Four Statements about the Fourth Generation

Abstract

This summary of the Workshop "Beyond the 3-generation SM in the LHC era" presents a brief discussion of the following four statements about the fourth generation: 1) It is not excluded by EW precision data; 2) It addresses some of the currently open questions; 3) It can accommodate emerging possible hints of new physics; 4) LHC has the potential to discover or fully exclude it.

Summary of the "Beyond the 3-generation SM in the LHC era" Workshop, CERN, September 4-5, 2008; 7 pages. V2: updated bibliography and minor typos fixed. To appear in PMC Physics A

References in corpus (23)

• Measurement of the Differential Branching Fraction and Forward-Backword Asymmetry for B->K(*)l+l-
• The DAMA/LIBRA apparatus
• Stable Massive Particles at Colliders
• Measurement of $\boldmath {B_s^0}$ mixing parameters from the flavor-tagged decay
• New observables in the decay mode anti-B --> anti-K*0 l+ l-
• The discovery of the fourth family at the LHC: what if?
• Large Time-dependent CP Violation in B_s^0 System and Finite D^0-D^0bar Mass Difference in Four Generation Standard Mode
• A model of electroweak-scale right-handed neutrino mass
• Four Generations, the Electroweak Phase Transition, and Supersymmetry
• Experimental constraints on fourth generation quark masses
• Electroweak Symmetry Breaking from a Holographic Fourth Generation
• The heavy quark search at the LHC
• Source of CP Violation for Baryon Asymmetry of the Universe
• Fourth Lepton Family is Natural in Technicolor
• Fourth Family Neutrinos and the Higgs Boson
• Searching For New Physics With B to K pi Decays
• Single Production of Fourth Family Quarks at the LHC
• A combined search for the standard model Higgs boson at sqrt{s}=1.96 TeV
• Flavor Democracy in Particle Physics
• Production of Single Heavy Charged Leptons at a Linear Collider
• New Flavor Interactions at the LHC
• A 4th generation scenario
• Bounding CKM Mixing with a Fourth Family

Cited by in corpus (167)

• Top-pair production at hadron colliders with next-to-next-to-leading logarithmic soft-gluon resummation
• Identifying top partners at LHC
• Extra vector-like matter and the lightest Higgs scalar boson mass in low-energy supersymmetry
• Baryon and Lepton Number as Local Gauge Symmetries
• Impact of a Higgs boson at a mass of 126 GeV on the standard model with three and four fermion generations
• Higgs Boson Studies at the Tevatron
• Analysis of $Λ_b \rar Λ\ell^+ \ell^-$ transition in SM4 using form factors from Full QCD
• Physics searches at the LHC
• Sealing the fate of a fourth generation of fermions
• Less space for a new family of fermions
• Model-Independent Searches for New Quarks at the LHC
• Precision Constraints on Extra Fermion Generations
• Search for heavy bottom-like quarks in 4.9 inverse femtobarns of pp collisions at sqrt(s) = 7 TeV
• Patterns of Flavour Violation in the Presence of a Fourth Generation of Quarks and Leptons
• An improved determination of the width of the top quark
• Discovering Technicolor
• Search for vector-like $B$ quarks in events with one isolated lepton, missing transverse momentum and jets at $\sqrt{s}=$ 8 TeV with the ATLAS detector
• Evasive Higgs Maneuvers at the LHC
• Search for a Vector-like Quark with Charge 2/3 in t + Z Events from pp Collisions at sqrt(s) = 7 TeV
• Search for heavy, top-like quark pair production in the dilepton final state in pp collisions at sqrt(s) = 7 TeV
• Lepton Flavour Violation in the Presence of a Fourth Generation of Quarks and Leptons
• Renormalization Group Fixed Point with a Fourth Generation: Higgs-induced Bound States and Condensates
• Constraints on Mass Spectrum of Fourth Generation Fermions and Higgs Bosons
• Co-genesis of Matter and Dark Matter with Vector-like Fourth Generation Leptons
• Search for down-type fourth generation quarks with the ATLAS detector in events with one lepton and hadronically decaying W bosons
• Flavor and CP Violation with Fourth Generations Revisited
• Dark Matter-Motivated Searches for Exotic 4th Generation Quarks in Tevatron and Early LHC Data
• Topological invariants for Standard Model: from semi-metal to topological insulator
• Search for pair production of heavy top-like quarks decaying to a high-pT W boson and a b quark in the lepton plus jets final state at sqrt(s)=7 TeV with the ATLAS detector
• Implications of Higgs Searches on the Four Generation Standard Model
• Constraints on the Four-Generation Quark Mixing Matrix from a Fit to Flavor-Physics Data
• Minimal Vector-like leptonic Dark Matter and Signatures at the LHC
• Combined Tevatron upper limit on gg->H->W+W- and constraints on the Higgs boson mass in fourth-generation fermion models
• Search for pair-produced heavy quarks decaying to Wq in the two-lepton channel at sqrt(s) = 7 TeV with the ATLAS detector
• Measurements of the associated production of a Z boson and b jets in pp collisions at sqrt(s) = 8 TeV
• Search for pair production of a heavy up-type quark decaying to a W boson and a b quark in the lepton+jets channel with the ATLAS detector
• Two Higgs doublets with 4th generation fermions - models for TeV-scale compositeness
• Low Energy Supersymmetry with Baryon and Lepton Number Gauged
• Dynamical Electroweak Symmetry Breaking with a Heavy Fourth Generation
• Pseudoscalar Higgs Bosons at the LHC: Production and Decays into Electroweak Gauge Bosons Revisited
• Search for a Heavy Bottom-like Quark in pp Collisions at sqrt(s) = 7 TeV
• Search for the production of single vector-like and excited quarks in the $Wt$ final state in $pp$ collisions at $\sqrt{s}$ = 8 TeV with the ATLAS detector
• Direct Mass Limits for Chiral Fourth-Generation Quarks in All Mixing Scenarios
• Combined search for the Higgs boson with the D0 experiment
• Fourth Lepton Family is Natural in Technicolor
• Scalar Dark Matter and Standard Model with Four Generations
• Search for heavy quarks decaying into a top quark and a W or Z boson using lepton + jets events in pp collisions at sqrt(s) = 7 TeV
• Next-to-Leading Order Cross Sections for New Heavy Fermion Production at Hadron Colliders
• BSM Higgs Physics in the Exclusive Forward Proton Mode at the LHC
• Search for new physics in high $p_T$ like-sign dilepton events at CDF~II
• Relating B_s Mixing and B_s -> mu+mu- with New Physics
• Closing in on a perturbative fourth generation
• The Impact of a 4th Generation on Mixing and CP Violation in the Charm System
• Searches for Higgs bosons in pp collisions at sqrt(s) = 7 and 8 TeV in the context of four-generation and fermiophobic models
• Azimuthal Correlations in Top Pair Decays and The Effects of New Heavy Scalars
• Fourth Generation Bound States
• A dark force for baryons
• Masses of a Fourth Generation with Two Higgs Doublets
• Higgs Boson Production via Gluon Fusion in the Standard Model with four Generations
• CP violation and the 4th generation
• Early LHC Phenomenology of Yukawa-bound Heavy Q\bar{Q} Mesons
• Fermion WIMPless Dark Matter at DeepCore and IceCube
• Anomalous single production of fourth generation $t^{\prime }$ quarks at ILC and CLIC
• The Lepton Sector of a Fourth Generation
• Generational Structure of Models with Dynamical Symmetry Breaking
• Proton stability from a fourth family
• Higgs-Yukawa model in chirally-invariant lattice field theory
• Constraining a fourth generation of quarks: non-perturbative Higgs boson mass bounds
• Search for the standard model and a fermiophobic Higgs boson in diphoton final states
• Search for single b*-quark production with the ATLAS detector at sqrt(s)=7 TeV
• The Fourth Standard Model Family and the Competition in Standart Model Higgs Boson Search at Tevatron and LHC
• Higgs boson mass bounds in the presence of a very heavy fourth quark generation
• Four Generations: SUSY and SUSY Breaking
• An A_5 Model of Four Lepton Generations
• Collider signals of a composite Higgs in the Standard Model with four generations
• The 125 GeV Higgs in the context of four generations with 2 Higgs doublets
• Associated production of $Z$ bosons and $b$-jets at the LHC in the combined $k_T$ + collinear QCD factorization approach
• Large mass splittings for fourth generation fermions allowed by LHC Higgs exclusion
• Searches for the $t^{\prime }$ of a fourth family
• Leading Effect of CP Violation with Four Generations
• A Search for the Fourth SM Family: Tevatron still has a Chance
• Revisiting Constraints on Fourth Generation Neutrino Masses
• A new window at the LHC: BSM signals using tagged protons
• OPUCEM: A Library with Error Checking Mechanism for Computing Oblique Parameters
• Search for the standard model Higgs boson in $\mathbf{\ell }\mathbf{\nu }$+jets final states in 9.7~fb${}^{-1}$ of $\mathbf{p}\bar{\mathbf{p}}$ collisions with the D0 detector
• A hybrid 4${}^{\text{th}}$ generation: Technicolor with top-seesaw
• An improved observable for the forward-backward asymmetry in B -> K* l+ l- and Bs -> phi l+ l-
• Implication of possible observation of enhanced Bd0 --> mu+ mu- decay
• Implications of the Stability and Triviality Bounds on the Standard Model with Three and Four Chiral Generations
• Top Quark Physics at the Tevatron
• Observation of CP violation in $D^0\to K^{-}{\pi }^{+}$ as a smoking gun for New Physics
• The b' search at the LHC
• Three Extra Mirror or Sequential Families: a Case for Heavy Higgs and Inert Doublet
• Chromomagnetic and chromoelectric dipole moments of the top quark in the 4GTHDM
• B's with Direct Decays: Tevatron and LHC Discovery Prospects in the b\bar{b}+MET Channel
• Electroweak Constraints on the Fourth Generation at Two Loop Order
• On the nature of the fourth generation neutrino and its implications
• Combining LEP and LHC to bound the Higgs Width
• Fourth Generation Majorana Neutrinos
• Electroweak Precision Observables within a Fourth Generation Model with General Flavour Structure
• Closing in on new chiral leptons at the LHC
• The Need for New Search Strategies for Fourth Generation Quarks at the LHC
• Productions of heavy charged leptons via gluon fusion at LHC: A revisit
• Mass Mixing, the Fourth Generation, and the Kinematic Higgs Mechanism
• Complementarity of Semileptonic $B$ to $K_2^{\ast }(1430)$ and $K^{\ast }(892)$ Decays in the Standard Model with Fourth Generation
• Neutrino Masses and a Fourth Generation of Fermions
• $\mu -e$ Conversion With Four Generations
• Fourth generation quark mass limits in CKM-element space
• Impact on the Higgs Production Cross Section and Decay Branching Fractions of Heavy Quarks and Leptons in a Fourth Generation Model
• Constraints on fourth generation Majorana neutrinos
• Oblique Parameters and Extra Generations via OPUCEM
• Tevatron Discovery Potential for Fourth Generation Neutrinos: Dirac, Majorana and Everything in Between
• Measuring the Fourth Generation b --> s Quadrangle at the LHC
• Perspectives and Outlook from HEP Window on the Universe
• BSM Higgs Studies at the LHC in the Forward Proton Mode
• Experimental Sensitivity for Majorana Neutrinos Produced via a Z Boson at Hadron Colliders
• The Spectrum of the 4-Generation Dirac-Kaehler Extension of the SM
• Neutrino masses from new generations
• Detecting Fourth Generation Quarks at Hadron Colliders
• Dynamical Symmetry Breaking With a Fourth Generation
• Binary Icosahedral Flavor Symmetry for Four Generations of Quarks and Leptons
• Two heavy fermions bound via Higgs boson exchange
• Minimal Signatures of Naturalness
• Radiative corrections in fermion bags bound by Higgs boson exchange
• Fourth generation Majorana neutrino, dark matter and Higgs physics
• A Search for the Fourth SM Family Quarks through Anomalous Decays
• Electroweak Symmetry Breaking From Monopole Condensation
• Fourth-generation SM imprints in B -> K^*l^+l^- decays with polarized K^*
• Chiral heavy fermions in a two Higgs doublet model: 750 GeV resonance or not
• Conformal Completion of the Standard Model with a Fourth Generation
• Searching For Resonances inside Top-like Events
• Measurements of the Production, Decay and Properties of the Top Quark: A Review
• Measuring the Magnitude of the Fourth-Generation CKM4 Matrix Element V_{t'b'}
• Masses and decay constants of bound states containing fourth family quarks from QCD sum rules
• Search for new phenomena in events with two $Z$ bosons and missing transverse momentum in $p\bar{p}$ collisions at $\sqrt{s}=1.96$ TeV
• Heavy QQ(bar) "Fireball" Annihilation to Multiple Vector Bosons
• Review of Physics Results from the Tevatron: Higgs Boson Physics
• Vector like leptons with extended Higgs sector
• Threshold Effects in the Decay of Heavy b' and t' Quarks
• Realistic Four-Generation MSSM in Type II String Theory
• Scalar Decay Constant and Yukawa Coupling in Walking Gauge Theories
• Bounds on fourth generation induced Lepton Flavour Violating double insertions in Supersymmetry
• A note on the coupling of the techni-dilaton to the weak bosons
• Observing CP-violating Higgs Signals with Heavy Majorana Neutrinos
• Standard Model Extension with Flipped Generations
• Lepton polarization asymmetry in $B_{(}s,d{)}^{\ast }$ arrow ${\mu }^{+}{\mu }^{-}$ with new Z' couplings
• Pseudoscalar Higgs Boson Decays into W and Z Bosons Revisited
• Associated production of Z boson and a pair of new quarks at the LHC
• Anomalous single production of fourth family up type quark associated with neutral gauge bosons at the LHC
• Comments on the Minimal Vectorial Standard Model
• The fourth generation, linac-ring type colliders, preons and so on
• The Naturalness of the Fourth SM Family
• Exotic Searches at LHC and Tevatron
• Semileptonic B to Scalar meson Decays in the Standard Model with Fourth Generation
• A Fourth Neutrino and its Consequences on CP Asymmetries
• Z'-> ggg decay in left-right symmetric models with three and four fermion families
• Higgs boson mass bounds in the presence of a heavy fourth quark family
• Natural Four-Generation Mass Textures in MSSM Brane Worlds
• A search for the first generation charged vector-like leptons at future colliders
• Pair Production of Fourth Family Charged Sleptons at $e^{+}{e}^{-}$ Colliders
• Decays of Fourth Generation Bound States
• Can new generations explain neutrino masses?
• Relating B_s Mixing and B_s->mu+mu- with New Physics - An Update
• Highlights of Flavour Violation in the Presence of a 4th Generation
• Neutron EDM in Four Generation Standard Model
• Single Production of Fourth Family Sneutrino via RPV Couplings at Linear Colliders
• Test of the 4-th quark generation from the Cabibbo-Kobayashi-Maskawa matrix