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	Measurements of top-quark pair to z-boson cross-section ratios at root s=13, 8, 7 tev with the atlas detector
	Aaboud, M.194,195; Aad, G.124,125; Abbott, B.156; Abdallah, J.11; Abdinov, O.15; Abeloos, B.160; Abidi, S. H.226; AbouZeid, O. S.198; Abraham, N. L.215; Abramowicz, H.219
刊名	Journal of high energy physics
	2017-02-23
期号	2页码:1-54
关键词	Hadron-hadron scattering (experiments)
ISSN号	1029-8479
DOI	10.1007/jhep02(2017)117
通讯作者	Aaboud, m.()
英文摘要	Ratios of top-quark pair to z-boson cross sections measured from proton-proton-collisions at the lhc centre-of-mass energies of root s = 13 tev, 8 tev, and 7 tev are presented by the atlas collaboration. single ratios, at a given root s for the two processes and at different root s , for each process, as well as double ratios of the two processes at different root s , are evaluated. the ratios are constructed using previously published atlas measurements of the t (t) over bar 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, mu at root 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 -> mu (+) mu (-) channels for each 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.
WOS关键词	PARTON DISTRIBUTIONS ; HADRON COLLIDERS ; QCD ANALYSIS ; PLUS PLUS ; RESUMMATION ; DECAY ; LHC
WOS研究方向	Physics
WOS类目	Physics, Particles & Fields
语种	英语
出版者	SPRINGER
WOS记录号	WOS:000395022700001
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2176716
专题	高能物理研究所
通讯作者	Aaboud, M.
作者单位	1.Univ Adelaide, Dept Phys, Adelaide, SA, Australia 2.SUNY Albany, Dept Phys, Albany, NY 12222 USA 3.Univ Alberta, Dept Phys, Edmonton, AB, Canada 4.Ankara Univ, Dept Phys, Ankara, Turkey 5.Istanbul Aydin Univ, Istanbul, Turkey 6.TOBB Univ Econ & Technol, Div Phys, Ankara, Turkey 7.CNRS, IN2P3, LAPP, Annecy Le Vieux, France 8.Univ Savoie Mt Blanc, Annecy Le Vieux, France 9.Argonne Natl Lab, Div High Energy Phys, Argonne, IL 60439 USA 10.Univ Arizona, Dept Phys, Tucson, AZ 85721 USA
推荐引用方式 GB/T 7714	Aaboud, M.,Aad, G.,Abbott, B.,et al. Measurements of top-quark pair to z-boson cross-section ratios at root s=13, 8, 7 tev with the atlas detector[J]. Journal of high energy physics,2017(2):1-54.
APA	Aaboud, M..,Aad, G..,Abbott, B..,Abdallah, J..,Abdinov, O..,...&Hanagaki, K..(2017).Measurements of top-quark pair to z-boson cross-section ratios at root s=13, 8, 7 tev with the atlas detector.Journal of high energy physics(2),1-54.
MLA	Aaboud, M.,et al."Measurements of top-quark pair to z-boson cross-section ratios at root s=13, 8, 7 tev with the atlas detector".Journal of high energy physics .2(2017):1-54.

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