A fresh look at the nested soft-collinear subtraction scheme: NNLO QCD corrections to N-gluon final states in q anti-q annihilation
Articolo
Data di Pubblicazione:
2024
Citazione:
A fresh look at the nested soft-collinear subtraction scheme: NNLO QCD corrections to N-gluon final states in q anti-q annihilation / F. Devoto, K. Melnikov, R. Röntsch, C. Signorile-Signorile, D.M. Tagliabue. - In: INTERNATIONAL JOURNAL OF HIGH ENERGY PHYSICS. - ISSN 2376-7448. - 2024:(2024 Feb 02), pp. 16.1-16.107. [10.1007/JHEP02(2024)016]
Abstract:
We describe how the nested soft-collinear subtraction scheme [1] can be used
to compute the next-to-next-to-leading order (NNLO) QCD corrections to the production
of an arbitrary number of gluonic jets in hadron collisions. We show that the infrared
subtraction terms can be combined into recurring structures that in many cases are simple
iterations of those terms known from next-to-leading order. The way that these recurring
structures are identified and computed is fairly general, and can be applied to any partonic
process. As an example, we explicitly demonstrate the cancellation of all singularities in the
fully-differential cross section for the q¯q → X + Ng process at NNLO in QCD. The finite
remainder of the NNLO QCD contribution, which arises upon cancellation of all ϵ-poles,
is expressed via relatively simple formulas, which can be implemented in a numerical code
in a straightforward way. Our approach can be extended to describe arbitrary processes
at NNLO in QCD; the largest remaining challenge at this point is the combinatorics of
quark and gluon collinear limits.
Tipologia IRIS:
01 - Articolo su periodico
Keywords:
Higher-Order Perturbative Calculations, Renormalization and Regularization, Specific QCD Phenomenology;
Elenco autori:
F. Devoto, K. Melnikov, R. Röntsch, C. Signorile-Signorile, D.M. Tagliabue
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