Cargando…
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...
Autores principales: | , , |
---|---|
Lenguaje: | eng |
Publicado: |
2010
|
Materias: | |
Acceso en línea: | https://dx.doi.org/10.1103/PhysRevD.81.111503 http://cds.cern.ch/record/1265878 |
_version_ | 1780920083315425280 |
---|---|
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 |
record_format | invenio |
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 |