Utilize este identificador para referenciar este registo:
https://hdl.handle.net/1822/43757
Título: | A new method to distinguish hadronically decaying boosted Z bosons from W bosons using the ATLAS detector |
Autor(es): | Onofre, A. Castro, Nuno Filipe Silva Fernandes ATLAS Collaboration |
Data: | 2016 |
Editora: | Springer Verlag |
Revista: | The European Physical Journal C: Particles and Fields |
Citação: | Aad, G., Abbott, B., Abdallah, J., Abdinov, O., Aben, R., Zwalinski, L.,… Collaboration, A. (2016). A new method to distinguish hadronically decaying boosted Z bosons from W bosons using the ATLAS detector. [Article]. European Physical Journal C, 76(5). doi: 10.1140/epjc/s10052-016-4065-1 |
Resumo(s): | The distribution of particles inside hadronic jets produced in the decay of boosted W and Z bosons can be used to discriminate such jets from the continuum background. Given that a jet has been identified as likely resulting from the hadronic decay of a boosted W or Z boson, this paper presents a technique for further differentiating Z bosons from W bosons. The variables used are jet mass, jet charge, and a b-tagging discriminant. A likelihood tagger is constructed from these variables and tested in the simulation of W′→WZ for bosons in the transverse momentum range 200 GeV <pT< 400 GeV in √s=8 TeV pp collisions with the ATLAS detector at the LHC. For Z-boson tagging efficiencies of ϵZ=90, 50, and 10%, one can achieve W+-boson tagging rejection factors (1/ϵW+) of 1.7, 8.3 and 1000, respectively. It is not possible to measure these efficiencies in the data due to the lack of a pure sample of high pT, hadronically decaying Z bosons. However, the modelling of the tagger inputs for boosted W bosons is studied in data using a tˉt-enriched sample of events in 20.3 fb−1 of data at √s=8 TeV. The inputs are well modelled within uncertainties, which builds confidence in the expected tagger performance. |
Tipo: | Artigo |
URI: | https://hdl.handle.net/1822/43757 |
DOI: | 10.1140/epjc/s10052-016-4065-1 |
ISSN: | 1434-6044 |
e-ISSN: | 1434-6052 |
Arbitragem científica: | yes |
Acesso: | Acesso aberto |
Aparece nas coleções: | LIP - Artigos/papers |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
---|---|---|---|---|
art_3A10.1140_2Fepjc_2Fs10052-016-4065-1.pdf | 2,57 MB | Adobe PDF | Ver/Abrir |