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T. Bergauer; I. Krätschmer; J. Wittmann; P. Van Mechelen; I. De Bruyn; W. Van Doninck; J. Zobec; H. Nogima; G. Sultanov; H. Liao; J. Pekkanen; P. Gras; L. Feld; M. Lipinski; D. Teyssier; H. Sert; U. Behrens; C. Kleinwort; M. Missiroli; V. Myronenko; R. Walsh; D. Troendle; S. Baur; A. Kyriakis; P. Kontaxakis; P. Major; R. Kumar; K. Ranjan; P. K. Rout; S. Sarkar; A. Gelmi; F. L. Navarria; L. Moroni; N. Cavallo; N. Bacchetta; M. Ressegotti; L. Fanò; M. A. Ciocci; E. Longo; F. Preiato; E. Monteil; H. S. Kim; K. Nam; A. Sanchez-Hernandez; M. Ahmad; P. Traczyk; P. Faccioli; A. Terkulov; M. C. Fouz; J. Fernandez Menendez; S. Folgueras; C. Prieels; M. Dobson; N. Dupont; D. Gigi; A. Tsirou; T. H. Doan; Sh. Jain; A. Polatoz; M. Yalvac; M. N. Agaras; A. Titterton; K. W. Bell; L. Corpe; D. Winterbottom; R. Bartek; D. Gastler; G. Landsberg; M. Chertok; G. Kole; M. Pieri; A. Dishaw; S. R. Wagner; K. Mcdermott; A. Apyan; G. B. Cerati; J. Duarte; V. D. Elvira; J. Hanlon; S. Hasegawa; L. Taylor; S. Tkaczyk; A. Carnes; A. Modak; G. Bauer; P. Harris; D. Hsu; M. Hu; C. Paus; R. Teixeira De Lima; Y. Musienko; J. Sun; Z. Chen; R. Demina; P. Tan; F. De Guio; S. Greene; A. Ledovskoy; S. Dasu; CMS Collaboration
The European physical journal. C, Particles and fields, 09/2019, Letnik: 79, Številka: 9Journal Article
Abstract A measurement for inclusive 2- and 3-jet events of the azimuthal correlation between the two jets with the largest transverse momenta, $$\varDelta \phi _{12}$$ Δϕ12 , is presented. The measurement considers events where the two leading jets are nearly collinear (“back-to-back”) in the transverse plane and is performed for several ranges of the leading jet transverse momentum. Proton-proton collision data collected with the CMS experiment at a center-of-mass energy of $$13\,\text {Te}\text {V} $$ 13Te and corresponding to an integrated luminosity of $$35.9{\,\text {fb}^{-1}} $$ 35.9fb-1 are used. Predictions based on calculations using matrix elements at leading-order and next-to-leading-order accuracy in perturbative quantum chromodynamics supplemented with leading-log parton showers and hadronization are generally in agreement with the measurements. Discrepancies between the measurement and theoretical predictions are as large as 15%, mainly in the region $$177^\circ< \varDelta \phi _{12} < 180^\circ $$ 177∘<Δϕ12<180∘ . The 2- and 3-jet measurements are not simultaneously described by any of models.
