Electroweak Sudakov Corrections and the Top Quark Forward-Backward Asymmetry

The Standard Model (SM) prediction of the top quark forward backward asymmetry is shown to be slightly enhanced by a correction factor of 1.05 due to electroweak Sudakov (EWS) logarithms of the form (\alpha/sin^2 \theta_W)^n log^{m< 2n} (s/M_{W,Z}^2). The EWS effect on the dijet and t \bar{t} inv...

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Detalles Bibliográficos
Autores principales: Manohar, Aneesh V, Trott, Michael
Lenguaje:eng
Publicado: 2012
Materias:
Particle Physics - Phenomenology
Acceso en línea:https://dx.doi.org/10.1016/j.physletb.2012.04.013
http://cds.cern.ch/record/1417865
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author Manohar, Aneesh V
Trott, Michael
author_facet Manohar, Aneesh V
Trott, Michael
author_sort Manohar, Aneesh V
collection CERN
description The Standard Model (SM) prediction of the top quark forward backward asymmetry is shown to be slightly enhanced by a correction factor of 1.05 due to electroweak Sudakov (EWS) logarithms of the form (\alpha/sin^2 \theta_W)^n log^{m< 2n} (s/M_{W,Z}^2). The EWS effect on the dijet and t \bar{t} invariant mass spectra is significant, reducing the SM prediction by ~20, 10 % respectively for the highest invariant masses measured at the LHC, and changing the shape of the high-mass tail of the spectrum. These corrections significantly affect measurements of the top quark invariant mass spectrum and the search for an excess of events related to the top quark forward-backward asymmetry.
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institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2012
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spelling cern-14178652019-09-30T06:29:59Zdoi:10.1016/j.physletb.2012.04.013http://cds.cern.ch/record/1417865engManohar, Aneesh VTrott, MichaelElectroweak Sudakov Corrections and the Top Quark Forward-Backward AsymmetryParticle Physics - PhenomenologyThe Standard Model (SM) prediction of the top quark forward backward asymmetry is shown to be slightly enhanced by a correction factor of 1.05 due to electroweak Sudakov (EWS) logarithms of the form (\alpha/sin^2 \theta_W)^n log^{m< 2n} (s/M_{W,Z}^2). The EWS effect on the dijet and t \bar{t} invariant mass spectra is significant, reducing the SM prediction by ~20, 10 % respectively for the highest invariant masses measured at the LHC, and changing the shape of the high-mass tail of the spectrum. These corrections significantly affect measurements of the top quark invariant mass spectrum and the search for an excess of events related to the top quark forward-backward asymmetry.arXiv:1201.3926CERN-PH-TH-2012-035oai:cds.cern.ch:14178652012-01-20
spellingShingle Particle Physics - Phenomenology
Manohar, Aneesh V
Trott, Michael
Electroweak Sudakov Corrections and the Top Quark Forward-Backward Asymmetry
title Electroweak Sudakov Corrections and the Top Quark Forward-Backward Asymmetry
title_full Electroweak Sudakov Corrections and the Top Quark Forward-Backward Asymmetry
title_fullStr Electroweak Sudakov Corrections and the Top Quark Forward-Backward Asymmetry
title_full_unstemmed Electroweak Sudakov Corrections and the Top Quark Forward-Backward Asymmetry
title_short Electroweak Sudakov Corrections and the Top Quark Forward-Backward Asymmetry
title_sort electroweak sudakov corrections and the top quark forward-backward asymmetry
topic Particle Physics - Phenomenology
url https://dx.doi.org/10.1016/j.physletb.2012.04.013
http://cds.cern.ch/record/1417865
work_keys_str_mv AT manoharaneeshv electroweaksudakovcorrectionsandthetopquarkforwardbackwardasymmetry
AT trottmichael electroweaksudakovcorrectionsandthetopquarkforwardbackwardasymmetry

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