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Measurement of Inclusive Radiative B-meson Decays with a Photon Energy Threshold of 1.7 GeV

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arxiv 0907.1384 v2 pith:27X7U3NX submitted 2009-07-08 hep-ex

A. Limosani , et al (for the Belle Collaboration) This is my paper · ORCID
classification hep-ex
keywords b-mesonenergyphotonbranchingfractiongammainclusivemeasurement
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Using 605/fb of data collected at the Upsilon(4S) resonance we present a measurement of the inclusive radiative B-meson decay channel, B to X_s gamma. For the lower photon energy thresholds of 1.7, 1.8, 1.9 and 2.0GeV, 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 1.7GeV threshold we obtain the partial branching fraction BF(B to X_s gamma) = (3.45 +/- 0.15 +/- 0.40) x 10^-4, where the errors are statistical and systematic.

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