Differential branching fraction and angular analysis of the decay B0→K *+μ -

The LHCb Collaboration

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Abstract

The angular distributions and the partial branching fraction of the decay B0→K *+μ - are studied by using an integrated luminosity of 0.37fb -1 of data collected with the LHCb detector. The forward-backward asymmetry of the muons, A FB, the fraction of longitudinal polarization, F L, and the partial branching fraction dB/dq2 are determined as a function of the dimuon invariant mass. The measurements are in good agreement with the standard model predictions and are the most precise to date. In the dimuon invariant mass squared range 1.00-6.00GeV2/c4, the results are A FB=-0.06-0.14+0.13±0.04, F L=0.55±0.10±0.03, and dB/dq2=(0.42±0. 06±0.03)×10 -7c4/GeV2. In each case, the first error is statistical and the second systematic.

Original languageEnglish
Article number181806
Number of pages8
JournalPhysical Review Letters
Volume108
Issue number18
DOIs
Publication statusPublished - 3 May 2012
Externally publishedYes

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