Browsing by Author "Al-Mashad, M.A."

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    Azimuthal correlations of high transverse momentum jets at next-to-leading order in the parton branching method
    (Springer Science and Business Media Deutschland GmbH, 2022-01-13) Abdulhamid, M.I.; Al-Mashad, M.A.; Martinez, A. Bermudez; Bonomelli, G.; Bubanja, I.; Crnković, N.; Colombina, F.; D’Anzi, B.; Cerci, S.; Davydov, M.; Banos, L. I. Estevez; Forzano, N.; Hautmann, F.; Jung, H.; Kim, S.; Quirós, A. León; 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.
    The azimuthal correlation, Δ ϕ12, 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 Δ ϕ12 is observed. In the back-to-back region of Δ ϕ12→ 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 αs, 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 Δ ϕ12 measurements are also compared with predictions using MCatNLO together Pythia8, illustrating the importance of details of the parton shower evolution. © 2022, The Author(s).