We compute the one-loop electroweak Sudakov corrections to the production process Z(νnu¯) + n jets, with n = 1,2,3, in p p collisions at the LHC. It represents the main irreducible background to new physics searches at the energy frontier. The results are obtained at the leading and next-to-leading logarithmic accuracy by implementing the general algorithm of Denner-Pozzorini in the event generator for multiparton processes ALPGEN. For the standard selection cuts used by ATLAS and CMS collaborations, we show that the Sudakov corrections to the relevant observables can grow up to -40% at s√ = 14 TeV. We also include the contribution due to undetected real radiation of massive gauge bosons, to show to what extent the partial cancellation with the large negative virtual corrections takes place in realistic event selections.

Electroweak Sudakov Corrections to New Physics Searches at the LHC

MORETTI, Mauro;
2013

Abstract

We compute the one-loop electroweak Sudakov corrections to the production process Z(νnu¯) + n jets, with n = 1,2,3, in p p collisions at the LHC. It represents the main irreducible background to new physics searches at the energy frontier. The results are obtained at the leading and next-to-leading logarithmic accuracy by implementing the general algorithm of Denner-Pozzorini in the event generator for multiparton processes ALPGEN. For the standard selection cuts used by ATLAS and CMS collaborations, we show that the Sudakov corrections to the relevant observables can grow up to -40% at s√ = 14 TeV. We also include the contribution due to undetected real radiation of massive gauge bosons, to show to what extent the partial cancellation with the large negative virtual corrections takes place in realistic event selections.
2013
Mauro, Chiesa; Guido, Montagna; Luca, Barzè; Moretti, Mauro; Oreste, Nicrosini; Fulvio, Piccinini; Francesco, Tramontano
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11392/1973812
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