An inclusive measurement of the photon energy spectrum in b->s gamma decays

Details An inclusive measurement of the photon energy spectrum in b->s gamma decays An inclusive measurement of the photon energy spectrum in b->s gamma decays

2004-03-02

arxiv.org/abs/hep-ex/0403004v4

Phys.Rev.Lett.93:061803,2004

Physics

High Energy Physics

High Energy Physics - Experiment

RevTex4, 6 pages, Submitted to Phys.Rev.Lett. Replaced: added table of systematic errors. New results take into account radiat

Scientific paper

10.1103/PhysRevLett.93.061803

We report a fully inclusive measurement of the flavour changing neutral current decay b->s gamma in the energy range 1.8 GeV < E* < 2.8 GeV, covering 95% of the total spectrum. Using 140 fb^-1 we obtain BF(b->s gamma)= 3.55 +/- 0.32 +0.30-0.31 +0.11-0.07, where the errors are statistical, systematic and from theory corrections. We also measure the first and second moments of the photon energy spectrum above 1.8 GeV and obtain = 2.292 +/- 0.026 +/- 0.034 GeV and -^2 = 0.0305 +/- 0.0074 +/- 0.0063 GeV^2, where the errors are statistical and systematic.

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