Direct measurement of the absolute branching fraction for D+ ---> anti-K0 mu+ nu(mu) and determination of Gamma (D0 ---> K- mu+ nu(mu))/ Gamma (D+ ---> anti-K0 mu+ nu(mu))
Oct, 20066 pages
Published in:
- Phys.Lett.B 644 (2007) 20-24
e-Print:
- hep-ex/0610020 [hep-ex]
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Abstract: (Elsevier)
The absolute branching fraction for the decay D + → K ¯ 0 μ + ν μ is determined using 5321 ± 149 ± 160 singly tagged D − sample from the data collected around s = 3.773 GeV with the BESII detector at the BEPC collider. In the system recoiling against the singly tagged D − mesons, 28.7 ± 6.4 events for D + → K ¯ 0 μ + ν μ are observed. These yield the absolute branching fraction to be BF ( D + → K ¯ 0 μ + ν μ ) = ( 10.3 ± 2.3 ± 0.8 ) % . The ratio of the two partial widths for the decays D 0 → K − μ + ν μ and D + → K ¯ 0 μ + ν μ is determined to be Γ ( D 0 → K − μ + ν μ ) / Γ ( D + → K ¯ 0 μ + ν μ ) = 0.87 ± 0.24 ± 0.15 .- electron positron: colliding beams
- electron positron: annihilation
- psi(3770): electroproduction
- D: pair production
- D+: semileptonic decay
- anti-K0
- D+: branching ratio
- D+: width
- D0: width
- width: ratio
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