We present a measurement of the branching fractions for the Cabibbo-favored radiative decay D(0)->(K)overbar(*0)gamma and the Cabibbo-suppressed radiative decay D(0)->phi gamma. These measurements are based on a data sample corresponding to an integrated luminosity of 387.1 fb(-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 D(0)-> K(-)pi(+) and find B(D(0)->(K)overbar(*0)gamma)/B(D(0)-> K(-)pi(+))=(8.43 +/- 0.51 +/- 0.70)x10(-3) and B(D(0)->phi gamma)/B(D(0)-> K(-)pi(+))=(7.15 +/- 0.78 +/- 0.69)x10(-4), where the first error is statistical and the second is systematic. This is the first observation of the decay mode D(0)->(K)overbar(*0)gamma.

Measurement of the branching fractions of the radiative charm decays D(0)->(K)overbar(*0)gamma and D(0)->phi gamma

Baracchini E;Ferroni F;
2008

Abstract

We present a measurement of the branching fractions for the Cabibbo-favored radiative decay D(0)->(K)overbar(*0)gamma and the Cabibbo-suppressed radiative decay D(0)->phi gamma. These measurements are based on a data sample corresponding to an integrated luminosity of 387.1 fb(-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 D(0)-> K(-)pi(+) and find B(D(0)->(K)overbar(*0)gamma)/B(D(0)-> K(-)pi(+))=(8.43 +/- 0.51 +/- 0.70)x10(-3) and B(D(0)->phi gamma)/B(D(0)-> K(-)pi(+))=(7.15 +/- 0.78 +/- 0.69)x10(-4), where the first error is statistical and the second is systematic. This is the first observation of the decay mode D(0)->(K)overbar(*0)gamma.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/20.500.12571/1407
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