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	Measurement of double-differential cross sections for top quark pair production in pp collisions at root s=8 tev and impact on parton distribution functions
	Sirunyan, A. M.1; Tumasyan, A.1; Adam, W.2; Asilar, E.2; Bergauer, T.2; Brandstetter, J.2; Brondolin, E.2; Dragicevic, M.2; Eroe, J.2; Flechl, M.2
刊名	European physical journal c
	2017-07-11
卷号	77期号:7页码:45
ISSN号	1434-6044
DOI	10.1140/epjc/s10052-017-4984-5
通讯作者	Sirunyan, a. m.()
英文摘要	Normalized double-differential cross sections for top quark pair (t (t) over bar) production are measured in pp collisions at a centre-of-mass energy of 8 tev with the cms experiment at the lhc. the analyzed data correspond to an integrated luminosity of 19.7 fb(-1). the measurement is performed in the dilepton e(+/-)mu(+/-) final state. the tt cross section is determined as a function of various pairs of observables characterizing the kinematics of the top quark and tt system. the data are compared to calculations using perturbative quantum chromodynamics at next-to-leading and approximate next-to-next-to-leading orders. they are also compared to predictions of monte carlo event generators that complement fixed-order computations with parton showers, hadronization, and multiple-parton interactions. overall agreement is observed with the predictions, which is improved when the latest global sets of proton parton distribution functions are used. the inclusion of the measured tt cross sections in a fit of parametrized parton distribution functions is shown to have significant impact on the gluon distribution.
WOS关键词	3-LOOP SPLITTING FUNCTIONS ; LEADING ORDER ; LHC ; QCD ; SCATTERING ; DENSITIES ; EVOLUTION ; ERA
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:000405244200001
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2177246
专题	高能物理研究所
通讯作者	Sirunyan, A. M.
作者单位	1.Yerevan Phys Inst, Yerevan, Armenia 2.Inst Hochenergiephys, Vienna, Austria 3.Inst Nucl Problems, Minsk, Byelarus 4.Natl Ctr Particle & High Energy Phys, Minsk, Byelarus 5.Univ Antwerp, Antwerp, Belgium 6.Vrije Univ Brussel, Brussels, Belgium 7.Univ Libre Bruxelles, Brussels, Belgium 8.Univ Ghent, Ghent, Belgium 9.Catholic Univ Louvain, Louvain La Neuve, Belgium 10.Univ Mons, Mons, Belgium
推荐引用方式 GB/T 7714	Sirunyan, A. M.,Tumasyan, A.,Adam, W.,et al. Measurement of double-differential cross sections for top quark pair production in pp collisions at root s=8 tev and impact on parton distribution functions[J]. European physical journal c,2017,77(7):45.
APA	Sirunyan, A. M..,Tumasyan, A..,Adam, W..,Asilar, E..,Bergauer, T..,...&Ahmad, M..(2017).Measurement of double-differential cross sections for top quark pair production in pp collisions at root s=8 tev and impact on parton distribution functions.European physical journal c,77(7),45.
MLA	Sirunyan, A. M.,et al."Measurement of double-differential cross sections for top quark pair production in pp collisions at root s=8 tev and impact on parton distribution functions".European physical journal c 77.7(2017):45.

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