Complete Vector-like Fourth Family with ${\mathrm{U}(1)}^{\prime }$: A Global Analysis

Abstract

In this paper we present an in-depth analysis of a recently proposed Standard Model extension with a complete fourth generation of quarks and leptons, which are vector-like with respect to the Standard Model gauge group and charged under a new spontaneously broken vector-like $\mathrm{U}(1{)}^{\prime }$ gauge symmetry. The model is designed to explain the known muon anomalies, i.e. the observed deviations from Standard Model predictions in the anomalous magnetic moment of the muon, $\Delta a_{\mu }$, and in $b\to s{\ell }^{+}{\ell }^{-}$ processes. We perform a global ${\chi }^2$ analysis of the data with $65$ model parameters and including $98$ observables. We find many points with ${\chi }^2$ per degree of freedom $\le 1$. The vector-like leptons and the new heavy $Z^{\prime }$ are typically much lighter than a TeV and would, thus, be eminently visible at the HL-LHC.

arXiv comment80 pages, 9 figures and 21 tables

References in corpus (112)

• The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
• Weak Decays Beyond Leading Logarithms
• UFO - The Universal FeynRules Output
• Averages of $b$-hadron, $c$-hadron, and $\tau$-lepton properties as of summer 2016
• The Muon g-2
• FeynRules - Feynman rules made easy
• Measurement of the fine-structure constant as a test of the Standard Model
• FLAG Review 2019
• Muon Decay and Physics Beyond the Standard Model
• The Anatomy of Electro-Weak Symmetry Breaking. I: The Higgs boson in the Standard Model
• The Belle II Physics Book
• Neutrino Trident Production: A Powerful Probe of New Physics with Neutrino Beams
• B_{s,d} -> l+ l- in the Standard Model with Reduced Theoretical Uncertainty
• Effective Hamiltonian for $B \ra X_s e^+ e^-$ Beyond Leading Logarithms in the NDR and HV Schemes
• The Muon Anomalous Magnetic Moment: A Harbinger For "New Physics"
• Explaining $h\to {\mu }^{\pm }{\tau }^{\mp }$, $B\to K^{\ast }{\mu }^{+}{\mu }^{-}$ and $B\to K{\mu }^{+}{\mu }^{-}/B\to K{e}^{+}{e}^{-}$ in a two-Higgs-doublet model with gauged $L_{\mu }-L_{\tau }$
• Photonic penguins at two loops and m_t-dependence of BR[ B -> X_s l^+ l^-]
• Dressing L_mu - L_tau in Color
• Search for high-mass dilepton resonances using 139 fb${}^{-1}$ of $pp$ collision data collected at $\sqrt{s}=$13 TeV with the ATLAS detector
• Effective field theory approach to $b\to s\ell {\ell }^{(\prime )}$, $B\to K^{(\ast )}\nu \bar{\nu }$ and $B\to D^{(\ast )}\tau \nu$ with third generation couplings
• The Rare Decays $K\to \pi \nu \bar{\nu }$, $B\to X\nu \bar{\nu }$ and $B\to l^{+}{l}^{-}$ -- An Update
• Patterns of New Physics in $b\to s{\ell }^{+}{\ell }^{-}$ transitions in the light of recent data
• Flavour anomalies after the $R_{K^{\ast }}$ measurement
• Combined explanations of $(g-2{)}_{\mu ,e}$ and implications for a large muon EDM
• The design of the MEG II experiment
• Probing New Physics via the $B_s^0\to {\mu }^{+}{\mu }^{-}$ Effective Lifetime
• Interpreting Hints for Lepton Flavor Universality Violation
• QCD corrections to FCNC decays mediated by Z-penguins and W-boxes
• General formulae for f1 --> f2 gamma
• Quark mass relations to four-loop order
• B-decay discrepancies after Moriond 2019
• Towards the discovery of new physics with lepton-universality ratios of $b\to s\ell \ell$ decays
• Branching Ratio Measurements of $B_s$ Decays
• Master Formulae for Delta F=2 NLO-QCD Factors in the Standard Model and Beyond
• Emerging patterns of New Physics with and without Lepton Flavour Universal contributions
• Anatomy and Phenomenology of mu-tau Lepton Flavour Violation in the MSSM
• Running quark and lepton parameters at various scales
• Lepton-flavour violating $B$ decays in generic $Z^{\prime }$ models
• Vector-like leptons: Higgs decays and collider phenomenology
• On epsilon_K beyond lowest order in the Operator Product Expansion
• Next-to-Next-to-Leading-Order Charm-Quark Contribution to the CP Violation Parameter epsilon_K and Delta M_K
• Correlations among new CP violating effects in Delta F = 2 observables
• Search for B --> K(*) nu nubar and invisible quarkonium decays
• Testing new physics with the electron g-2
• Explanation of the Muon g-2 Anomaly with Vectorlike Leptons and its Implications for Higgs Decays
• $B_{(s)}^0$-mixing matrix elements from lattice QCD for the Standard Model and beyond
• New Physics in $b\to s{\mu }^{+}{\mu }^{-}$ after the Measurement of $R_{K^{\ast }}$
• Axion-like particles, lepton-flavor violation and a new explanation of $a_{\mu }$ and $a_e$
• New strategies for New Physics search in B -> K* nu anti-nu, B -> K nu anti-nu and B -> X(s) nu anti-nu decays
• Status of the $B\to K^{\ast }{\mu }^{+}{\mu }^{-}$ anomaly after Moriond 2017
• Next--to--Leading Order QCD corrections for the $B^0\overline{B^0}$--mixing with an extended Higgs sector
• Epsilon_K at Next-to-Next-to-Leading Order: The Charm-Top-Quark Contribution
• New Physics in $b\to s{\ell }^{+}{\ell }^{-}$ confronts new data on Lepton Universality
• Vectorlike leptons at the Large Hadron Collider
• A Tale of Two Anomalies
• Searching for New Physics with $b\to s{\tau }^{+}{\tau }^{-}$ processes
• Z' models for the LHCb and g-2 muon anomalies
• Continuing search for new physics in $b\to s\mu \mu$ decays: two operators at a time
• The $B$ Anomalies and New Physics in $b\to s{e}^{+}{e}^{-}$
• Bs mixing observables and Vtd/Vts from sum rules
• Update on the b->s anomalies
• Neutrino Tridents at DUNE
• Search for B -> h(*) nu nubar with the full Belle Y(4S) data sample
• Survey of vector-like fermion extensions of the Standard Model and their phenomenological implications
• One constraint to kill them all?
• Explaining electron and muon $g-2$ anomaly in SUSY without lepton-flavor mixings
• $\mu \to e\gamma$ and $\mu \to 3e$ processes with polarized muons and supersymmetric grand unified theories
• Probing New Physics with the B_s to μ+ μ- Time-Dependent Rate
• Generic Loop Effects of New Scalars and Fermions in $b\to s{\ell }^{+}{\ell }^{-}$, $(g-2{)}_{\mu }$ and a Vector-like $4^{\mathrm{th}}$ Generation
• A light complex scalar for the electron and muon anomalous magnetic moments
• Explaining the $R_K$ and $R_{K^{\ast }}$ anomalies
• The Anatomy of Z' and Z with Flavour Changing Neutral Currents in the Flavour Precision Era
• B-physics from Nf=2 tmQCD: the Standard Model and beyond
• A $L_{\mu }-L_{\tau }$ theory of Higgs flavor violation and $(g-2{)}_{\mu }$
• Loop effects of heavy new scalars and fermions in $b\to s{\mu }^{+}{\mu }^{-}$
• Search for vector-like leptons in multilepton final states in proton-proton collisions at $\sqrt{s}$ = 13 TeV
• Explanation of electron and muon g-2 anomalies in the MSSM
• Linear flavour violation and anomalies in B physics
• Limits on Vectorlike Leptons from Searches for Anomalous Production of Multi-Lepton Events
• Anthropic solution to the magnetic muon anomaly: the charged see-saw
• The simple interpretations of lepton anomalies in the lepton-specific inert two-Higgs-doublet model
• Neutrino Trident Scattering at Near Detectors
• Complete Vector-like Fourth Family and new $\mathrm{U}(1{)}^{\prime }$ for Muon Anomalies
• Implications for New Physics in $b\to s\mu \mu$ transitions after recent measurements by Belle and LHCb
• Flavourful $Z^{\prime }$ portal for vector-like neutrino Dark Matter and $R_{K^{(\ast )}}$
• Prospects for vectorlike leptons at future proton-proton colliders
• Electron g-2 with flavor violation in MSSM
• Search for heavy lepton resonances decaying to a $Z$ boson and a lepton in $pp$ collisions at $\sqrt{s}=8$ TeV with the ATLAS detector
• Hadronic and New Physics Contributions to $b\to s$ Transitions
• A "Vector-like chiral" fourth family to explain muon anomalies
• Flavourful $Z^{\prime }$ models for $R_{K^{(\ast )}}$
• Search for $B^{+}\to K^{+}{\tau }^{+}{\tau }^{-}$ at the BaBar experiment
• Vector-like Leptons: Muon g-2 Anomaly, Lepton Flavor Violation, Higgs Decays, and Lepton Non-Universality
• Flavor anomalies and dark matter in SUSY with an extra U(1)
• $B_s\to {\mu }^{+}{\mu }^{-}$ as current and future probe of new physics
• D-Dbar Mixing in the Standard Model and Beyond from Nf=2 Twisted Mass QCD
• Is it possible to explain the muon and electron $g-2$ in a $Z^{\prime }$ model?
• Neutrino-nucleus cross sections for W-boson and trident production
• Atmospheric Trident Production for Probing New Physics
• Correlating the anomalous results in $b\to s$ decays with inert Higgs doublet dark matter and muon $(g-2)$
• Collider Constraints on $Z^{\prime }$ Models for Neutral Current $B-$Anomalies
• Impact of the $b\to sll$ anomalies on dark matter physics
• Complete NLO QCD Corrections for Tree Level Delta F = 2 FCNC Processes
• $g_{\mu }-2$ from Vector-Like Leptons in Warped Space
• Neutrino Trident Production at the Intensity Frontier
• $R(K^{(\ast )})$ from dark matter exchange
• B anomalies and dark matter: a complex connection
• The Anatomy of Neutral Scalars with FCNCs in the Flavour Precision Era
• Lepton non-universality in $B$ decays and fermion mass structure
• Identifying a $Z^{\prime }$ behind $b\to s\ell \ell$ anomalies at the LHC
• Flavour Physics and CP Violation: Expecting the LHC
• Global Bayesian Analysis of new physics in $b\to s\mu \mu$ transitions after Moriond-2019

Cited by in corpus (24)

• Global Analysis of Leptophilic Z' Bosons
• Current status and muon $g-2$ explanation of lepton portal dark matter
• Muon $g-2$ and CKM Unitarity in Extra Lepton Models
• Probing the $R_{K^{(\ast )}}$ Anomaly at a Muon Collider
• Fermion mass hierarchies from vector-like families with an extended 2HDM and a possible explanation for the electron and muon anomalous magnetic moments
• Unified Explanation of the Anomalies in Semi-Leptonic $B$ decays and the $W$ Mass
• Signals with six bottom quarks for charged and neutral Higgs bosons
• Universal Inverse seesaw mechanism as a source of the SM fermion mass hierarchy
• Towards excluding a light $Z^{\prime }$ explanation of $b\to s{\ell }^{+}{\ell }^{-}$
• New physics interpretation of $W$-boson mass anomaly
• Seesaw lepton masses and muon $g-2$ from heavy vector-like leptons
• Tau-jet signatures of vectorlike quark decays to heavy charged and neutral Higgs bosons
• $W$ mass in a model with vector-like leptons and $U(1{)}^{\prime }$
• Data-driven study of the implications of anomalous magnetic moments and lepton flavor violating processes of $e$, $\mu$ and $\tau$
• Current status on pair-produced muon-philic vectorlike leptons in multilepton channels at the LHC
• On the LHC signatures of $SU(5)\times U(1{)}^{\prime }$ F-theory motivated models
• Leptonic cascade decays of a heavy Higgs boson through vectorlike leptons at the LHC
• The Two Scales of New Physics in Higgs Couplings
• Fermion mass hierarchy and g-2 anomalies in an extended 3HDM Model
• Semi-visible dark photon in a model with vector-like leptons for the $(g-2{)}_{e,\mu }$ and $W$-boson mass anomalies
• TeV-scale vector leptoquark from Pati-Salam unification with vectorlike families
• Higgs flavor phenomenology in a supersymmetric left-right model with parity
• Fermiophobic $Z^{\prime }$ model for simultaneously explaining the muon anomalies $R_{K^{(\ast )}}$ and $(g-2{)}_{\mu }$
• $\ge 4\mu$ signal from a vector-like lepton decaying to a muon-philic $Z^{\prime }$ boson at the LHC