Observation of Top Quark Production in the Forward Region at LHCb

Abstract

Forward top production is observed, in the $\mu +b$ final state, with the 3 fb${}^{-1}$ Run I dataset collected by the LHCb detector. The combined cross-section for $t\bar{t}$ and single top production at $\sqrt{s}=7$ TeV and $\sqrt{s}=8$ TeV is measured, for muons from the W boson with $p_{\mathrm{T}}>25$ GeV in the pseudo-rapidity range 2.0$<\eta <$4.5 and with a b-tagged jet with 50$<p_{\mathrm{T}}<100$ GeV in the pseudorapidity range 2.2$<\eta <$4.2. The production cross-sections are found to be in agreement with NLO predictions.

To appear in Proceedings of LHCP 2015