Corrections to the Production of Two Lepton Pairs via Vector-Boson Fusion at the LHC

por Lucia Hosekova (Instituto de Física Corpuscular, IFIC)

viernes 7 sept. 2012 12:00 → 13:00 Europe/Madrid

Sala Seminarios IFIC (Edf. Institutos de Investigación)

Higgs production via gauge boson fusion, due to its unique signature formed by two tagging jets in the forward and backward region of the detector, is one of the most important channels for discovery of the Higgs boson at the LHC and for exploring its properties. As most of the irreducible background originates from other gauge boson fusion processes sharing the same kinematical characteristics, it is desirable to analyze and understand these processes with accuracy that goes beyond the leading order. I present a method for calculating the next-to-leading-order QCD corrections to both resonant and non-resonant contributions to the vector boson fusion processes, implementing the Weyl van der Waerden helicity formalism and polarization sums to divide complex Feynman diagrams into blocks and present results for a class of processes associated with production of two W+. In comparison to the leading order, the results of this calculation show a significant reduction in the estimated uncertainties caused by higher perturbative orders.

Diapositivas transpis936.pdf