Measurement of the branching fractions of the radiative charm decays D0→ Kmacr *0γ and D0→ϕγ
Abstract
We present a measurement of the branching fractions for the Cabibbo-favored radiative decay D0→ Kmacr *0γ and the Cabibbo-suppressed radiative decay D0→ϕγ. These measurements are based on a data sample corresponding to an integrated luminosity of 387.1fb-1 and recorded with the BABAR detector at the PEP-II e+e- asymmetric-energy collider operating at center-of-mass energies 10.58 and 10.54 GeV. We measure the branching fractions relative to the well-studied decay D0→K-π+ and find B(D0→ Kmacr *0γ)/B(D0→K-π+)=(8.43±0.51±0.70)×10-3 and B(D0→ϕγ)/B(D0→K-π+)=(7.15±0.78±0.69)×10-4, where the first error is statistical and the second is systematic. This is the first observation of the decay mode D0→ Kmacr *0γ.
- Publication:
-
Physical Review D
- Pub Date:
- October 2008
- DOI:
- 10.1103/PhysRevD.78.071101
- arXiv:
- arXiv:0808.1838
- Bibcode:
- 2008PhRvD..78g1101A
- Keywords:
-
- 13.25.Ft;
- 11.30.Hv;
- 12.38.Qk;
- 12.40.Vv;
- Decays of charmed mesons;
- Flavor symmetries;
- Experimental tests;
- Vector-meson dominance;
- High Energy Physics - Experiment
- E-Print:
- 8 pages, 5 postscript figures, submitted to Phys. Rev. D (Rapid Communications)