# 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.
Document type :
Journal articles

http://hal.in2p3.fr/in2p3-01159296
Contributor : Sabine Starita <>
Submitted on : Wednesday, June 3, 2015 - 10:12:17 AM
Last modification on : Monday, March 29, 2021 - 3:22:46 PM

### Citation

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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