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First observation of top quark production in the forward region

Abstract : Top quark production in the forward region in proton-proton collisions is observed for the first time. The W+b final state with W→μν is reconstructed using muons with a transverse momentum, pT, larger than 25 GeV in the pseudorapidity range 2.0<η<4.5. The b jets are required to have 5020 GeV. The results are based on data corresponding to integrated luminosities of 1.0 and 2.0 fb−1 collected at center-of-mass energies of 7 and 8 TeV by LHCb. The inclusive top quark production cross-sections in the fiducial region are σ(top)[7TeV]=239±53(stat)±38(syst)fb and σ(top)[8TeV]=289±43(stat)±46(syst)fb. These results, along with the observed differential yields and charge asymmetries, are in agreement with next-to-leading order Standard Model predictions.
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Submitted on : Wednesday, June 3, 2015 - 10:12:17 AM
Last modification on : Friday, November 26, 2021 - 11:58:02 AM

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R. Aaij, Y. Amhis, S. Barsuk, M. Borsato, O. Kochebina, et al.. First observation of top quark production in the forward region. Physical Review Letters, American Physical Society, 2015, 115, pp.112001. ⟨10.1103/PhysRevLett.115.112001⟩. ⟨in2p3-01159296⟩



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