Radiative and flavor-violating transitions of leptons from interactions with color-octet particles

Abstract

It has been recently proposed that neutrino mass could originate from Yukawa interactions of leptons with new colored particles. This raises the interesting possibility of testing mass generation through copious production of those particles at hadron colliders. A realistic assessment of it however should take into account how large those interactions could be from available precision results. In this work we make a systematic analysis to the flavor structure in Yukawa couplings, provide a convenient parametrization to it, and investigate the rare radiative and pure leptonic decays of the muon and tau leptons. For general values of parameters the muon decays set stringent constraints on the couplings, and all rare tau decays are far below the current experimental sensitivity. However, there is room in parameter space in which the muon decays could be significantly suppressed by destructive interference between colored particles without generically reducing the couplings themselves. This is also the region of parameters that is relevant to collider physics. We show that for this part of parameter space some tau decays can reach or are close to the current level of precision.

20 pages, 7 figures

References in corpus (14)

• Searches for Lepton Flavor Violation in the Decays tau -> e gamma and tau -> mu gamma
• Flavour physics of leptons and dipole moments
• Low energy effects of neutrino masses
• Neutrino mass, Dark Matter and Baryon Asymmetry via TeV-Scale Physics without Fine-Tuning
• Flavor Changing Neutral Currents, an Extended Scalar Sector, and the Higgs Production Rate at the LHC
• New Mechanism for Neutrino Mass Generation and Triply Charged Higgs Bosons at the LHC
• A model of electroweak-scale right-handed neutrino mass
• On the Origin of Neutrino Masses
• Search for Lepton Flavor Violating tau Decays into Three Leptons
• Lepton flavour violation in The Little Higgs model
• Electroweak-scale mirror fermions, $\mu \to e\gamma$ and $\tau \to \mu \gamma$
• Lepton Flavor Violating Muon Decays in a Model of Electroweak-Scale Right-Handed Neutrinos
• Color Octet Leptogenesis
• Lepton-Flavor-Violating tau decays at BaBar

Cited by in corpus (14)

• From the trees to the forest: a review of radiative neutrino mass models
• Naturally Small Dirac Neutrino Mass with Intermediate $SU(2{)}_L$ Multiplet Fields
• Generalizing the Scotogenic model
• Interpretation of 750 GeV Diphoton Excess at LHC in Singlet Extension of Color-octet Neutrino Mass Model
• Cascade Seesaw for Tiny Neutrino Mass
• Radiative Neutrino Mass with $Z_3$ Dark matter: From Relic Density to LHC Signatures
• Lepton Number and Lepton Flavor Violation through Color Octet States
• Phenomenology in Minimal Cascade Seesaw for Neutrino Mass
• Testing Type II Radiative Seesaw Model: from Dark Matter Detection to LHC Signatures
• Flavor Violating Transitions of Charged Leptons from a Seesaw Mechanism of Dimension Seven
• Phenomenology of Colored Radiative Neutrino Mass Model and Its Implications on the Cosmic-ray Observations
• Freed Leptogenesis
• The Decomposition of Neutron-Antineutron Oscillation Operators
• Charged Lepton Flavor-violating Transitions in Color Octet Model