title: Measurement of inclusive radiative B-meson decays with a photon energy threshold of 1.7 GeV.
abstract: Using 605 fb(-1) of data collected at the Upsilon(4S) resonance we present a measurement of the inclusive radiative B-meson decay channel, B-->X(s)gamma. For the lower photon energy thresholds of 1.7, 1.8, 1.9, and 2.0 GeV, as defined in the rest frame of the B meson, we measure the partial branching fraction and the mean and variance of the photon energy spectrum. At the 1.7 GeV threshold we obtain the partial branching fraction BF(B-->X(s)}gamma)=(3.45+/-0.15+/-0.40)x10(-4), where the errors are statistical and systematic.
authors.affiliation: University of Melbourne, School of Physics, Victoria 3010.
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mesh_terms: D008027:Light; D008651:Mesons; D017785:Photons; D013057:Spectrum Analysis; D013816:Thermodynamics