Absolute Branching Fraction Measurements for D+ and D0 Inclusive Semileptonic Decays
Apr, 20069 pages
Published in:
- Phys.Rev.Lett. 97 (2006) 251801
e-Print:
- hep-ex/0604044 [hep-ex]
PDG: semileptonic
Report number:
- CLNS-06-1957,
- CLEO-06-6
Experiments:
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Abstract: (arXiv)
We present measurements of the inclusive branching fractions for the decays D^+ -> X e^+ nu_e and D^0 -> X e^+ nu_e, using 281 pb^-1 of data collected on the psi(3770) resonance with the CLEO-c detector. We find Br(D^0 ->Xe^+\nu_e) = (6.46 \pm 0.17 \pm 0.13)% and Br((D^+ -> Xe^+nu_e) = (16.13 \pm 0.20 \pm 0.33)%. Using the known D meson lifetimes, we obtain the ratio Gamma{D^+}^sl/Gamma_{D^0}^sl= 0.985\pm 0.028\pm 0.015, confirming isospin invariance at the level of 3%. The positron momentum spectra from D^+ and D^0 have consistent shapes.- 14.40.Lb
- 13.20.Fc
- electron positron: colliding beams
- electron positron: annihilation
- psi(3770): electroproduction
- D: pair production
- D: semileptonic decay
- D+: branching ratio
- D0: branching ratio
- width: ratio
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