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Open Access item Study of B -> X gamma decays and determination of vertical bar V-td/V-ts vertical bar

Authors:Babar Collaboration
López- March, Neus
Martínez-Vidal, Fernando
Milanés, Diego A.
Oyanguren, Arantza
Lees, J. P.
Sánchez, P. D.
Issue Date:10-Sep-2010
Publisher:American Physical Society
Citation:Physical Review - Section D - Particles and Fields 82 (5): 051101 (2010)
Abstract:Using a sample of 471 x 10(6) B (B) over bar events collected with the BABAR detector, we study the sum of seven exclusive final states B -> X-s(d)gamma, where X-s(d) is a strange (nonstrange) hadronic system with a mass of up to 2.0 GeV/c(2). After correcting for unobserved decay modes, we obtain a branching fraction for b -> d gamma of (9.2 +/- 2.0(stat) +/- 2.3(syst) x 10(-6) in this mass range, and a branching fraction for b -> s gamma of (23.0 +/- 0.8(stat) +/- 3.0(syst) x 3.0(syst) x 10(-5) in the same mass range. We find B(b -> d gamma)/B(b -> s gamma) = 0.040 +/- 0.009(stat) +/- 0.010(syst), from which we determine vertical bar Vtd/Vts vertical bar = 0.199 +/- 0.022(stat) +/- 0.024(syst) +/- 0.002(th).
Publisher version (URL):http://dx.doi.org/10.1103/PhysRevD.82.051101
URI:http://hdl.handle.net/10261/28434
ISSN:1550-7998
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Appears in Collections:(IFIC) Artículos

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