Determination of the Ratio of b-quark fragmentation factors f[subscript s]/f[subscript d] in pp collisions at √s = 7 TeV with the ATLAS detector
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PhysRevLett.115.262001.pdf
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Author(s)
Taylor, Frank E.
Date Issued
December 2015
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
Aad, G., B. Abbott, J. Abdallah, O. Abdinov, R. Aben, M. Abolins, O. S. AbouZeid, et al. “Determination of the Ratio of b-Quark Fragmentation Fractions f[subscript s]/f[subscript d] in pp Collisions at √s = 7 TeV with the ATLAS Detector.” Physical Review Letters 115, no. 26 (December 30, 2015). © 2015 CERN, for the Atlas Collaboration
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Final published version
Abstract
With an integrated luminosity of 2.47 fb[superscript −1] recorded by the ATLAS experiment at the LHC, the exclusive decays B[0 over s] → J/ψϕ and B[0 over d] → J/ψK[superscript *0] of B mesons produced in pp collisions at √s = 7 TeV are used to determine the ratio of fragmentation fractions f[subscript s]/f[subscript d]. From the observed B[0 over s] → J/ψϕ and B[0 over d] → J/ψK[superscript *0] yields, the quantity (f[subscript s]/f[subscript d]) [B(B[0 over s] → J/ψϕ)/B(B[0 over d] → J/ψK[superscript *0])] is measured to be 0.199 ± 0.004(stat) ± 0.008(syst). Using a recent theory prediction for [B(B[0 over s] → J/ψϕ)/B(B[0 over d] → J/ψK[superscript *0])] yields (f[subscript s]/f[subscript 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.
MIT Department
Massachusetts Institute of Technology. Department of Physics
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DOI of Published Version
https://doi.org/10.1103/PhysRevLett.115.262001
