We present an event generator for the process $pp\to \ell\nu_\ell\gamma$ at next-to-next-to-leading order (NNLO) in QCD and matched to PYTHIA8 parton shower. The calculation makes use of GENEVA framework, which combines a resummed obtained via Soft-Collinear Effective Theory (SCET) with fixed-order result. validate NNLO accuracy our results by comparing predictions inclusive quantities independ...

This article gives the perturbative NNLO results for the moments of the most commonly used event shape variables associated to three-jet events in electron-positron annihilation: Thrust, heavy jet mass, wide jet broadening, total jet broadening, C parameter and the Durham three-to-two jet transition variable.

Dissertori, G; Gehrmann-DeRidder, A; Gehrmann, T; Glover , E W N; Heinrich, G; Stenzel, H Dissertori, G; Gehrmann-DeRidder, A; Gehrmann, T; Glover , E W N; Heinrich, G; Stenzel, H (2008). First determination of the strong coupling constant using NNLO predictions for hadronic event shapes in e+e− annihilations. Journal of High Energy Physics, 2008(2):040. Postprint available at: http://www.zora....

We describe calculations of cc production to next-to-next-to-leading order (NNLO) and next-to-next-to-leading logarithm (NNLL) near threshold in pp and πp interactions. We study the relevance of these calculations for existing cc total cross section data by examining their sensitivity to partonic threshold kinematics, their convergence properties and scale dependence.

We present a subtraction scheme for computing jet cross sections in electronpositron annihilation at next-to-next-to-leading order accuracy in perturbative QCD. In this second part we deal with the regularization of the real-virtual contribution to the NNLO correction.

We present a calculation of soft-gluon corrections in FCNC top-quark production via anomalous t-q-g couplings. The soft anomalous dimension matrix is explicitly calculated at one-loop accuracy. This calculation allows threshold resummation at next-to-leadinglogarithm accuracy. We also derive expressions for the soft-gluon corrections at NLO and at NNLO.

A bstract In this work we perform the first ever calculation of jet event shapes at hadron colliders next-to-next-to leading order (NNLO) in QCD. The inclusion higher corrections removes shape difference observed between data and next-to-leading predictions. theory uncertainty NNLO is comparable to, or slightly larger than, existing measurements. Except for narrow kinematical ranges where all-o...

A bstract The theoretical description of photon production at particle colliders combines direct radiation and fragmentation processes, which can not be separated from each other for definitions isolation used in experimental measurements. these processes must account collinear parton-photon configurations, retaining the dependence on momentum fraction, includes parton-to-photon functions. We e...