Status of QCD

In this talk, I review recent developments in perturbative QCD and their applications to collider physics.Comment: Plenary talk presented at XVIII International Workshop on Deep-Inelastic Scattering and Related Subjects, DIS 2010, April 2010, Firenze, Italy; v2: typos corrected, references adde

NNLO Antenna Subtraction with One Hadronic Initial State

In this talk we present the extension of the antenna subtraction method to include initial states containing one hadron at NNLO. We sketch the requirements for the different necessary subtraction terms, and we explain how the antenna functions are integrated over the appropriate phase space by reducing the integrals to a small set of master integrals. Where applicable, our results for the integrated antennae were cross-checked against the known NNLO coefficient functions for deep inelastic scattering processes.Comment: 6 pages, 1 figure. Talk given at RADCOR 2009 - 9th International Symposium on Radiative Corrections (Applications of Quantum Field Theory to Phenomenology) October 25 - 30 200

Automation of the Dipole Subtraction Method in MadGraph/MadEvent

We present the implementation of the dipole subtraction formalism for the real radiation contributions to any next-to-leading order QCD process in the MadGraph/MadEvent framework. Both massless and massive dipoles are considered. Starting from a specific (n+1)-particle process the package provides a Fortran code for all possible dipoles to all Born processes that constitute the subtraction term to the (n+1)-particle process. The output files are given in the usual "MadGraph StandAlone" style using helicity amplitudes.Comment: 14 pages, 4 figure

Hadronic final states in DIS with Sherpa

We present an extension of the multi-purpose Monte-Carlo event generator Sherpa for processes in deeply inelastic lepton-nucleon scattering. Hadronic final states in this kinematical setting are characterised by the presence of multiple kinematical scales, which were up to now accounted for only by specific resummations in individual kinematical regions. An extension of a known method for merging truncated parton showers with higher-order tree-level matrix elements allows to obtain predictions which are reliable in all kinematical limits.Comment: 5 pages, 3 figures; Contribution to the XVIII International Workshop on Deep-Inelastic Scattering and Related Subjects, April 19-23, 2010, Firenze, Ital

Integrated dipoles with MadDipole in the MadGraph framework

Heading towards a full automation of next-to-leading order (NLO) QCD corrections, one important ingredient is the analytical integration over the one-particle phase space of the unresolved particle that is necessary when adding the subtraction terms to the virtual corrections. We present the implementation of these integrated dipoles in the MadGraph framework. The result is a package that allows an automated calculation for the NLO real emission parts of an arbitrary process.Comment: 22 pages, 1 figure. Published version: few reference updates and a couple of minor corrections to the tex