Mainz 2014 – scientific programme

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T: Fachverband Teilchenphysik

T 86: Elektroschwache Physik (Theorie) 1

T 86.1: Talk

Wednesday, March 26, 2014, 16:45–17:00, P103

Gluon-induced Higgs-strahlung at next-to-leading order QCD — •Lukas Altenkamp¹, Stefan Dittmaier¹, Heidi Rzehak^1,3, Robert V. Harlander², and Tom J.E. Zirke² — ¹Physikalisches Institut, Albert-Ludwigs-Universität Freiburg, D-79104 Freiburg, Germany — ²Fachbereich C, Bergische Universität Wuppertal, 42097 Wuppertal, Germany — ³TH Division, Physics Department, CERN, CH-1211 Geneva 23, Switzerland

The Higgs + Z-boson production is an important process for measuring the Higgs-boson properties. At NNLO, the production via two gluons becomes possible, and with ∼5% at 14 TeV the contribution is significant and the corresponding scale uncertainty dominates the total theoretical uncertainty. I will present the QCD corrections to this sub-process in the approximation of a large top-quark mass M_T, in which the occurring two-loop integrals are calculable by an expansion in powers of M_T. To cope with the infrared singularities, the Catani-Seymour dipole subtraction algorithm has been used, leading to several separately finite contributions which have been integrated numerically in 4 dimensions. Our results show a correction of roughly 100% and have been obtained by two independent calculations which are in full agreement.