The transverse momentum spectrum of weak gauge bosons at N 3 LL + NNLO.

Autor: Bizoń W; 1Institut für Theoretische Teilchenphysik (TTP), KIT, 76128 Karlsruhe, Germany.; 2Institut für Kernphysik (IKP), KIT, 76344 Eggenstein-Leopoldshafen, Germany., Gehrmann-De Ridder A; 3Institute for Theoretical Physics, ETH, 8093 Zürich, Switzerland.; 4Department of Physics, University of Zürich, 8057 Zurich, Switzerland., Gehrmann T; 4Department of Physics, University of Zürich, 8057 Zurich, Switzerland., Glover N; 5Institute for Particle Physics Phenomenology, Durham University, Durham, DH1 3LE UK., Huss A; 6Theoretical Physics Department, CERN, 1211, Geneva 23, Switzerland., Monni PF; 6Theoretical Physics Department, CERN, 1211, Geneva 23, Switzerland., Re E; 6Theoretical Physics Department, CERN, 1211, Geneva 23, Switzerland.; 7LAPTh, Université Grenoble Alpes, Université Savoie Mont Blanc, CNRS, 74940 Annecy, France., Rottoli L; 8Dipartimento di Fisica G. Occhialini, U2, Università degli Studi di Milano-Bicocca, Piazza della Scienza, 3, 20126 Milan, Italy.; 9INFN, Sezione di Milano-Bicocca, 20126 Milan, Italy., Walker DM; 5Institute for Particle Physics Phenomenology, Durham University, Durham, DH1 3LE UK.
Jazyk: angličtina
Zdroj: The European physical journal. C, Particles and fields [Eur Phys J C Part Fields] 2019; Vol. 79 (10), pp. 868. Date of Electronic Publication: 2019 Oct 22.
DOI: 10.1140/epjc/s10052-019-7324-0
Abstrakt: We present accurate QCD predictions for the transverse momentum ( p ⊥ ) spectrum of electroweak gauge bosons at the LHC for 13 TeV collisions, based on a consistent combination of a NNLO calculation at large p ⊥ and N 3 LL resummation in the small p ⊥ limit. The inclusion of higher order corrections leads to substantial changes in the shape of the differential distributions, and the residual perturbative uncertainties are reduced to the few percent level across the whole transverse momentum spectrum. We examine the ratio of p ⊥ distributions in charged- and neutral-current Drell-Yan production, and study different prescriptions for the estimate of perturbative uncertainties that rely on different degrees of correlation between these processes. We observe an excellent stability of the ratios with respect to the perturbative order, indicating a strong correlation between the corresponding QCD corrections.
(© The Author(s) 2019.)
Databáze: MEDLINE
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