Naslov
Azimuthal correlations of high transverse momentum jets at next-to-leading order in the parton branching method
(Azimuthal correlations of high transverse momentum jets at next-to-leading order in the parton branching methodAzimuthal correlations of high transverse momentum jets at next-to-leading order in the parton branching method)

Autori
Abdulhamid, M., I ; Al-Mashad, M. A. ; Martinez, A. Bermudez ; Bonomelli, G. ; Bubanja, I ; Crnković, Nikola ; 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 ; Suslu, C. ; Cerci, D. Sunar ; van Kampen, A. M. ; Van Mechelen, P. ; Verbytskyi, A. ; Wang, Q. ; Yang, H. ; Zhou, Y.

Izvornik
European physical journal C : particles and fields (1434-6044) 82 (2021), 36; 36, 10

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
Azimuthal correlations ; high transverse momentum jets ; parton branching ; NLO

Sažetak
The azimuthal correlation, Δϕ_12, of high transverse momentum jets in pp collisions at √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 Δϕ_12 is observed. In the back-to-back region of Δϕ_12→π, 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 α_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 Δϕ_12 measurements are also compared with predictions using MCatNLO together PYTHIA8, illustrating the importance of details of the parton shower evolution.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

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