Nnaturalness

Abstract

We present a new solution to the electroweak hierarchy problem. We introduce $N$ copies of the Standard Model with varying values of the Higgs mass parameter. This generically yields a sector whose weak scale is parametrically removed from the cutoff by a factor of $1/\sqrt{N}$. Ensuring that reheating deposits a majority of the total energy density into this lightest sector requires a modification of the standard cosmological history, providing a powerful probe of the mechanism. Current and near-future experiments will explore much of the natural parameter space. Furthermore, supersymmetric completions which preserve grand unification predict superpartners with mass below $m_W\times M_{\text{pl}}/M_{\text{GUT}}\sim 10$ TeV.

arXiv commentv2: journal version published in PRL as Solving the Hierarchy Problem at Reheating with a Large Number of Degrees of Freedom (14 pages, 5 figures)

References in corpus (18)

• Freeze-In Production of FIMP Dark Matter
• Supersymmetric Unification Without Low Energy Supersymmetry And Signatures for Fine-Tuning at the LHC
• Cosmological Relaxation of the Electroweak Scale
• Updated Bounds on Milli-Charged Particles
• First Look at the Physics Case of TLEP
• Black Holes and Large N Species Solution to the Hierarchy Problem
• Precision measures of the primordial abundance of deuterium
• How Massless Neutrinos Affect the Cosmic Microwave Background Damping Tail
• Probing Light Thermal Dark-Matter With a Higgs Portal Mediator
• Physics Opportunities of a 100 TeV Proton-Proton Collider
• Towards a cosmological neutrino mass detection
• Phenomenology of a very light scalar (100 MeV $<m_h<$ 10 GeV) mixing with the SM Higgs
• Phases of New Physics in the CMB
• A First Detection of the Acoustic Oscillation Phase Shift Expected from the Cosmic Neutrino Background
• Probing oscillations into sterile neutrinos with cosmology, astrophysics and experiments
• Cosmological Signatures of Interacting Neutrinos
• Phenomenology of 10^32 Dark Sectors
• Exotic Leptons: Higgs, Flavor and Collider Phenomenology

Cited by in corpus (92)

• Probing the pre-BBN universe with gravitational waves from cosmic strings
• Dark Quark Nuggets
• Probing Physics Beyond the Standard Model: Limits from BBN and the CMB Independently and Combined
• Solving the Hierarchy Problem Discretely
• Cosmology in Mirror Twin Higgs and Neutrino Masses
• The Price of Tiny Kinetic Mixing
• Gravitational Waves from Global Cosmic Strings and Cosmic Archaeology
• Cosmological Signals of a Mirror Twin Higgs
• $H_0$ tension as a hint for a transition in gravitational theory
• Phases of New Physics in the BAO Spectrum
• Constraints on Primordial Black Holes From Big Bang Nucleosynthesis Revisited
• Symmetry of Cosmological Observables, and a High Hubble Constant as an Indicator of a Mirror World Dark Sector
• Twin SIMPs
• Self-Organised Localisation
• Viable Twin Cosmology from Neutrino Mixing
• Mirror Twin Higgs Cosmology: Constraints and a Possible Resolution to the $H_0$ and $S_8$ Tensions
• Electroweak Baryogenesis above the Electroweak Scale
• Inflating to the Weak Scale
• The Selfish Higgs
• Probing the Particle Spectrum of Nature with Evaporating Black Holes
• Efficient Computation of Galaxy Bias with Neutrinos and Other Relics
• Relaxion and light (pseudo)scalars at the HL-LHC and lepton colliders
• Crunching Dilaton, Hidden Naturalness
• Clockworking FIMPs
• Electroweak relaxation of cosmological hierarchy
• Probing Decoupling in Dark Sectors with the Cosmic Microwave Background
• Ultralight Fermionic Dark Matter
• Cosmological Implications of Axion-Matter Couplings
• Probing the gauge symmetry breaking of the early universe in 3-3-1 models and beyond by gravitational waves
• Confronting interacting dark radiation scenarios with cosmological data
• Sliding Naturalness
• Making the Universe at 20 MeV
• Sliding Naturalness: Cosmological Selection of the Weak Scale
• Relaxing the Higgs mass and its vacuum energy by living at the top of the potential
• Relaxation of the Composite Higgs Little Hierarchy
• Scaling Transformations and the Origins of Light Relics Constraints from Cosmic Microwave Background Observations
• Black Hole Evaporation Beyond the Standard Model of Particle Physics
• Gravitational Wave Signals from Multiple Hidden Sectors
• Tests of Neutrino and Dark Radiation Models from Galaxy and CMB surveys
• CFTs Blueshift Tensor Fluctuations Universally
• Dark Spectroscopy
• Compact Dark Matter Objects via $N$ Dark Sectors
• Cosmological Relaxation through the Dark Axion Portal
• Hypercharged Naturalness
• Reheating in two-sector cosmology
• Molecular Chemistry for Dark Matter III: DarkKROME
• The Higgs boson Turns Ten
• Tensor Bounds on the Hidden Universe
• From axion quality and naturalness problems to a high-quality ${\mathbb{Z}}_N$ QCD relaxion
• Chiral Gravitational Waves from Chiral Fermions
• Dark Black Holes in the Mass Gap
• Colorful Twisted Top Partners and Partnerium at the LHC
• New Physics Search at the CEPC: a General Perspective
• Phases of Confining SU(5) Chiral Gauge Theory with Three Generations
• Scalar resonance in graviton-graviton scattering at high-energies: the graviball
• The Muon Smasher's Guide
• Paper-boat relaxion
• Signatures of Light Massive Relics on nonlinear structure formation
• Flavor from the double tetrahedral group without supersymmetry: flavorful axions and neutrinos
• Thick Branes in Extra Dimensions and Suppressed Dark Couplings
• A warped relaxion
• Electroweak Stability and Discovery Luminosities for New Physics
• Cosmological Constraints on Unstable Particles: Numerical Bounds and Analytic Approximations
• Higgs Squared
• The Stochastic Relaxion
• Charge Quantization and Neutrino Mass from Planck-scale SUSY
• Large Star/Rose Extra Dimension with Small Leaves/Petals
• Probing Higgs exotic decay at the LHC with machine learning
• Gauge field and brane-localized kinetic terms on the chiral square
• Constraints on Standard Model Constructions in F-theory
• Freezing-in the Hierarchy Problem
• Baryogenesis and Dark Matter in Multiple Hidden Sectors
• Detector-size Upper Bounds on Dark Hadron Lifetime from Cosmology
• Hubble selection of the weak scale from QCD quantum critical point
• A technique for natural gauge boson masses
• Big Bang Nucleosynthesis constraints on the cosmological evolution in a Universe with a Weylian Boundary
• Explanation for why the Early Universe was Stable and Dominated by the Standard Model
• Light Majorana Neutrinos in (Semi)invisible Meson Decays
• Fat brane, dark matter and localized kinetic terms in six dimensions
• The Hierarchy Problem: From the Fundamentals to the Frontiers
• Gravitational instantons and the quality problem of the QCD axion: Facts, speculations, and statements in between
• Fat brane and seesaw mechanism in extra dimensions
• Lectures on Naturalness, String Landscape and Multiverse
• Gauge hierarchy and metastability from Higgs-driven crunching
• Cosmological Implications of a Neutrino Mass Detection
• Numerical study of a cosmological relaxation model of the Higgs boson mass
• Forecasting Constraints on Non-Thermal Light Massive Relics from Future CMB Experiments (CMB-S4/Simons Observatory)
• Non-perturbative reheating and Nnaturalness
• The Forward Physics Facility at the High-Luminosity LHC
• A Closer Look in the Mirror: Reflections on the Matter/Dark Matter Coincidence
• Unitarizing infinite-range forces: Graviton-graviton scattering, the graviball, and Coulomb scattering
• Large-$N$ Random Matrix Gravity and the Double Hierarchy Problem