Lepton flavor violating decays of vector quarkonia and of the $Z$ boson

Abstract

We address the impact of sterile fermions on the lepton flavor violating decays of quarkonia as well as of the $Z$ boson. We compute the relevant Wilson coefficients and show that the $\mathrm{B}(V\to {\ell }_{\alpha }{\ell }_{\beta })$, where $V=\varphi ,{\psi }^{(n)}$, ${{\rm Y}}^{(n)},Z$ can be significantly enhanced in the case of large sterile fermion masses and a non-negligible active-sterile mixing. We illustrate that feature in a specific minimal realization of the inverse seesaw mechanism, known as $(2,3)$-ISS, and in an effective model in which the presence of non-standard sterile fermions is parameterized by means of one heavy sterile (Majorana) neutrino.

23 pages, 7 figures, (published version)

References in corpus (21)

• Too big to fail? The puzzling darkness of massive Milky Way subhaloes
• The Reactor Antineutrino Anomaly
• Updated fit to three neutrino mixing: status of leptonic CP violation
• Light Sterile Neutrinos: A White Paper
• Statistical Significance of the Gallium Anomaly
• Unitarity of the Leptonic Mixing Matrix
• Non-Standard Neutrino Interactions with Matter from Physics Beyond the Standard Model
• Physics at Super B Factory
• Non-unitarity of the leptonic mixing matrix: Present bounds and future sensitivities
• CP-violation from non-unitary leptonic mixing
• Realistic sterile neutrino dark matter with keV mass does not contradict cosmological bounds
• Limits on nu_e and anti-nu_e disappearance from Gallium and reactor experiments
• Research Proposal for an Experiment to Search for the Decay μ -> eee
• MEG Upgrade Proposal
• Indirect searches for sterile neutrinos at a high-luminosity Z-factory
• The ${\rm Y}$ and ${{\rm Y}}^{\prime }$ Leptonic Widths, $a_{\mu }^b$ and $m_b$ from full lattice QCD
• Search for the lepton flavor violating decay $Z\to e\mu$ in pp collisions at $\sqrt{s}$ = 8 TeV with the ATLAS detector
• Dark Matter in the minimal Inverse Seesaw mechanism
• New bounds on lepton flavor violating decays of vector mesons and the Z0 boson
• Report of the ICFA Beam Dynamics Workshop 'Accelerators for a Higgs Factory: Linear vs. Circular' (HF2012)
• Higher angular momentum states of bottomonium in lattice NRQCD

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