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T: Fachverband Teilchenphysik

T 17: Elektroschwache Physik (Theorie)

T 17.6: Vortrag

Montag, 9. März 2015, 15:15–15:30, K.11.20 (K5)

Bounding the Higgs width at LHC - Two-loop virtual corrections to Z boson pair production — •Sebastian Kirchner — Institute for Theoretical Particle Physics and Cosmology, RWTH Aachen University

Obtaining accurate theoretical predictions for the Higgs boson width became recently important for LHC studies. Using a simple cut-and-count method, first introduced by Caola and Melnikov, it is possible to bound the Higgs boson width by measuring the on-shell and off-shell cross section for Higgs boson production and the underlying background processes. We compute the two-loop virtual corrections to Z boson production via the heavy top loop as the last missing piece for a complete analysis at NNLO. We employ both large-mass expansions and differential equations. First results will be presented.