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  • PhysRevLett.115.262001

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Determination of the ratio of b-quark fragmentation fractions fs/fd in pp collisions at s√=7  TeV with the ATLAS detector

Research output: Contribution to journalJournal article

  • ATLAS Collaboration
Article number262001
<mark>Journal publication date</mark>30/12/2015
<mark>Journal</mark>Physical Review Letters
Issue number26
Number of pages18
<mark>Original language</mark>English


With an integrated luminosity of 2.47  fb−1 recorded by the ATLAS experiment at the LHC, the exclusive decays B0s→J/ψϕ and B0d→J/ψK*0 of B mesons produced in pp collisions at s√=7  TeV are used to determine the ratio of fragmentation fractions fs/fd. From the observed B0s→J/ψϕ and B0d→J/ψK*0 yields, the quantity (fs/fd)[B(B0s→J/ψϕ)/B(B0d→J/ψK*0)] is measured to be 0.199±0.004(stat)±0.008(syst). Using a recent theory prediction for [B(B0s→J/ψϕ)/B(B0d→J/ψK*0)] yields (fs/fd)=0.240±0.004(stat)±0.010(syst)±0.017(th). This result is based on a new approach that provides a significant improvement of the world average.