Azimuthal separation in nearly back-to-back jet topologies in inclusive 2-and 3-jet events in pp collisions at root s=13TeV

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The CMS Collaboration , Sirunyan , A M , Eerola , P , Kirschenmann , H , Pekkanen , J , Voutilainen , M , Havukainen , J , Heikkilä , J K , Jarvinen , T , Karimaki , V , Kinnunen , R , Lampen , T , Lassila-Perini , K , Laurila , S , Linden , T , Luukka , P , Maenpaa , T , Siikonen , H , Tuominen , E , Tuominiemi , J & Tuuva , T 2019 , ' Azimuthal separation in nearly back-to-back jet topologies in inclusive 2-and 3-jet events in pp collisions at root s=13TeV ' , European Physical Journal C. Particles and Fields , vol. 79 , no. 9 , 773 . https://doi.org/10.1140/epjc/s10052-019-7276-4

Title: Azimuthal separation in nearly back-to-back jet topologies in inclusive 2-and 3-jet events in pp collisions at root s=13TeV
Author: Sirunyan, A. M.; Van Remortel, N.; Liu, Z.; Wang, C.; Wang, Z.; Zhang, H.; Zhao, J.; Wang, Y.; Raidal, M.; Eerola, P.; Kirschenmann, H.; Pekkanen, J.; Voutilainen, M.; Havukainen, J.; Heikkilä, J. K.; Jarvinen, T.; Karimaki, V.; Kinnunen, R.; Lampen, T.; Lassila-Perini, K.; Laurila, S.; Lehti, S.; Linden, T.; Luukka, P.; Maenpaa, T.; Siikonen, H.; Tuominen, E.; Tuominiemi, J.; Bloch, D.; Schroeder, M.; Weber, M.; Czellar, S.; Kaur, S.; Kumar, A.; Bhattacharya, S.; Banerjee, S.; Bhattacharya, S.; Das, P.; Sharma, S.; Rossi, A.; Rossi, A.; Lee, H.; Kim, J. H.; Ahmad, A.; Chen, Y.; Orsini, L.; Taylor, D.; Wang, Z.; Zhang, F.; Wei, H.; Sharma, V.; Zhang, Z.; Wagner, S. R.; Banerjee, S.; Liu, M.; Liu, T.; Wu, W.; Wang, J.; Wang, S.; Rodriguez, J. L.; Wang, H.; Sharma, V.; Chen, X.; Wu, Z.; Zhang, J.; Moeller, A.; Wang, Q.; Shin, Y. H.; Azzolini, V.; Hu, M.; Lee, Y. -J.; Wang, J.; Wang, T. W.; Evans, A.; Hansen, P.; Bhattacharya, S.; Li, W.; Smith, G.; Wolf, M.; Li, W.; Han, J.; Wang, Z.; Li, H.; Wang, Y.; Savin, A.; Smith, W. H.; Tuuva, T.
Contributor: University of Helsinki, Universiteit Antwerpen
University of Helsinki, Inst High Energy Phys, Chinese Academy of Sciences, Institute of High Energy Physics, CAS
University of Helsinki, NICPB, National Institute of Chemical Physics & Biophysics (NICPB)
University of Helsinki, Department of Physics
University of Helsinki, Helsinki Institute of Physics
University of Helsinki, Helsinki Institute of Physics
University of Helsinki, Particle Physics and Astrophysics
University of Helsinki, Helsinki Institute of Physics
University of Helsinki, Helsinki Institute of Physics
University of Helsinki, Department of Physics
University of Helsinki, Department of Physics
University of Helsinki, Helsinki Institute of Physics
University of Helsinki, Helsinki Institute of Physics
University of Helsinki, Helsinki Institute of Physics
University of Helsinki, Helsinki Institute of Physics
University of Helsinki, Helsinki Institute of Physics
University of Helsinki, Helsinki Institute of Physics
University of Helsinki, Helsinki Institute of Physics
University of Helsinki, Helsinki Institute of Physics
University of Helsinki, Helsinki Institute of Physics
University of Helsinki, Eija Tuominen / Principal Investigator
University of Helsinki, Department of Physics
University of Helsinki, MTA ATOMKI, Hungarian Academy of Sciences, Inst Nucl Res
University of Helsinki, MIT, Massachusetts Institute of Technology (MIT), MKI
Date: 2019-09
Number of pages: 24
Belongs to series: European Physical Journal C. Particles and Fields
ISSN: 1434-6044
URI: http://hdl.handle.net/10138/311581
Abstract: A measurement for inclusive 2- and 3-jet events of the azimuthal correlation between the two jets with the largest transverse momenta, Delta phi(12), 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 TeV and corresponding to an integrated luminosity of 35.9 fb(-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 themeasurements. Discrepancies between the measurement and theoretical predictions are as large as 15%, mainly in the region 177 degrees <Delta phi(12) <180 degrees. The 2- and 3-jet measurements are not simultaneously described by any of models.
Subject: 114 Physical sciences
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