학술논문
Azimuthal correlations of high transverse momentum jets at next-to-leading order in the parton branching method
Document Type
Working Paper
Author
Abdulhamid, M. I.; Al-Mashad, M. A.; Martinez, A. Bermudez; Bonomelli, G.; Bubanja, I.; Crnkovic, N.; Colombina, F.; D'Anzi, B.; Cerci, S.; Davydov, M.; Banos, L. I. Estevez; Forzano, N.; Hautmann, F.; Jung, H.; Kim, S.; Quiros, A. Leon; Martins, D. E.; Mendizabal, M.; Figueroa, K. Moral; Prestel, S.; Monfared, S. Taheri; Süslü, C.; Cerci, D. Sunar; van Kampen, A. M.; Van Mechelen, P.; Verbytskyi, A.; Wang, Q.; Yang, H.; Zhou, Y.
Source
Subject
Language
Abstract
The azimuthal correlation, $\Delta \phi_{12}$, of high transverse momentum jets in pp collisions at $\sqrt{s}=13$ 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 $\Delta \phi_{12}$ is observed. In the back-to-back region of $\Delta \phi_{12} \to \pi$, 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 $\alpha_s$, 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 $\Delta \phi_{12}$ measurements are also compared with predictions using MCatNLO together PYTHIA8, illustrating the importance of details of the parton shower evolution.
Comment: 15 pages, 8 Figures
Comment: 15 pages, 8 Figures