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Title: Measurement of $B \to X \gamma$ Decays and Determination of $|V_{td}/V_{ts}|$
Authors: Babar Collaboration, Azzolini, Virginia, López-March, Neus, Martínez-Vidal, Fernando, Milanés, Diego A., Oyanguren, Arantza, Aubert, B.
Issue Date: 23-Apr-2009
Publisher: American Physical Society
Abstract: Using a sample of 383x10(6) BB events collected by the BABAR experiment, we measure sums of seven exclusive final states B -> X-d(s)gamma, where X-d(X-s) is a nonstrange (strange) charmless hadronic system in the mass range 0.6-1.8 GeV/c(2). After correcting for unmeasured decay modes in this mass range, we obtain a branching fraction for b -> d gamma of (7.2 +/- 2.7(stat)+/- 2.3(syst))x10(-6). Taking the ratio of X-d to X-s we find Gamma(b -> d gamma)/Gamma(b -> s gamma)=0.033 +/- 0.013(stat)+/- 0.009(syst), from which we determine |V-td/V-ts|=0.177 +/- 0.043.
Publisher version (URL): http://dx.doi.org/10.1103/PhysRevLett.102.161803
URI: http://hdl.handle.net/10261/21721
ISSN: 0031-9007
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Citation: Physical Review Letters 102: 161803 (2009)
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