Direct measurement of the branching fraction for the decay of D+ ---> anti-K0 e+ nu(e) and determination of Gamma (D0 ---> K- e+ nu(e)) / Gamma (D+ ---> anti-K0 e+ nu(e))
Collaboration
6 pages
Published in:
- Phys.Lett.B 608 (2005) 24-30
e-Print:
- hep-ex/0410030 [hep-ex]
Experiments:
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Citations per year
Abstract: (Elsevier)
The absolute branching fraction for the decay D+→K¯0e+νe is determined using 5321±149±160 singly tagged D− event sample from the data collected around 3.773 GeV with the BES-II detector at the BEPC collider. In the system recoiling against the singly tagged D− mesons, 34.4±6.1 events for D+→K¯0e+νe are observed. Those yield the absolute branching fraction to be BF(D+→K¯0e+νe)=(8.95±1.59±0.67)% . The ratio of the two partial widths for the decays of D0→K−e+νe and D+→K¯0e+νe is determined to be Γ(D0→K−e+νe)/Γ(D+→K¯0e+νe)=1.08±0.22±0.07 .Note:
- 6 pages, 6 figures, Submitted to Physics Letters B
- electron positron: colliding beams
- electron positron: annihilation
- psi(3770): electroproduction
- D: pair production
- D+: semileptonic decay
- D-: hadronic decay
- D+: branching ratio
- D+: width
- D0: width
- width: ratio
References(4)
Figures(7)