Würzburg 2018 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 46: Eingeladene Vorträge I

T 46.2: Eingeladener Vortrag

Mittwoch, 21. März 2018, 14:24–14:48, Z6 - HS 0.001

NNLO QCD in Higgs and vector-boson processes at the LHC — •Marius Wiesemann — CERN, Geneva, Switzerland

The LHC is entering its precision era. Without any clear signs of physics beyond the Standard Model in hadron collisions, the measurement of small deviations from Standard-Model predictions has become the best opportunity to disentangle new-physics phenomena. This requires, in particular, highly precise theoretical predictions of Standard-Model processes. In this talk, state-of-the-art radiative corrections at NNLO QCD are presented for several production processes involving Higgs and vector-boson final states. All possible leptonic decay channels of the vector bosons are included in the calculations, by consistently accounting for all resonant and non-resonant diagrams, off-shell effects and spin correlations. The underlying NNLO subtraction procedure is discussed in detail, and we introduce an automatic extrapolation procedure that allows us, for the first time, to control the systematic uncertainties of qT subtraction down to the few permille level (or better). Several direct applications of the results in LHC measurements are discussed.