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 (Institut de Ciències del Cosmos (ICCUB)) Articles publicats en revistes (Enginyeria Electrònica i Biomèdica) |
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