Absolute Branching Fraction Measurements for D+ and D0 Inclusive Semileptonic Decays
Abstract
We present measurements of the inclusive branching fractions for the decays D+→Xe+νe and D0→Xe+νe, using 281pb-1 of data collected on the ψ(3770) resonance with the CLEO-c detector. We find B(D0→Xe+νe)=(6.46±0.17±0.13)% and B(D+→Xe+νe)=(16.13±0.20±0.33)%. Using the known D meson lifetimes, we obtain the ratio ΓD+sl/ΓD0sl=0.985±0.028±0.015, confirming isospin invariance at the level of 3%. The positron momentum spectra from D+ and D0 have consistent shapes.
- Publication:
-
Physical Review Letters
- Pub Date:
- December 2006
- DOI:
- 10.1103/PhysRevLett.97.251801
- arXiv:
- arXiv:hep-ex/0604044
- Bibcode:
- 2006PhRvL..97y1801A
- Keywords:
-
- 13.20.Fc;
- 14.40.Lb;
- Decays of charmed mesons;
- Charmed mesons;
- High Energy Physics - Experiment
- E-Print:
- 6 pages postscript,also available through this http://www.lns.cornell.edu/public/CLNS/2006/