Please use this identifier to cite or link to this item:
https://hdl.handle.net/2440/115095
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dc.contributor.author | Aaboud, M. | - |
dc.contributor.author | Aad, G. | - |
dc.contributor.author | Abbott, B. | - |
dc.contributor.author | Abdallah, J. | - |
dc.contributor.author | Abdinov, O. | - |
dc.contributor.author | Abeloos, B. | - |
dc.contributor.author | Abidi, S. | - |
dc.contributor.author | AbouZeid, O. | - |
dc.contributor.author | Abraham, N. | - |
dc.contributor.author | Abramowicz, H. | - |
dc.contributor.author | Abreu, H. | - |
dc.contributor.author | Abreu, R. | - |
dc.contributor.author | Abulaiti, Y. | - |
dc.contributor.author | Acharya, B. | - |
dc.contributor.author | Adachi, S. | - |
dc.contributor.author | Adamczyk, L. | - |
dc.contributor.author | Adams, D. | - |
dc.contributor.author | Adelman, J. | - |
dc.contributor.author | Adye, T. | - |
dc.contributor.author | Affolder, A. | - |
dc.contributor.author | et al. | - |
dc.date.issued | 2017 | - |
dc.identifier.citation | The Journal of High Energy Physics, 2017; 2017(2):117-1-117-54 | - |
dc.identifier.issn | 1126-6708 | - |
dc.identifier.issn | 1029-8479 | - |
dc.identifier.uri | http://hdl.handle.net/2440/115095 | - |
dc.description.abstract | Ratios of top-quark pair to Z-boson cross sections measured from proton-proton collisions at the LHC centre-of-mass energies of s√=13 TeV, 8 TeV, and 7 TeV are presented by the ATLAS Collaboration. Single ratios, at a given s√ for the two processes and at different s√ for each process, as well as double ratios of the two processes at different s√, are evaluated. The ratios are constructed using previously published ATLAS measurements of the tt¯ and Z-boson production cross sections, corrected to a common phase space where required, and a new analysis of Z → ℓ+ℓ− where ℓ = e, μ at s√=13 TeV performed with data collected in 2015 with an integrated luminosity of 3.2 fb−1. Correlations of systematic uncertainties are taken into account when evaluating the uncertainties in the ratios. The correlation model is also used to evaluate the combined cross section of the Z → e + e − and the Z → μ + μ − channels for each s√ value. The results are compared to calculations performed at next-to-next-to-leading-order accuracy using recent sets of parton distribution functions. The data demonstrate significant power to constrain the gluon distribution function for the Bjorken-x values near 0.1 and the light-quark sea for x < 0.02. | - |
dc.description.statementofresponsibility | M. Aaboud, G. Aad, B. Abbott, J. Abdallah ... Paul D. Jackson … Martin White … et al. (ATLAS Collaboration) | - |
dc.language.iso | en | - |
dc.publisher | Springer | - |
dc.rights | © The Author(s) 2017. This article is published under an open access license. Please check the 'Copyright Information' section for details of this license and what re-use is permitted. If your intended use exceeds what is permitted by the license or if you are unable to locate the licence and re-use information, please contact the Rights and Permissions team. | - |
dc.source.uri | http://dx.doi.org/10.1007/jhep02(2017)117 | - |
dc.title | Measurements of top-quark pair to Z-boson cross-section ratios at √s=13 , 8, 7 TeV with the ATLAS detector | - |
dc.title.alternative | Measurements of top-quark pair to Z-boson cross-section ratios at root s=13 , 8, 7 TeV with the ATLAS detector | - |
dc.type | Journal article | - |
dc.identifier.doi | 10.1007/JHEP02(2017)117 | - |
pubs.publication-status | Published | - |
Appears in Collections: | Aurora harvest 8 Physics publications |
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hdl_115095.pdf | Published version | 2.28 MB | Adobe PDF | View/Open |
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