Published September 2015 | Version v1
Journal article Metadata-only

Lepton flavour violating top decays at the LHC

Creators

  • 1. Universite de Lyon, Lyon (France)
  • 2. Universite Lyon 1, Villeurbanne (France)
  • 3. IPNL, CNRS/IN2P3, Villeurbanne Cedex (France)
  • 4. CERN PH-TH, Geneva 23 (Switzerland)

Description

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) x U(1)-invariant operators, arising from their loop contributions to rare decays and from HERA's single-top search. The bounds on e-μ flavour change are more restrictive than on l-τ; nonetheless the top could decay to a jet + e anti μ 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 → e anti μ + jet) ∝6 x 10-5, and we extrapolate that 100 fb-1 at 13 TeV could reach a sensitivity of ∝1 x 10-5. (orig.)

Availability note (English)

Available from: http://dx.doi.org/10.1140/epjc/s10052-015-3649-5

Additional details

Identifiers

DOI
10.1140/epjc/s10052-015-3649-5;

Publishing Information

Journal Title
European Physical Journal. C, Particles and Fields (Online)
Journal Volume
75
Journal Issue
9
Journal Page Range
p. 1-21
ISSN
1434-6052

INIS

Country of Publication
Germany
Country of Input or Organization
Germany
INIS RN
46130529
Subject category
S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS;
Descriptors DEI
ANNIHILATION OPERATORS; BRANCHING RATIO; CREATION OPERATORS; DIRAC OPERATORS; EXTRAPOLATION; FERMI INTERACTIONS; FEYNMAN DIAGRAM; HADRONS; JET MODEL; LEPTONS; MULTIPLE PRODUCTION; MUON NUMBER; PROTON-PROTON INTERACTIONS; SEMILEPTONIC DECAY; SU-3 GROUPS; SYMMETRY BREAKING; T QUARKS; TEV RANGE 01-10; TEV RANGE 10-100; U-1 GROUPS
Descriptors DEC
BARYON-BARYON INTERACTIONS; BASIC INTERACTIONS; DECAY; DIAGRAMS; DIMENSIONLESS NUMBERS; ELEMENTARY PARTICLES; ENERGY RANGE; FERMIONS; HADRON-HADRON INTERACTIONS; INFORMATION; INTERACTIONS; LEPTON NUMBER; LIE GROUPS; MATHEMATICAL MODELS; MATHEMATICAL OPERATORS; MATHEMATICAL SOLUTIONS; NUCLEON-NUCLEON INTERACTIONS; NUMERICAL SOLUTION; PARTICLE DECAY; PARTICLE INTERACTIONS; PARTICLE MODELS; PARTICLE PRODUCTION; POSTULATED PARTICLES; PROTON-NUCLEON INTERACTIONS; QUANTUM OPERATORS; QUARKS; SU GROUPS; SYMMETRY GROUPS; TEV RANGE; TOP PARTICLES; U GROUPS; WEAK INTERACTIONS; WEAK PARTICLE DECAY