Using a sample of 383×106 BB̄ events collected by the BABAR experiment, we measure sums of seven exclusive final states B→Xd(s)γ, where Xd(Xs) is a nonstrange (strange) charmless hadronic system in the mass range 0.6-1.8GeV/c2. After correcting for unmeasured decay modes in this mass range, we obtain a branching fraction for b→dγ of (7.2±2.7(stat)±2.3(syst))×10-6. Taking the ratio of Xd to Xs we find Γ(b→dγ)/Γ(b→sγ)=0.033±0. 013(stat)±0.009(syst), from which we determine |Vtd/Vts|=0.177±0. 043.

Aubert, B., Bona, M., Karyotakis, Y., Lees, J., Poireau, V., Prencipe, E., et al. (2009). Measurement of B→Xγ decays and determination of |Vtd/Vts|. PHYSICAL REVIEW LETTERS, 102(16) [10.1103/PhysRevLett.102.161803].

Measurement of B→Xγ decays and determination of |Vtd/Vts|

CARPINELLI, Massimo;
2009

Abstract

Using a sample of 383×106 BB̄ events collected by the BABAR experiment, we measure sums of seven exclusive final states B→Xd(s)γ, where Xd(Xs) is a nonstrange (strange) charmless hadronic system in the mass range 0.6-1.8GeV/c2. After correcting for unmeasured decay modes in this mass range, we obtain a branching fraction for b→dγ of (7.2±2.7(stat)±2.3(syst))×10-6. Taking the ratio of Xd to Xs we find Γ(b→dγ)/Γ(b→sγ)=0.033±0. 013(stat)±0.009(syst), from which we determine |Vtd/Vts|=0.177±0. 043.
Articolo in rivista - Articolo scientifico
BABAR experiment
English
2009
102
16
161803
none
Aubert, B., Bona, M., Karyotakis, Y., Lees, J., Poireau, V., Prencipe, E., et al. (2009). Measurement of B→Xγ decays and determination of |Vtd/Vts|. PHYSICAL REVIEW LETTERS, 102(16) [10.1103/PhysRevLett.102.161803].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/389449
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