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

par Abdulhamid, M.I.;Al-Mashad, M.A.;Martinez, Amy Bermudez;Bonomelli, G.;Bubanja, Itana ;Crnković, N.;Colombina, F.;D’Anzi, B.;Cerci, S.;Davydov, M.;Banos, Luis Ignacio Estevez;Forzano, N.;Hautmann, Francesco;Jung, Hannes;Kim, S.;Quirós, León A.L.;Martins, D.E.;Mendizabal, Mikel;Figueroa, Moral K.M.;Prestel, Stefan;Monfared, Sara Taheri;Süslü, C.;Cerci, Deniz Sunar;van Kampen, A.M.;Van Mechelen, Pierre;Verbytskyi, Andrii;Wang, Q;Yang, Heng;Zhou, Y.
Référence European Physical Journal C. Particles and Fields, 82, 1, 36
Publication Publié, 2022-01

Article révisé par les pairs

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Résumé :

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.