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Título: | Measurement of W± and Z-boson production cross sections in pp collisions at √s=13 TeV with the ATLAS detector | Autor: | Santos, S. P. Amor dos Carvalho, J. Fiolhais, M. C. N. Galhardo, B. Veloso, F. Wolters, H. ATLAS Collaboration |
Data: | 2016 | Editora: | Elsevier | Título da revista, periódico, livro ou evento: | Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics | Volume: | 759 | Resumo: | Measurements of the W±→ℓ±ν and Z→ℓ+ℓ− production cross sections (where ℓ±=e±,μ±) in proton–proton collisions at s=13 TeV are presented using data recorded by the ATLAS experiment at the Large Hadron Collider, corresponding to a total integrated luminosity of 81 pb−1. The total inclusive W±-boson production cross sections times the single-lepton-flavour branching ratios are σW tot=11.83±0.02 (stat)±0.32 (sys)±0.25 (lumi) nb and σW tot=8.79±0.02 (stat)±0.24 (sys)±0.18 (lumi) nb for W+ and W−, respectively. The total inclusive Z-boson production cross section times leptonic branching ratio, within the invariant mass window 66<mℓℓ<116 GeV, is σZ tot=1.981±0.007 (stat)±0.038 (sys)±0.042 (lumi) nb. The W+, W−, and Z-boson production cross sections and cross-section ratios within a fiducial region defined by the detector acceptance are also measured. The cross-section ratios benefit from significant cancellation of experimental uncertainties, resulting in σW fid/σW fid=1.295±0.003 (stat)±0.010 (sys) and σW fid/σZ fid=10.31±0.04 (stat)±0.20 (sys). Theoretical predictions, based on calculations accurate to next-to-next-to-leading order for quantum chromodynamics and to next-to-leading order for electroweak processes and which employ different parton distribution function sets, are compared to these measurements. | URI: | https://hdl.handle.net/10316/108746 | DOI: | 10.1016/j.physletb.2016.06.023 | Direitos: | openAccess |
Aparece nas coleções: | FCTUC Física - Artigos em Revistas Internacionais |
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Measurement of W± and Z-boson production cross sections in pp collisions at √s=13 TeV with the ATLAS detector.pdf | 1.74 MB | Adobe PDF | Ver/Abrir |
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