Please use this identifier to cite or link to this item: http://hdl.handle.net/2445/132909
Title: First Observation of Top Quark Production in the Forward Region
Author: 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
Keywords: Física de partícules
Experiments
Particle physics
Experiments
Issue Date: 8-Sep-2015
Publisher: American Physical Society
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 → 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.
Note: Reproducció del document publicat a: https://doi.org/10.1103/PhysRevLett.115.112001
It is part of: Physical Review Letters, 2015, vol. 115, num. 11, p. 112001
URI: http://hdl.handle.net/2445/132909
Related resource: https://doi.org/10.1103/PhysRevLett.115.112001
ISSN: 0031-9007
Appears in Collections:Articles publicats en revistes (Física Quàntica i Astrofísica)
Articles publicats en revistes (Electrònica)

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