractions for the semileptonic decays D⁰→ K^-μ⁺ν_μ and D⁰→π^-μ⁺ν_μ have been measured. In the system recoiling against 7584±198±341 singly tagged D⁰ mesons, 87.2±13.6 events for D⁰→ K^-μ⁺ν_μ and 9.3±7.4 events for D⁰→π^-μ⁺ν_μ are observed. These yield the absolute branching fractions to be BF(D⁰→ K^-μ⁺ν_μ)= (3.55±0.56±0.59)% and BF(D⁰→π^-μ⁺ν_μ)= (0.38±0.30±0.10)%. The measured branching fraction for D⁰→ K^-μ⁺ν_μ was previously used to determine the ratio Γ(D⁰→ K^-μ⁺ν_μ)/ Γ(D⁺→ K⁰μ⁺ν_μ) combining the previously measured branching fraction for D⁺→ K⁰μ⁺ν_μ by the BES Collaboration.

Related

• Measurements of absolute branching fractions of D⁰⁽⁺⁾→ KKKπ decays
• Measurements of branching fractions of D⁰→ K^- 3π⁺2π^-, D⁰→ K^- 2π⁺π^-2π⁰ and D⁺→ K^- 3π⁺π^-π⁰
• First Measurement of the D_s⁺→ K⁰μ⁺ν_μ Decay
• Measurement of the branching fractions of D⁺ → K⁺K^-π⁺π⁺π^-, ϕπ⁺π⁺π^-, K⁰_SK⁺π⁺π^-π⁰, K⁰_SK⁺η, and K⁰_SK⁺ω decays
• Precision Measurement of the Branching Fraction of D⁺→ μ⁺ν_μ