Measurement of the Forward-Backward Asymmetry in the Production of B± Mesons in p¯p Collisions at √s = 1.96  TeV

D0 Collaboration, M. R. J. Williams

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We present a measurement of the forward-backward asymmetry in the production of B± mesons, AFB(B±), using B± J/ψK± decays in 10.4  fb−1 of p¯p collisions at √s = 1.96  TeV collected by the D0 experiment during Run II of the Tevatron collider. A nonzero asymmetry would indicate a preference for a particular flavor, i.e., b quark or ¯b antiquark, to be produced in the direction of the proton beam. We extract AFB(B±) from a maximum likelihood fit to the difference between the numbers of forward- and backward-produced B± mesons. We measure an asymmetry consistent with zero: AFB(B±) = [−0.24±0.41  (stat)±0.19  (syst)]%.
© 2015 American Physical Society
Original languageEnglish
Article number051803
JournalPhysical Review Letters
Issue number5
Early online date4 Feb 2015
Publication statusPublished - 6 Feb 2015


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