منابع مشابه
Subtraction terms at NNLO
Perturbative calculations at next-to-next-to-leading order for multi-particle final states require a method to cancel infrared singularities. I discuss the subtraction method at NNLO. As a concrete example I consider the leading-colour contributions to e+e− → 2 jets. This is the simplest example which exhibits all essential features. For this example, explicit subtraction terms are given, which...
متن کاملSubtraction at NNLO
We propose a framework for the implementation of a subtraction formalism at NNLO in QCD, based on an observableand process-independent cancellation of infrared singularities. As a first simple application, we present the calculation of the contribution to the ee dijet cross section proportional to CFTR.
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The computation of exclusive QCD jet observables at higher orders requires a method for the subtraction of infrared singular configurations arising from multiple radiation of real partons. We present a subtraction scheme relevant for NNLO perturbative calculations in e+e− → jets. The building blocks of the scheme are antenna functions derived from the matrix elements for tree-level 1 → 3 and 1 ...
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The various motivations for improving the perturbative prediction to next-to-next-to-leading order (NNLO) for basic scattering processes in proton-(anti)proton, electron-proton and electron-positron scattering are discussed in detail. Recent progress in the field of next-to-next-to-leading order calculations is reviewed.
متن کاملNNLO 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 integ...
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ژورنال
عنوان ژورنال: Nuclear Physics B - Proceedings Supplements
سال: 2006
ISSN: 0920-5632
DOI: 10.1016/j.nuclphysbps.2006.03.007