Utilize este identificador para referenciar este registo:
https://hdl.handle.net/1822/69397
Título: | Z boson production in Pb+Pb collisions at s<inf>NN</inf>=5.02 TeV measured by the ATLAS experiment |
Autor(es): | Onofre, A. Castro, Nuno Filipe ATLAS Collaboration |
Data: | 2020 |
Editora: | Elsevier |
Revista: | Physics Letters B |
Citação: | Aad, G., Abbott, B., Abbott, D. C., Abed Abud, A., Abeling, K., Abhayasinghe, D. K., . . . Zwalinski, L. (2020). Z boson production in Pb+Pb collisions at s<inf>NN</inf>=5.02 TeV measured by the ATLAS experiment. [Article]. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 802. doi: 10.1016/j.physletb.2020.135262 |
Resumo(s): | The production yield of Z bosons is measured in the electron and muon decay channels in Pb+Pb collisions at /S-NN = 5.02 TeV with the ATLAS detector. Data from the 2015 LHC run corresponding to an integrated luminosity of 0.49 nb(-1) are used for the analysis. The Z boson yield, normalised by the total number of minimum-bias events and the mean nuclear thickness function, is measured as a function of dilepton rapidity and event centrality. The measurements in Pb+Pb collisions are compared with similar measurements made in proton-proton collisions at the same centre-of-mass energy. The nuclear modification factor is found to be consistent with unity for all centrality intervals. The results are compared with theoretical predictions obtained at next-to-leading order using nucleon and nuclear parton distribution functions. The normalised Z boson yields in Pb+Pb collisions lie 1-3a above the predictions. The nuclear modification factor measured as a function of rapidity agrees with unity and is consistent with a next-to-leading-order QCD calculation including the isospin effect. (C) 2020 The Author(s). Published by Elsevier B.V. |
Tipo: | Artigo |
URI: | https://hdl.handle.net/1822/69397 |
DOI: | 10.1016/j.physletb.2020.135262 |
ISSN: | 0370-2693 |
e-ISSN: | 1873-2445 |
Versão da editora: | https://www.sciencedirect.com/science/article/pii/S0370269320300666 |
Arbitragem científica: | yes |
Acesso: | Acesso aberto |
Aparece nas coleções: | LIP - Artigos/papers |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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1-s2.0-S0370269320300666-main.pdf | 1,75 MB | Adobe PDF | Ver/Abrir |
Este trabalho está licenciado sob uma Licença Creative Commons