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Helicity fractions of W bosons from top quark decays at NNLO in QCD

Decay rates of unpolarized top quarks into longitudinally and transversally polarized W bosons are calculated to second order in the strong coupling constant alpha_s. Including the finite bottom quark mass and electroweak effects, the Standard Model predictions for the W boson helicity fractions are...

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Detalles Bibliográficos
Autores principales: Czarnecki, Andrzej, Korner, Jurgen G., Piclum, Jan H.
Lenguaje:eng
Publicado: 2010
Materias:
Acceso en línea:https://dx.doi.org/10.1103/PhysRevD.81.111503
http://cds.cern.ch/record/1265878
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author Czarnecki, Andrzej
Korner, Jurgen G.
Piclum, Jan H.
author_facet Czarnecki, Andrzej
Korner, Jurgen G.
Piclum, Jan H.
author_sort Czarnecki, Andrzej
collection CERN
description Decay rates of unpolarized top quarks into longitudinally and transversally polarized W bosons are calculated to second order in the strong coupling constant alpha_s. Including the finite bottom quark mass and electroweak effects, the Standard Model predictions for the W boson helicity fractions are F_L=0.687(5), F_+=0.0017(1), and F_-=0.311(5).
id cern-1265878
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2010
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spelling cern-12658782023-03-12T05:00:30Zdoi:10.1103/PhysRevD.81.111503http://cds.cern.ch/record/1265878engCzarnecki, AndrzejKorner, Jurgen G.Piclum, Jan H.Helicity fractions of W bosons from top quark decays at NNLO in QCDParticle Physics - PhenomenologyDecay rates of unpolarized top quarks into longitudinally and transversally polarized W bosons are calculated to second order in the strong coupling constant alpha_s. Including the finite bottom quark mass and electroweak effects, the Standard Model predictions for the W boson helicity fractions are F_L=0.687(5), F_+=0.0017(1), and F_-=0.311(5).Decay rates of unpolarized top quarks into longitudinally and transversally polarized W bosons are calculated to second order in the strong coupling constant alpha_s. Including the finite bottom quark mass and electroweak effects, the Standard Model predictions for the W boson helicity fractions are F_L=0.687(5), F_+=0.0017(1), and F_-=0.311(5).arXiv:1005.2625ALBERTA-THY-05-10CERN-PH-TH-2010-098MZ-TH-10-13ALBERTA-THY-05-10CERN-PH-TH-2010-098MZ-TH-10-13oai:cds.cern.ch:12658782010-05-18
spellingShingle Particle Physics - Phenomenology
Czarnecki, Andrzej
Korner, Jurgen G.
Piclum, Jan H.
Helicity fractions of W bosons from top quark decays at NNLO in QCD
title Helicity fractions of W bosons from top quark decays at NNLO in QCD
title_full Helicity fractions of W bosons from top quark decays at NNLO in QCD
title_fullStr Helicity fractions of W bosons from top quark decays at NNLO in QCD
title_full_unstemmed Helicity fractions of W bosons from top quark decays at NNLO in QCD
title_short Helicity fractions of W bosons from top quark decays at NNLO in QCD
title_sort helicity fractions of w bosons from top quark decays at nnlo in qcd
topic Particle Physics - Phenomenology
url https://dx.doi.org/10.1103/PhysRevD.81.111503
http://cds.cern.ch/record/1265878
work_keys_str_mv AT czarneckiandrzej helicityfractionsofwbosonsfromtopquarkdecaysatnnloinqcd
AT kornerjurgeng helicityfractionsofwbosonsfromtopquarkdecaysatnnloinqcd
AT piclumjanh helicityfractionsofwbosonsfromtopquarkdecaysatnnloinqcd