Measurement of b-hadron pair production with the ATLAS detector in proton-proton collisions at √s=8 TeV

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Measurement of b-hadron pair production with the ATLAS detector in proton-proton collisions at √s=8 TeV	1022 KB	Adobe Acrobat PDF	Read	Download
DOI Доступ к ресурсу на сайте издателя			10.1007/JHEP11(2017)062

Title: Measurement of b-hadron pair production with the ATLAS detector in proton-proton collisions at √s=8 TeV
Creator: Aad, G.
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Abbott, B.
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Chelkov, G. A.
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Khodinov, A.
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Vaniachine, A.
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Aaboud, M.
Date: 2017
DOI: 10.1007/JHEP11(2017)062
Description: A measurement of b-hadron pair production is presented, based on a data set corresponding to an integrated luminosity of 11.4 fb−1 of proton-proton collisions recorded at s√=8 TeV with the ATLAS detector at the LHC. Events are selected in which a b-hadron is reconstructed in a decay channel containing J/ψ → μμ, and a second b-hadron is reconstructed in a decay channel containing a muon. Results are presented in a fiducial volume defined by kinematic requirements on three muons based on those used in the analysis. The fiducial cross section is measured to be 17.7 ± 0.1(stat.) ± 2.0(syst.) nb. A number of normalised differential cross sections are also measured, and compared to predictions from the Pythia8, Herwig++, MadGraph5_aMC@NLO+Pythia8 and Sherpa event generators, providing new constraints on heavy flavour production.