||Measurement of the forward-backward asymmetry in low-mass bottom-quark pairs produced in proton-antiproton collisions
CDF Collaboration ,
Hara, K. ,
Kim, S. H. ,
Sato, K. ,
Ukegawa, F.Takeuch, Y.
, p.112003 , 2016-06 , American Physical Society
We report a measurement of the forward-backward asymmetry, AFB, in bb¯ 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(bb¯)=(1.2±0.7)% at the particle level for b-quark pairs with invariant mass, mbb¯, down to 40 GeV/c2 and measure the dependence of AFB(bb¯) on mbb¯. The results are compatible with expectations from the standard model.