Measurement of the ratio of branching fractions B(B0→K *0γ)/B(Bs0→φγ)

The LHCb Collaboration

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The ratio of branching fractions of the radiative B decays B0→K *0γ and B0s→φγ has been measured using 0.37fb -1 of pp collisions at a center of mass energy of √s=7TeV, collected by the LHCb experiment. The value obtained is B(B0→K *0γ)B(B0s→φγ)=1.12±0.08- 0.04-0.08+0.06+0.09, where the first uncertainty is statistical, the second systematic, and the third is associated with the ratio of fragmentation fractions f s/f d. Using the world average for B(B0→K *0γ)=(4.33±0.15)×10 -5, the branching fraction B(B0s→φγ) is measured to be (3.9±0.5)×10 -5, which is the most precise measurement to date.

Original languageEnglish
Article number112013
Number of pages8
JournalPhysical Review D
Issue number11
Publication statusPublished - 25 Jun 2012
Externally publishedYes

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