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https://hdl.handle.net/1822/39953
Título: | Measurement of the top-quark mass in the fully hadronic decay channel from ATLAS data at s√=7 TeV |
Autor(es): | Onofre, A. Castro, Nuno Filipe Silva Fernandes ATLAS Collaboration |
Palavras-chave: | Electroweak interaction QCD Top physics Experimental results ATLAS Fully hadronic LHC Proton–proton collisions Top quark Top-quark mass |
Data: | 2015 |
Editora: | Springer Verlag |
Revista: | The European Physical Journal C: Particles and Fields |
Citação: | Aad, G., Abbott, B., Abdallah, J., Khalek, S. A., Abdinov, O., Aben, R., . . . Collaboration, A. (2015). Measurement of the top-quark mass in the fully hadronic decay channel from ATLAS data at root s=7 TeV. European Physical Journal C, 75(4). doi: 10.1140/epjc/s10052-015-3373-1 |
Resumo(s): | The mass of the top quark is measured in a data set corresponding to 4.6 fb−1 of proton--proton collisions with centre-of-mass energy s√=7 TeV collected by the ATLAS detector at the LHC. Events consistent with hadronic decays of top--antitop quark pairs with at least six jets in the final state are selected. The substantial background from multijet production is modelled with data-driven methods that utilise the number of identified b-quark jets and the transverse momentum of the sixth leading jet, which have minimal correlation. The top-quark mass is obtained from template fits to the ratio of three-jet to dijet mass. The three-jet mass is calculated from the three jets of a top-quark decay. Using these three jets the dijet mass is obtained from the two jets of the W boson decay. The top-quark mass obtained from this fit is thus less sensitive to the uncertainty in the energy measurement of the jets. A binned likelihood fit yields a top-quark mass of mt = 175.1 ± 1.4 (stat.) ± 1.2 (syst.) GeV. |
Tipo: | Artigo |
URI: | https://hdl.handle.net/1822/39953 |
DOI: | 10.1140/epjc/s10052-015-3373-1 |
ISSN: | 1434-6044 1434-6052 |
Arbitragem científica: | yes |
Acesso: | Acesso aberto |
Aparece nas coleções: | LIP - Artigos/papers |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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ATLAS-20140903.pdf | 2,14 MB | Adobe PDF | Ver/Abrir |