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Si us plau utilitzeu sempre aquest identificador per citar o enllaçar aquest document: https://hdl.handle.net/2445/132909
First Observation of Top Quark Production in the Forward Region
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Top 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.
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BADALOV, Alexey, CALVO GÓMEZ, Míriam, GARRIDO BELTRÁN, Lluís, GASCÓN FORA, David, GRACIANI DÍAZ, Ricardo, GRAUGÉS POUS, Eugeni, MARIN BENITO, Carla, PICATOSTE OLLOQUI, Eduardo, RIVES MOLINA, Vicente josé, RUIZ, Hugo (ruiz pérez), VILASIS-CARDONA, Xavier, LHCb Collaboration. First Observation of Top Quark Production in the Forward Region. _Physical Review Letters_. 2015. Vol. 115, núm. 11, pàgs. 112001. [consulta: 24 de gener de 2026]. ISSN: 0031-9007. [Disponible a: https://hdl.handle.net/2445/132909]