Measurements of top-quark pair to Z-boson cross-section ratios at √s=13 , 8, 7 TeV with the ATLAS detector

M Aaboud; G Aad; B Abbott; J Abdallah; O Abdinov; B Abeloos; SH Abidi; OS AbouZeid; NL Abraham; H Abramowicz; H Abreu; R Abreu; Y Abulaiti; BS Acharya; S Adachi; L Adamczyk; DL Adams; J Adelman; T Adye; AA Affolder; T Agatonovic-Jovin; C Agheorghiesei; JA Aguilar-Saavedra; SP Ahlen; F Ahmadov; G Aielli; S Akatsuka; H Akerstedt; TPA Åkesson; AV Akimov; GL Alberghi; J Albert; MJ Alconada Verzini; M Aleksa; IN Aleksandrov; C Alexa; G Alexander; T Alexopoulos; M Alhroob; B Ali; M Aliev; G Alimonti; J Alison; SP Alkire; BMM Allbrooke; BW Allen; PP Allport; A Aloisio; A Alonso; F Alonso; C Alpigiani; AA Alshehri; M Alstaty; B Alvarez Gonzalez; D Álvarez Piqueras; MG Alviggi; BT Amadio; Y Amaral Coutinho; C Amelung; D Amidei; SP Amor Dos Santos; A Amorim; S Amoroso; G Amundsen; C Anastopoulos; LS Ancu; N Andari; T Andeen; CF Anders; JK Anders; KJ Anderson; A Andreazza; V Andrei; S Angelidakis; I Angelozzi; A Angerami; F Anghinolfi; AV Anisenkov; N Anjos; A Annovi; C Antel; M Antonelli; A Antonov; DJ Antrim; F Anulli; M Aoki; L Aperio Bella; G Arabidze; Y Arai; JP Araque; V Araujo Ferraz; ATH Arce; FA Arduh; JF Arguin; S Argyropoulos; M Arik; AJ Armbruster; LJ Armitage; O Arnaez

Journal article

Measurements of top-quark pair to Z-boson cross-section ratios at √s=13 , 8, 7 TeV with the ATLAS detector

M Aaboud, G Aad, B Abbott, J Abdallah, O Abdinov, B Abeloos, SH Abidi, OS AbouZeid, NL Abraham, H Abramowicz, H Abreu, R Abreu, Y Abulaiti, BS Acharya, S Adachi, L Adamczyk, DL Adams, J Adelman, T Adye, AA Affolder Show all

Journal of High Energy Physics | SPRINGER | Published : 2017

DOI: 10.1007/JHEP02(2017)117

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 ..

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University of Melbourne Researchers

Elisabetta Barberio Author

Federico Scutti Author

G. N. Taylor Author

Phillip Urquijo Author

Grants

Awarded by National Science Foundation

Funding Acknowledgements

We acknowledge the support of ANPCyT, Argentina; YerPHI, Armenia; ARC, Australia; BMWFW and FWF, Austria; ANAS, Azerbaijan; SSTC, Belarus; CNPq and FAPESP, Brazil; NSERC, NRC and CFI, Canada; CERN; CONICYT, Chile; CAS, MOST and NSFC, China; COLCIENCIAS, Colombia; MSMT CR, MPO CR and VSC CR, Czech Republic; DNRF and DNSRC, Denmark; IN2P3-CNRS, CEA-DSM/IRFU, France; GNSF, Georgia; BMBF, HGF, and MPG, Germany; GSRT, Greece; RGC, Hong Kong SAR, China; ISF, I-CORE and Benoziyo Center, Israel; INFN, Italy; MEXT and JSPS, Japan; CNRST, Morocco; FOM and NWO, Netherlands; RCN, Norway; MNiSW and NCN, Poland; FCT, Portugal; MNE/IFA, Romania; MES of Russia and NRC KI, Russian Federation; JINR; MESTD, Serbia; MSSR, Slovakia; ARRS and MIZS, Slovenia; DST/NRF, South Africa; MINECO, Spain; SRC and Wallenberg Foundation, Sweden; SERI, SNSF and Cantons of Bern and Geneva, Switzerland; MOST, Taiwan; TAEK, Turkey; STFC, United Kingdom; DOE and NSF, United States of America. In addition, individual groups and members have received support from BCKDF, the Canada Council, CANARIE, CRC, Compute Canada, FQRNT, and the Ontario Innovation Trust, Canada; EPLANET, ERC, FP7, Horizon 2020 and Marie Sk lodowska-Curie Actions, European Union; Investissements d'Avenir Labex and Idex, ANR, Region Auvergne and Fondation Partager le Savoir, France; DFG and AvH Foundation, Germany; Herakleitos, Thales and Aristeia programmes cofinanced by EU-ESF and the Greek NSRF; BSF, GIF and Minerva, Israel; BRF, Norway; Generalitat de Catalunya, Generalitat Valenciana, Spain; the Royal Society and Leverhulme Trust, United Kingdom.