Infrared subtraction at next-to-next-to-leading order for gluonic initial states

In this thesis we describe a procedure for isolating the infrared singularities present in gluonic scattering amplitudes at next-to-leading and next-to-next-to-leading order. We adopted the antenna subtraction framework which has been successfully applied to the calculation of NNLO corrections to th...

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Main Author:	Pires, Joao Nuno R. G.
Published:	Durham University 2010
Subjects:	539.6
Online Access:	http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.511265

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spelling	ndltd-bl.uk-oai-ethos.bl.uk-5112652015-03-20T04:48:47ZInfrared subtraction at next-to-next-to-leading order for gluonic initial statesPires, Joao Nuno R. G.2010In this thesis we describe a procedure for isolating the infrared singularities present in gluonic scattering amplitudes at next-to-leading and next-to-next-to-leading order. We adopted the antenna subtraction framework which has been successfully applied to the calculation of NNLO corrections to the 3-jet cross section and related event shape distributions in electron-positron annihilation. We consider processes with coloured particles in the initial state, and in particular two-jet production in hadron-hadron collisions at accelerators such as the Large Hadron Collider (LHC). We derive explicit formulae for subtracting the single and double unresolved contributions from the double radiation gluonic processes using antenna functions with initial state partons. We show numerically that the subtraction term effectively approximates the matrix element in the various single and double unresolved configurations.539.6Durham Universityhttp://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.511265http://etheses.dur.ac.uk/164/Electronic Thesis or Dissertation
collection	NDLTD
sources	NDLTD
topic	539.6
spellingShingle	539.6 Pires, Joao Nuno R. G. Infrared subtraction at next-to-next-to-leading order for gluonic initial states
description	In this thesis we describe a procedure for isolating the infrared singularities present in gluonic scattering amplitudes at next-to-leading and next-to-next-to-leading order. We adopted the antenna subtraction framework which has been successfully applied to the calculation of NNLO corrections to the 3-jet cross section and related event shape distributions in electron-positron annihilation. We consider processes with coloured particles in the initial state, and in particular two-jet production in hadron-hadron collisions at accelerators such as the Large Hadron Collider (LHC). We derive explicit formulae for subtracting the single and double unresolved contributions from the double radiation gluonic processes using antenna functions with initial state partons. We show numerically that the subtraction term effectively approximates the matrix element in the various single and double unresolved configurations.
author	Pires, Joao Nuno R. G.
author_facet	Pires, Joao Nuno R. G.
author_sort	Pires, Joao Nuno R. G.
title	Infrared subtraction at next-to-next-to-leading order for gluonic initial states
title_short	Infrared subtraction at next-to-next-to-leading order for gluonic initial states
title_full	Infrared subtraction at next-to-next-to-leading order for gluonic initial states
title_fullStr	Infrared subtraction at next-to-next-to-leading order for gluonic initial states
title_full_unstemmed	Infrared subtraction at next-to-next-to-leading order for gluonic initial states
title_sort	infrared subtraction at next-to-next-to-leading order for gluonic initial states
publisher	Durham University
publishDate	2010
url	http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.511265
work_keys_str_mv	AT piresjoaonunorg infraredsubtractionatnexttonexttoleadingorderforgluonicinitialstates
_version_	1716786681816809472

Infrared subtraction at next-to-next-to-leading order for gluonic initial states

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