https://doi.org/10.1140/epjc/s10052-022-09997-1
Regular Article - Theoretical Physics
Azimuthal correlations of high transverse momentum jets at next-to-leading order in the parton branching method
1
Department of Physics, Tanta University, Tanta, Egypt
2
Faculty of Science, Center for High Energy Physics (CHEP-FU), Fayoum University, Faiyum, Egypt
3
Deutsches Elektronen-Synchrotron DESY, Hamburg, Germany
4
Università degli Studi Milano-Bicocca, Milan, Italy
5
Interuniversity Institute for High Energies (IIHE), Université libre de Bruxelles, Brussels, Belgium
6
Faculty of Natural Sciences and Mathematics, University of Montenegro, Podgorica, Montenegro
7
Ruđer Bošković Institute, Zagreb, Croatia
8
National Institute for Nuclear Physics INFN and University of Bari, Bari, Italy
9
Adiyaman University, Adiyaman, Turkey
10
Moscow State University, Moscow, Russia
11
Elementary Particle Physics, University of Antwerp, Antwerp, Belgium
12
University of Oxford, Oxford, UK
13
Universidad Autónoma de Madrid, Madrid, Spain
14
Universidade Federal de Pelotas, Pelotas, Brazil
15
University of Edinburgh, Edinburgh, UK
16
Department of Astronomy and Theoretical Physics, Lund University, Lund, Sweden
17
Department of Physics, Ihsan Dogramaci Bilkent University, Ankara, Turkey
18
Max-Planck Institut für Physik, Munich, Germany
19
School of Physics, Peking University, Beijing, China
20
University of Cambridge, Cambridge, UK
Received:
22
December
2021
Accepted:
4
January
2022
Published online:
13
January
2022
The azimuthal correlation, 
, of high transverse momentum jets in pp collisions at 
TeV is studied by applying PB-TMD distributions to NLO calculations via MCatNLO together with the PB-TMD parton shower. A very good description of the cross section as a function of is observed. In the back-to-back region of 
, a very good agreement is observed with the PB-TMD Set 2 distributions while significant deviations are obtained with the PB-TMD Set 1 distributions. Set 1 uses the evolution scale while Set 2 uses transverse momentum as an argument in 
, and the above observation therefore confirms the importance of an appropriate soft-gluon coupling in angular ordered parton evolution. The total uncertainties of the predictions are dominated by the scale uncertainties of the matrix element, while the uncertainties coming from the PB-TMDs and the corresponding PB-TMD shower are very small. The measurements are also compared with predictions using MCatNLO together Pythia8, illustrating the importance of details of the parton shower evolution.
© The Author(s) 2022
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