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Measurement of dijet azimuthal decorrelation in pp collisions at root s=8 TeV
CMS Collaboration
2016
发表期刊EUROPEAN PHYSICAL JOURNAL C
卷号76期号:10
摘要A measurement of the decorrelation of azimuthal angles between the two jets with the largest transverse momenta is presented for seven regions of leading jet transverse momentum up to 2.2. The analysis is based on the proton-proton collision data collected with the CMS experiment at a centre-of-mass energy of 8 corresponding to an integrated luminosity of 19.7. The dijet azimuthal decorrelation is caused by the radiation of additional jets and probes the dynamics of multijet production. The results are compared to fixed-order predictions of perturbative quantum chromodynamics (QCD), and to simulations using Monte Carlo event generators that include parton showers, hadronization, and multiparton interactions. Event generators with only two outgoing high transverse momentum partons fail to describe the measurement, even when supplemented with next-to-leading-order QCD corrections and parton showers. Much better agreement is achieved when at least three outgoing partons are complemented through either next-to-leading-order predictions or parton showers. This observation emphasizes the need to improve predictions for multijet production.
文章类型Article
DOI10.1140/epjc/s10052-016-4346-8
语种英语
WOS记录号WOS:000388965500001
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文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/260753
专题粒子天体物理中心
作者单位中国科学院高能物理研究所
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CMS Collaboration. Measurement of dijet azimuthal decorrelation in pp collisions at root s=8 TeV[J]. EUROPEAN PHYSICAL JOURNAL C,2016,76(10).
APA CMS Collaboration.(2016).Measurement of dijet azimuthal decorrelation in pp collisions at root s=8 TeV.EUROPEAN PHYSICAL JOURNAL C,76(10).
MLA CMS Collaboration."Measurement of dijet azimuthal decorrelation in pp collisions at root s=8 TeV".EUROPEAN PHYSICAL JOURNAL C 76.10(2016).
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