Charged Lepton Flavor Violating Processes and Scalar Leptoquark Decay Branching Ratios in the Colored Zee-Babu Model

Abstract

We consider a neutrino mass generating model which employs a scalar leptoquark, $\Delta$, and a scalar diquark, $S$. The new scalars $\Delta$ and $S$ carry the standard model $SU(3{)}_c\times SU(2{)}_L\times U(1{)}_Y$ quantum numbers $(3,1,-1/3)$ and $(6,1,-2/3)$, respectively. The neutrino masses are generated at the two-loop level, as in the Zee-Babu model\cite{Zee-Babu}, and $\Delta /S$ plays the role of the doubly/singly charged scalar in the Zee-Babu model. With a moderate working assumption that the magnitudes of the six Yukawa couplings between $S$ and the down-type quarks are of the same order, strong connections are found between the neutrino masses and the charged lepton flavor violating processes. In particular, we study $Z\to \overline{l}{l}^{\prime }$, and $l\to l^{\prime }\gamma$ and find that some portions of the parameter space of this model are within the reach of the planned charged lepton flavor violating experiments. Interesting lower bounds are predicted that $B(Z\rightarrow \overline{l} l')\gtrsim 10^{-16}-10^{-14}(10^{-14})\times(1\mbox{TeV}\cdot m_S/7 m_Δ^2)^2$ and $B(l\rightarrow l' γ)\gtrsim 10^{-17}-10^{-16}(10^{-18}-10^{-16})\times(1 \mbox{TeV}\cdot m_S/7 m_Δ^2)^2$ for neutrino masses being the normal(inverted) hierarchical pattern. The type of neutrino mass hierarchy could also be determined by measuring the charged lepton flavor violating double ratios. Moreover, definite leptoquark decay branching ratios are predicted when there is no Yukawa interaction between the right-handed fermions and $\Delta$ ( the branching fraction of $\Delta$ to a charged lepton and a quark is 50\%), which could help refine the collider search limit on the scalar leptoquark mass.

arXiv comment25 pages, 6 figures, publication version

References in corpus (36)

• Big-Bang Nucleosynthesis
• Final Report of the Muon E821 Anomalous Magnetic Moment Measurement at BNL
• Order of Magnitude Smaller Limit on the Electric Dipole Moment of the Electron
• Muon Decay and Physics Beyond the Standard Model
• Searches for Lepton Flavor Violation in the Decays tau -> e gamma and tau -> mu gamma
• Model-independent constraints on Delta F=2 operators and the scale of New Physics
• Observation of the diphoton decay of the Higgs boson and measurement of its properties
• First Look at the Physics Case of TLEP
• Measurement of Higgs boson production in the diphoton decay channel in $pp$ collisions at center-of-mass energies of 7 and 8 TeV with the ATLAS detector
• Testing new physics with the electron g-2
• Neutrinoless double-beta decay. A brief review
• Search for narrow resonances decaying to dijets in proton-proton collisions at sqrt(s) = 13 TeV
• Search for a Higgs boson decaying into a Z and a photon in pp collisions at sqrt(s) = 7 and 8 TeV
• The performance of the CMS muon detector in proton-proton collisions at sqrt(s) = 7 TeV at the LHC
• Two-loop Neutrino Mass Generation and its Experimental Consequences
• Prospects for the Zee-Babu Model at the LHC and low energy experiments
• Constraints on two-lepton, two quark operators
• Phenomenology of scalar leptoquarks
• Search for Higgs boson decays to a photon and a Z boson in pp collisions at sqrt(s)=7 and 8 TeV with the ATLAS detector
• Leptoquarks, Dark Matter, and Anomalous LHC Events
• Experimental tests for the Babu-Zee two-loop model of Majorana neutrino masses
• Search for the lepton flavor violating decay $Z\to e\mu$ in pp collisions at $\sqrt{s}$ = 8 TeV with the ATLAS detector
• Lepton number violation at the LHC with leptoquark and diquark
• On the Origin of Neutrino Masses
• New Scalar Contributions to $h\to Z\gamma$
• Search for second generation scalar leptoquarks in pp collisions at sqrt(s) = 7 TeV with the ATLAS detector
• A common origin of $R_K$ and neutrino masses
• Constraints on New Scalars from the LHC 125 GeV Higgs Signal
• An effective gauge-Higgs operators analysis of new physics associated with the Higgs
• Search for first generation scalar leptoquarks in pp collisions at sqrt(s) = 7 TeV with the ATLAS detector
• Search for first-generation leptoquarks at HERA
• Lepton Flavor Violation in Extra Dimension Models
• Evaluating The Two Loop Diagram Responsible For Neutrino Mass In Babu's Model
• Testing Realistic Quark Mass Matrices in the Custodial Randall-Sundrum Model with Flavor Changing Top Decays
• Flavour Changing Neutral Current Constraints from Kaluza-Klein Gluons and Quark Mass Matrices in RS1
• Neutrino Masses via the Zee Mechanism in 5D split fermions model

Cited by in corpus (13)

• From the trees to the forest: a review of radiative neutrino mass models
• General Neutrino Interactions from an Effective Field Theory Perspective
• A Call for New Physics : The Muon Anomalous Magnetic Moment and Lepton Flavor Violation
• Hunting for Heavy Majorana Neutrinos with Lepton Number Violating Signatures at LHC
• Surveying the SO(10) Model Landscape: The Left-Right Symmetric Case
• Matter Effect of Light Sterile Neutrino: An Exact Analytical Approach
• Minimal Radiative Neutrino Masses
• One colorful resolution to the neutrino mass generation, three lepton flavor universality anomalies, and the Cabibbo angle anomaly
• Phenomenology of Colored Radiative Neutrino Mass Model and Its Implications on the Cosmic-ray Observations
• Revisiting the Scalar Leptoquark ($S_1$) Model with the Updated Leptonic Constraints
• 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
• Neutrino masses and gauged $U(1{)}_{\ell }$ lepton number
• Probing Sterile Neutrino via Lepton Flavor Violating Decays of Mesons