Determination of the Ratio of b-Quark Fragmentation Fractions f_{s}/f_{d} in pp Collisions at sqrt[s]=7  TeV with the ATLAS Detector

Physical Review Letters
G AadATLAS Collaboration

Abstract

With an integrated luminosity of 2.47  fb^{-1} recorded by the ATLAS experiment at the LHC, the exclusive decays B_{s}^{0}→J/ψϕ and B_{d}^{0}→J/ψK^{*0} of B mesons produced in pp collisions at sqrt[s]=7  TeV are used to determine the ratio of fragmentation fractions f_{s}/f_{d}. From the observed B_{s}^{0}→J/ψϕ and B_{d}^{0}→J/ψK^{*0} yields, the quantity (f_{s}/f_{d})[B(B_{s}^{0}→J/ψϕ)/B(B_{d}^{0}→J/ψK^{*0})] is measured to be 0.199±0.004(stat)±0.008(syst). Using a recent theory prediction for [B(B_{s}^{0}→J/ψϕ)/B(B_{d}^{0}→J/ψK^{*0})] yields (f_{s}/f_{d})=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.

References

May 1, 1995·Physical Review. D·E Braaten Tzu Chiang Yuan
Aug 29, 2014·Physical Review Letters·S ChatrchyanUNKNOWN CMS Collaboration

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Citations

Jan 1, 2016·The European Physical Journal. C, Particles and Fields·M AaboudUNKNOWN ATLAS Collaboration
Apr 14, 2020·Physical Review Letters·R AaijUNKNOWN LHCb Collaboration

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