We measure the particle-level forward-backward production asymmetry in $b\overline{b}$ pairs with masses ($m_{b\overline{b}}$) larger than $150\mathrm{GeV}/c^2$, using events with hadronic jets and employing jet charge to distinguish $b$ from $\overline{b}$. The measurement uses $9.5{\mathrm{fb}}^{-1}$ of $p\overline{p}$ collisions at a center-of-mass energy of 1.96 TeV recorded by the CDF II detector. The asymmetry as a function of $m_{b\overline{b}}$ is consistent with zero, as well as with the predictions of the standard model. The measurement disfavors a simple model including an axigluon with a mass of $200\mathrm{GeV}/c^2$, whereas a model containing a heavier $345\mathrm{GeV}/c^2$ axigluon is not excluded.

• Received 28 April 2015

DOI:https://doi.org/10.1103/PhysRevD.92.032006

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Published by the American Physical Society