Publication: Measurement of the forward-backward asymmetry in low-mass bottom-quark pairs produced in proton-antiproton collisions
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2016
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American Physical Society (APS)
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ATLAS Collaboration. 2016. Measurement of the Forward-Backward Asymmetry in Low-Mass Bottom-Quark Pairs Produced in Proton-Antiproton Collisions. Phys. Rev. D 93, no. 11. doi:10.1103/physrevd.93.112003.
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Abstract
We report a measurement of the forward-backward asymmetry, AFB, in b¯b pairs produced in proton-antiproton collisions and identified by muons from semileptonic b-hadron decays. The event sample is collected at a center-of-mass energy of √s =1.96 TeV with the CDF II detector and corresponds to 6.9 fb−1 of integrated luminosity. We obtain an integrated asymmetry of AFB(b¯b)= (1.2 ± 0.7)% at the particle level for b-quark pairs with invariant mass, mb¯b, down to 40 GeV/c2 and measure the dependence of AFB(b¯b) on mb¯b. The results are compatible with expectations from the standard model.
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