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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...
Autores principales: | , , , |
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Lenguaje: | eng |
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2015
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Materias: | |
Acceso en línea: | https://dx.doi.org/10.1140/epjc/s10052-015-3649-5 http://cds.cern.ch/record/2038308 |
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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 |