Lepton Flavour Violating top decays at the LHC

Abstract

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 $\sim 1\times 10^{-5}$.

10 pages + Appendices

References in corpus (29)

• The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
• New parton distributions for collider physics
• Vector boson pair production at the LHC
• MCFM for the Tevatron and the LHC
• Flavour physics of leptons and dipole moments
• A global approach to top-quark flavor-changing interactions
• SUSY-induced FCNC top-quark processes at the Large Hadron Collider
• Imprints of massive inverse seesaw model neutrinos in lepton flavor violating Higgs boson decays
• Constraints on two-lepton, two quark operators
• Composite Higgs-Mediated FCNC
• Indirect searches for sterile neutrinos at a high-luminosity Z-factory
• Explaining the CMS Higgs flavor violating decay excess
• Cornering Scalar Leptoquarks at LHC
• Search for the lepton flavor violating decay $Z\to e\mu$ in pp collisions at $\sqrt{s}$ = 8 TeV with the ATLAS detector
• Comprehensive Analysis on Lepton Flavor Violating Higgs Boson to mu tau Decay in Supersymmetry without R Parity
• New Physics effects in the flavor-changing neutral couplings of the Top quark
• Model building for flavor changing Higgs couplings
• Scalar FCNC and rare top decays in a two Higgs doublet model "for the top"
• SUSY induced top quark FCNC decay $t\to ch$ after Run I of LHC
• Higgs to mu tau Decay in Supersymmetry without R Parity
• Majorana neutrinos and lepton-number-violating signals in top-quark and W-boson rare decays
• Rare Decay of the Top t->c l lbar and Single Top Production at International Linear Collider
• Dimension six FCNC operators and top production at the LHC
• Combined effects of strong and electroweak FCNC effective operators in top quark physics at the LHC
• New bounds on lepton flavor violating decays of vector mesons and the Z0 boson
• Searching for t->c(u)h with dipole moments
• Three-generation baryon and lepton number violation at the LHC
• Top quark three-body decays in the R-parity violating MSSM
• Top quark rare three-body decays in the littlest Higgs model with T-parity

Cited by in corpus (18)

• Physics of leptoquarks in precision experiments and at particle colliders
• The Standard Model as an Effective Field Theory
• Constraining top quark effective theory in the LHC Run II era
• Charged Lepton Flavor Violation at the EIC
• $R_2$ as a single leptoquark solution to $R_{D^{(\ast )}}$ and $R_{K^{(\ast )}}$
• Mu to e gamma and matching at mW
• New flavor physics in di- and tri-lepton events from single-top at the LHC and beyond
• A Detailed Analysis of Flavour-changing Decays of Top Quarks as a Probe of New Physics at the LHC
• Top-quark physics at the Large Hadron Collider
• Probing the top quark flavor-changing couplings at CEPC
• UV physics from IR features: new prospects from top flavor violation
• Multi-lepton probes of new physics and lepton-universality in top-quark interactions
• Constraints on 2l2q operators from $\mu -e$ flavour-changing meson decays
• Search for charged-lepton flavor violation in top quark production and decay in pp collisions at $\sqrt{s}=$ 13 TeV
• Effective Field Theory in the top sector: do multijets help?
• Machine Learning Approaches to Top Quark Flavor-Changing Four-Fermion Interactions in Trilepton Signals at the LHC
• Search for charged-lepton-flavour violating $\mu \tau qt$ interactions in top-quark production and decay in $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector at the LHC
• Search for charged-lepton flavor violation in the production and decay of top quarks using trilepton final states in proton-proton collisions at $\sqrt{s}$ = 13 TeV