Cargando…

Lepton Flavour Violating top decays at the LHC

We consider lepton flavour violating decays of the top quark, mediated by four-fermion operators. We compile constraints on a complete set of SU(3)*U(1)-invariant operators, arising from their loop contributions to rare decays and from HERA's single top search. The bounds on e-mu flavour change...

Descripción completa

Detalles Bibliográficos
Autores principales: Davidson, Sacha, Mangano, Michelangelo L., Perries, Stephane, Sordini, Viola
Lenguaje:eng
Publicado: 2015
Materias:
Acceso en línea:https://dx.doi.org/10.1140/epjc/s10052-015-3649-5
http://cds.cern.ch/record/2038308
_version_ 1780947701318287360
author Davidson, Sacha
Mangano, Michelangelo L.
Perries, Stephane
Sordini, Viola
author_facet Davidson, Sacha
Mangano, Michelangelo L.
Perries, Stephane
Sordini, Viola
author_sort Davidson, Sacha
collection CERN
description We consider lepton flavour violating decays of the top quark, mediated by four-fermion operators. We compile constraints on a complete set of SU(3)*U(1)-invariant operators, arising from their loop contributions to rare decays and from HERA's single top search. The bounds on e-mu flavour change are more restrictive than l-tau; nonetheless the top could decay to a jet $+ e \bar{\mu}$ with a branching ratio of order $10^{-3}$. We estimate that the currently available LHC data (20 inverse-fb at 8 TeV) could be sensitive to $BR(t \to e \bar{\mu}$+ jet) $ \sim 6\times 10^{-5}$, and extrapolate that 100 inverse-fb at 13 TeV could reach a sensitivity of $ \sim 1 \times 10^{-5}$.
id cern-2038308
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2015
record_format invenio
spelling cern-20383082022-08-10T13:07:16Zdoi:10.1140/epjc/s10052-015-3649-5http://cds.cern.ch/record/2038308engDavidson, SachaMangano, Michelangelo L.Perries, StephaneSordini, ViolaLepton Flavour Violating top decays at the LHCParticle Physics - PhenomenologyWe consider lepton flavour violating decays of the top quark, mediated by four-fermion operators. We compile constraints on a complete set of SU(3)*U(1)-invariant operators, arising from their loop contributions to rare decays and from HERA's single top search. The bounds on e-mu flavour change are more restrictive than l-tau; nonetheless the top could decay to a jet $+ e \bar{\mu}$ with a branching ratio of order $10^{-3}$. We estimate that the currently available LHC data (20 inverse-fb at 8 TeV) could be sensitive to $BR(t \to e \bar{\mu}$+ jet) $ \sim 6\times 10^{-5}$, and extrapolate that 100 inverse-fb at 13 TeV could reach a sensitivity of $ \sim 1 \times 10^{-5}$.We consider lepton-flavour violating decays of the top quark, mediated by 4-fermion operators. We compile constraints on a complete set of SU(3)  $\times $  U(1)-invariant operators, arising from their loop contributions to rare decays and from HERA’s single-top search. The bounds on e– $\mu $ flavour change are more restrictive than on $\ell $ – $\tau $ , nonetheless the top could decay to a jet ${+} e \bar{\mu }$ with a branching ratio of order $10^{-3}$ . We estimate that the currently available LHC data (20 fb$^{-1}$ at 8 TeV) could be sensitive to $BR(t \rightarrow e \bar{\mu }$ + jet) $ {\sim } 6\times 10^{-5}$ , and we extrapolate that 100 fb$^{-1}$ at 13 TeV could reach a sensitivity of ${\sim } 1 \times 10^{-5}$ .We consider lepton flavour violating decays of the top quark, mediated by four-fermion operators. We compile constraints on a complete set of SU(3)*U(1)-invariant operators, arising from their loop contributions to rare decays and from HERA's single top search. The bounds on e-mu flavour change are more restrictive than l-tau; nonetheless the top could decay to a jet $+ e \bar{\mu}$ with a branching ratio of order $10^{-3}$. We estimate that the currently available LHC data (20 inverse-fb at 8 TeV) could be sensitive to $BR(t \to e \bar{\mu}$+ jet) $ \sim 6\times 10^{-5}$, and extrapolate that 100 inverse-fb at 13 TeV could reach a sensitivity of $ \sim 1 \times 10^{-5}$.arXiv:1507.07163CERN-PH-TH-2015-145CERN-PH-TH-2015-145oai:cds.cern.ch:20383082015-07-25
spellingShingle Particle Physics - Phenomenology
Davidson, Sacha
Mangano, Michelangelo L.
Perries, Stephane
Sordini, Viola
Lepton Flavour Violating top decays at the LHC
title Lepton Flavour Violating top decays at the LHC
title_full Lepton Flavour Violating top decays at the LHC
title_fullStr Lepton Flavour Violating top decays at the LHC
title_full_unstemmed Lepton Flavour Violating top decays at the LHC
title_short Lepton Flavour Violating top decays at the LHC
title_sort lepton flavour violating top decays at the lhc
topic Particle Physics - Phenomenology
url https://dx.doi.org/10.1140/epjc/s10052-015-3649-5
http://cds.cern.ch/record/2038308
work_keys_str_mv AT davidsonsacha leptonflavourviolatingtopdecaysatthelhc
AT manganomichelangelol leptonflavourviolatingtopdecaysatthelhc
AT perriesstephane leptonflavourviolatingtopdecaysatthelhc
AT sordiniviola leptonflavourviolatingtopdecaysatthelhc