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Title

Measurement of the top quark mass in the tt¯→ lepton+jets channel from s√=8 TeV ATLAS data and combination with previous results

AuthorsÁlvarez Piqueras, D. ; Aparisi, Pozo, J.A.; Bailey, A.J.; Barranco, Laura; Cabrera, Susana ; Castillo, F.L.; Castillo Mª Victoria; Cerda Alberich, L.; Costa, María José ; Escobar, Carlos ; Estrada, Oscar; Ferrer, Antonio ; Fiorini, L. ; Fullana, Esteban ; Fuster, Juan ; García García, Carmen ; García Navarro, José Enrique ; González de la Hoz, Santiago ; Higón, Emilio ; Jimenez Pena, Javier; Lacasta Llácer, Carlos ; Lozano Bahilo, José J.; Madaffari, Daniele; Mamuzic, Judita; Martí García, Salvador ; Melini, Davide; Miñano Moya, M.; Mitsou, Vasiliki A. ; Rodriguez Bosca, S.; Rodriguez Rodriguez, D.; Ruiz Martínez, Arantxa ; Salt, José ; Santra, A.; Soldevila, Urmila ; Sánchez Martínez, Javier ; Valero, Alberto ; Valls Ferrer, Juan Antonio ; Vos, Marcel ; ATLAS Collaboration
Issue DateApr-2019
PublisherSpringer Nature
CitationEuropean Physical Journal C - Particles and Fields 79: 290 (2019)
AbstractThe top quark mass is measured using a template method in the tt¯→lepton+jets channel (lepton is e or μ) using ATLAS data recorded in 2012 at the LHC. The data were taken at a proton–proton centre-of-mass energy of s√=8 TeV and correspond to an integrated luminosity of 20.2 fb−1. The tt¯→lepton+jets channel is characterized by the presence of a charged lepton, a neutrino and four jets, two of which originate from bottom quarks (b). Exploiting a three-dimensional template technique, the top quark mass is determined together with a global jet energy scale factor and a relative b-to-light-jet energy scale factor. The mass of the top quark is measured to be mtop=172.08±0.39(stat)±0.82(syst) GeV. A combination with previous ATLAS mtop measurements gives mtop=172.69±0.25(stat)±0.41(syst) GeV.
Publisher version (URL)https://doi.org/10.1140/epjc/s10052-019-6757-9
URIhttp://hdl.handle.net/10261/194063
DOI10.1140/epjc/s10052-019-6757-9
ISSN1434-6044
E-ISSN1434-6052
Appears in Collections:(IFIC) Artículos
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