Light composite scalar in eight-flavor QCD on the lattice

Abstract

We present the first observation of a flavor-singlet scalar meson as light as the pion in $N_f=8$ QCD on the lattice, using the Highly Improved Staggered Quark action. Such a light scalar meson can be regarded as a composite Higgs with mass 125 GeV. In accord with our previous lattice results showing that the theory exhibits walking behavior, the light scalar may be a technidilaton, a pseudo Nambu-Goldstone boson of the approximate scale symmetry in walking technicolor.

5 pages, 3 figures; presentation improved and systematic errors corrected

References in corpus (7)

• Observation of a new particle in the search for the Standard Model Higgs boson with the ATLAS detector at the LHC
• Observation of a new boson at a mass of 125 GeV with the CMS experiment at the LHC
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Cited by in corpus (90)

• Strongly interacting dynamics and the search for new physics at the LHC
• Lattice tests of beyond Standard Model dynamics
• Nonperturbative investigations of SU(3) gauge theory with eight dynamical flavors
• Low-energy effective action for pions and a dilatonic meson
• Addressing the B-physics anomalies in a fundamental Composite Higgs Model
• Light flavor-singlet scalars and walking signals in $N_f=8$ QCD on the lattice
• The Baryon Asymmetry from a Composite Higgs
• Dilaton Chiral Perturbation Theory - Determining Mass and Decay Constant of Technidilaton on the Lattice
• Dilaton EFT Framework For Lattice Data
• Lattice simulations with eight flavors of domain wall fermions in SU(3) gauge theory
• 750 GeV Diphoton Signal from One-Family Walking Technipion
• Analysis of a Dilaton EFT for Lattice Data
• The infrared regime of SU(2) with one adjoint Dirac flavour
• The Dilaton Potential and Lattice Data
• Order parameters and color-flavor center symmetry in QCD
• Composite Higgs model at a conformal fixed point
• Fate of the conformal fixed point with twelve massless fermions and SU(3) gauge group
• Nonperturbative beta function of eight-flavor SU(3) gauge theory
• Higher-Order Scheme-Independent Series Expansions of ${\gamma }_{\bar{\psi }\psi ,IR}$ and ${\beta }_{IR}^{\prime }$ in Conformal Field Theories
• Scheme-Independent Series Expansions at an Infrared Zero of the Beta Function in Asymptotically Free Gauge Theories
• Crawling technicolor
• Scheme-Independent Calculation of ${\gamma }_{\bar{\psi }\psi ,IR}$ for an SU(3) Gauge Theory
• Strong dynamics, composite Higgs and the conformal window
• A Near-Conformal Composite Higgs Model
• Six Flavor Quark Matter
• Chiral effective theories with a light scalar at one loop
• Large volumes and spectroscopy of walking theories
• Large scale separation and resonances within LHC range from a prototype BSM model
• Lattice studies of the $Sp(4)$ gauge theory with two fundamental and three antisymmetric Dirac fermions
• Large scale separation and hadronic resonances from a new strongly interacting sector
• Anomalous Dimensions of Conformal Baryons
• Calculable mass hierarchies and a light dilaton from gravity duals
• $SU(2)$ Gauge Theory with Two Fundamental Flavours: Scalar and Pseudoscalar Spectrum
• Near-Conformal Dynamics at Large Charge
• Multigrid for Staggered Lattice Fermions
• Dilaton and Massive Hadrons in a Conformal Phase
• Emergent strongly coupled ultraviolet fixed point in four dimensions with 8 Kähler-Dirac fermions
• Distinguishing A Higgs-Like Dilaton Scenario With A Complete Bosonic Effective Field Theory Basis
• Charging the Conformal Window
• Lattice Gauge Theory for Physics Beyond the Standard Model
• Gravitational Waves from Walking Technicolor
• Physics of the Non-Abelian Coulomb Phase: Insights from Padé Approximants
• Into the conformal window: multi-representation gauge theories
• Electroweak interactions and dark baryons in the sextet BSM model with a composite Higgs particle
• Scheme-Independent Calculations of Anomalous Dimensions of Baryon Operators in Conformal Field Theories
• Walking on the Ladder: 125 GeV Technidilaton, or Conformal Higgs -Dedicated to the late Professor Yoichiro Nambu-
• Genuine Dilatons in Gauge Theories
• Anomalous dimensions on the lattice
• Conformal Freeze-In of Dark Matter
• Linear Sigma EFT for Nearly Conformal Gauge Theories
• Hyperscaling violation and Electroweak Symmetry Breaking
• Goldstone Boson Scattering with a Light Composite Scalar
• Towards top-down holographic composite Higgs: minimal coset from maximal supergravity
• Probing the holographic dilaton
• A linear sigma model for multiflavor gauge theories
• A Walking Dilaton Inflation
• The Coulomb branch of N=4 SYM and dilatonic scions in supergravity
• Dilatonic states near holographic phase transitions
• Upper limits on branching ratios of the lepton-flavor-violating decays $\tau \to \ell \gamma \gamma$ and $\tau \to \ell X$
• Sigma-assisted natural composite Higgs
• Discovering walking technirho mesons at the LHC
• A dilaton-pion mass relation
• Walking Technipions in a Holographic Model
• Determination of SU(4)${}_{TC}$ Technicolor Gauge Group from Embedding in Extended Technicolor
• Phase transitions and light scalars in bottom-up holography
• Effective field theory for pions and a dilatonic meson
• Targeting the conformal window with 4+8 flavors
• Walking from 750 GeV to 950 GeV in the Technipion Zoo
• ${\beta }_{IR}^{\prime }$ at an Infrared Fixed Point in Chiral Gauge Theories
• Mass splittings in a linear sigma model for multiflavor gauge theories
• Examining the Low Energy Dynamics of Walking Gauge Theory
• The running coupling of 8 flavors and 3 colors
• 125 GeV Higgs from a chiral-techniquark model
• Dynamical Origin of the Electroweak Scale and the 125 GeV Scalar
• Walking-dilaton hybrid inflation with $B-L$ Higgs embedded in dynamical scalegenesis
• A bound state model for a light scalar
• Gravitational wave footprints from Higgs-portal scalegenesis with multiple dark chiral scalars
• Beyond the Standard Model: Charting Fundamental Interactions via Lattice Simulations
• Dilaton in scalar QFT: a no-go theorem in $4-\epsilon$ and $3-\epsilon$ dimensions
• Fermion mass splitting in the technicolor coupled scenario
• The reactions $\pi \pi \to \pi \pi$ and $\gamma \gamma \to \pi \pi$ in $\chi$PT with an isosinglet scalar resonance
• Mass Splitting in a Linear Sigma Model
• Broken Conformal Window
• Origin of Mass - Horizons Expanding from the Nambu's Theory
• More on the flavor dependence of $m_{\varrho }/f_{\pi }$
• SU(3) gauge theory with four degenerate fundamental fermions on the lattice
• Investigating some technical improvements to glueball calculations
• Scale-Chiral Effective Field Theory for Nuclear Interactions in the Veneziano Limit
• Composite two-Higgs doublet model from dilaton effective field theory
• S-parameter and vector decay constant in QCD with eight fundamental fermions