Cargando…

On Lepton Flavor Universality in Top Quark Decays

We propose a novel strategy to test lepton flavor universality (LFU) in top decays, applicable to top pair production at colliders. Our proposal exploits information in kinematic distributions and mostly hinges on data-driven techniques, thus having very little dependence on our theoretical understa...

Descripción completa

Detalles Bibliográficos
Autores principales: Kamenik, Jernej F., Katz, Andrey, Stolarski, Daniel
Lenguaje:eng
Publicado: 2018
Materias:
Acceso en línea:https://dx.doi.org/10.1007/JHEP01(2019)032
http://cds.cern.ch/record/2633489
_version_ 1780959637603876864
author Kamenik, Jernej F.
Katz, Andrey
Stolarski, Daniel
author_facet Kamenik, Jernej F.
Katz, Andrey
Stolarski, Daniel
author_sort Kamenik, Jernej F.
collection CERN
description We propose a novel strategy to test lepton flavor universality (LFU) in top decays, applicable to top pair production at colliders. Our proposal exploits information in kinematic distributions and mostly hinges on data-driven techniques, thus having very little dependence on our theoretical understanding of top pair production. Based on simplified models accommodating recent hints of LFU violation in charged current B meson decays, we show that existing LHC measurements already provide non-trivial information on the flavor structure and the mass scale of such new physics (NP). We also project that the measurements of LFU in top decays at the high-luminosity LHC could reach a precision at the percent level or below, improving the sensitivity to LFU violating NP in the top sector by more than an order of magnitude compared to existing approaches.
id cern-2633489
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2018
record_format invenio
spelling cern-26334892021-11-13T09:21:54Zdoi:10.1007/JHEP01(2019)032doi:10.1007/JHEP01(2019)032http://cds.cern.ch/record/2633489engKamenik, Jernej F.Katz, AndreyStolarski, DanielOn Lepton Flavor Universality in Top Quark Decayshep-exParticle Physics - Experimenthep-phParticle Physics - PhenomenologyWe propose a novel strategy to test lepton flavor universality (LFU) in top decays, applicable to top pair production at colliders. Our proposal exploits information in kinematic distributions and mostly hinges on data-driven techniques, thus having very little dependence on our theoretical understanding of top pair production. Based on simplified models accommodating recent hints of LFU violation in charged current B meson decays, we show that existing LHC measurements already provide non-trivial information on the flavor structure and the mass scale of such new physics (NP). We also project that the measurements of LFU in top decays at the high-luminosity LHC could reach a precision at the percent level or below, improving the sensitivity to LFU violating NP in the top sector by more than an order of magnitude compared to existing approaches.We propose a novel strategy to test lepton flavor universality (LFU) in top decays, applicable to top pair production at colliders. Our proposal exploits information in kinematic distributions and mostly hinges on data-driven techniques, thus having very little dependence on our theoretical understanding of top pair production. Based on simplified models accommodating recent hints of LFU violation in charged current B meson decays, we show that existing LHC measurements already provide non-trivial information on the flavor structure and the mass scale of such new physics (NP). We also project that the measurements of LFU in top decays at the high-luminosity LHC could reach a precision at the percent level or below, improving the sensitivity to LFU violating NP in the top sector by more than an order of magnitude compared to existing approaches.arXiv:1808.00964CERN-TH-2018-180oai:cds.cern.ch:26334892018-08-02
spellingShingle hep-ex
Particle Physics - Experiment
hep-ph
Particle Physics - Phenomenology
Kamenik, Jernej F.
Katz, Andrey
Stolarski, Daniel
On Lepton Flavor Universality in Top Quark Decays
title On Lepton Flavor Universality in Top Quark Decays
title_full On Lepton Flavor Universality in Top Quark Decays
title_fullStr On Lepton Flavor Universality in Top Quark Decays
title_full_unstemmed On Lepton Flavor Universality in Top Quark Decays
title_short On Lepton Flavor Universality in Top Quark Decays
title_sort on lepton flavor universality in top quark decays
topic hep-ex
Particle Physics - Experiment
hep-ph
Particle Physics - Phenomenology
url https://dx.doi.org/10.1007/JHEP01(2019)032
https://dx.doi.org/10.1007/JHEP01(2019)032
http://cds.cern.ch/record/2633489
work_keys_str_mv AT kamenikjernejf onleptonflavoruniversalityintopquarkdecays
AT katzandrey onleptonflavoruniversalityintopquarkdecays
AT stolarskidaniel onleptonflavoruniversalityintopquarkdecays