Measurement of the b -Quark Production Cross Section in 7 and 13 TeV pp Collisions

LHCb Collaboration, Robert Appleby, Igor Babuschkin, Roger Barlow, Thomas Bird, Alexander Bitadze, Silvia Borghi, Jolanta Brodzicka, Christopher Burr, Lorenzo Capriotti, Shun Chen, Stefano De Capua, Giulio Dujany, Marco Gersabeck, Jonathan Harrison, Christoph Hombach, Suzanne Klaver, George Lafferty, Kevin Maguire, Andrew McnabChristopher Parkes, Alex Pearce, Pablo Rodriguez Perez

    Research output: Contribution to journalArticlepeer-review

    Abstract

    Measurements of the cross section for producing b quarks in the reaction pp→b¯bX are reported in 7 and 13 TeV collisions at the LHC as a function of the pseudorapidity η in the range 2<η<5 covered by the acceptance of the LHCb experiment. The measurements are done using semileptonic decays of b-flavored hadrons decaying into a ground-state charmed hadron in association with a muon. The cross sections in the covered η range are 72.0±0.3±6.8 and 154.3±1.5±14.3  μb for 7 and 13 TeV. The ratio is 2.14±0.02±0.13, where the quoted uncertainties are statistical and systematic, respectively. The agreement with theoretical expectation is good at 7 TeV, but differs somewhat at 13 TeV. The measured ratio of cross sections is larger at lower η than the model prediction.
    Original languageEnglish
    Article number052002
    JournalPhysical Review Letters
    Volume118
    Issue number5
    DOIs
    Publication statusPublished - 3 Feb 2017

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