Badalov, AlexeyCalvo Gómez, MíriamGarrido Beltrán, LluísGascón Fora, DavidGraciani Díaz, RicardoGraugés Pous, EugeniMarin Benito, CarlaPicatoste Olloqui, EduardoRives Molina, Vicente JoséRuiz, Hugo (Ruiz Pérez)Vilasis-Cardona, XavierLHCb Collaboration2019-05-092019-05-092015-09-080031-9007https://hdl.handle.net/2445/132909Top quark production in the forward region in proton-proton collisions is observed for the first time. The W + b final state with W → μ ν is reconstructed using muons with a transverse momentum, p T , larger than 25 GeV in the pseudorapidity range 2.0 < η < 4.5 . The b jets are required to have 50 < p T < 100     GeV and 2.2 < η < 4.2 , while the transverse component of the sum of the muon and b -jet momenta must satisfy p T > 20     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 ) [ 7     TeV ] = 239 ± 53 ( stat ) ± 33 ( syst ) ± 24 ( theory )     fb , σ ( top ) [ 8     TeV ] = 289 ± 43 ( stat ) ± 40 ( syst ) ± 29 ( theory )     fb . These results, along with the observed differential yields and charge asymmetries, are in agreement with next-to-leading order standard model predictions.10 p.application/pdfengcc by (c) CERN; LHCb Collaboration, 2015http://creativecommons.org/licenses/by/3.0/es/Física de partículesExperimentsParticle physicsExperimentsinfo:eu-repo/semantics/article6567702019-05-09info:eu-repo/semantics/openAccess