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19952026
most citedThe NANOGrav 15-year Data Set: Evidence for a Gravitational-Wave Background

1.5k citations

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102 papers · 1 filter

hep-lat2018★ 2 cited

Is SU(3) gauge theory with 13 massless flavors conformal?

Zoltan Fodor, Kieran Holland, Julius Kuti +2

We use lattice simulations to study SU(3) gauge theory with 13 massless fermions in the fundamental representation. We present evidence that the theory is conformal with a non-zero…

hep-lat2017★ 38 cited

The twelve-flavor -function and dilaton tests of the sextet scalar

Zoltan Fodor, Kieran Holland, Julius Kuti +2

We discuss near-conformal gauge theories beyond the standard model (BSM) where interesting results on the twelve-flavor -function of massless fermions in the fundamental represe…

hep-lat2017★ 6 cited

Spectroscopy of the BSM sextet model

Zoltan Fodor, Kieran Holland, Julius Kuti +2

As part of our ongoing lattice study of SU(3) gauge theory with two flavors of fermions in the two-index symmetric representation (the sextet model), we present the current status…

hep-lat2017★ 16 cited

A new method for the beta function in the chiral symmetry broken phase

Zoltan Fodor, Kieran Holland, Julius Kuti +2

We describe a new method to determine non-perturbatively the beta function of a gauge theory using lattice simulations in the p-regime of the theory. This complements alternative m…

hep-lat2017

Weakly coupled conformal gauge theories on the lattice

Zoltan Fodor, Kieran Holland, Julius Kuti +2

Results are reported for the beta-function of weakly coupled conformal gauge theories on the lattice, SU(3) with Nf=14 fundamental and Nf=3 sextet fermions. The models are chosen t…

hep-lat2017★ 37 cited

Extended investigation of the twelve-flavor -function

Zoltan Fodor, Kieran Holland, Julius Kuti +2

We report new results from high precision analysis of an important BSM gauge theory with twelve massless fermion flavors in the fundamental representation of the SU(3) color gauge…

hep-lat2016★ 58 cited

Fate of the conformal fixed point with twelve massless fermions and SU(3) gauge group

Zoltan Fodor, Kieran Holland, Julius Kuti +3

We report new results on the conformal properties of an important strongly coupled gauge theory, a building block of composite Higgs models beyond the Standard Model. With twelve m…

hep-lat2016★ 2 cited

Status of a minimal composite Higgs theory

Zoltan Fodor, Kieran Holland, Julius Kuti +3

We analyze three sets of gauge ensembles in our extended physics program of a particularly important BSM gauge theory with a fermion doublet in the two-index symmetric (sextet) rep…

hep-lat2016★ 6 cited

New approach to the Dirac spectral density in lattice gauge theory applications

Zoltan Fodor, Kieran Holland, Julius Kuti +3

We report tests and results from a new approach to the spectral density and the mode number distribution of the Dirac operator in lattice gauge theories. The algorithm generates th…

hep-lat2016★ 118 cited

and scattering phase shifts from lattice QCD

John Bulava, Brendan Fahy, Ben Hörz +3

The -wave and -wave elastic - scattering amplitudes are calculated from a first-principles lattice QCD simulation using a single ensemble of gauge field con…

hep-lat2016★ 5 cited

An Improved Single-Plaquette Gauge Action

Debasish Banerjee, Michael Bögli, Kieran Holland +4

We describe and test a nonperturbatively improved single-plaquette lattice action for 4-d SU(2) and SU(3) pure gauge theory, which suppresses large fluctuations of the plaquette, w…

hep-lat2015★ 3 cited

Pion-pion scattering and the timelike pion form factor from lattice QCD simulations using the stochastic LapH method

John Bulava, Ben Hörz, Brendan Fahy +3

We report on progress applying the stochastic LapH method to estimate all-to-all propagators required in correlation functions of multi-hadron operators relevant for pion-pion scat…

hep-lat2015

Running coupling of the sextet composite Higgs model

Zoltan Fodor, Kieran Holland, Julius Kuti +3

The scale-dependent renormalized coupling of SU(3) gauge theory coupled to Nf = 2 flavors of massless Dirac flavors in the sextet representation is presented in the range 0 < g^2 <…

hep-lat2015★ 5 cited

The running coupling of the minimal sextet composite Higgs model

Zoltan Fodor, Kieran Holland, Julius Kuti +3

We compute the renormalized running coupling of SU(3) gauge theory coupled to N_f = 2 flavors of massless Dirac fermions in the 2-index-symmetric (sextet) representation. This mode…

hep-lat2014★ 106 cited

The lattice gradient flow at tree-level and its improvement

Zoltan Fodor, Kieran Holland, Julius Kuti +3

The Yang-Mills gradient flow and the observable E(t), defined by the square of the field strength tensor at t>0, are calculated at finite lattice spacing and tree-level in the gaug…

hep-lat2014★ 10 cited

Can a light Higgs impostor hide in composite gauge models?

Zoltan Fodor, Kieran Holland, Julius Kuti +2

The frequently discussed strongly interacting gauge theory with a fermion flavor doublet in the two-index symmetric (sextet) representation of the SU(3) color gauge group is invest…

hep-lat2014★ 5 cited

The chiral condensate from the Dirac spectrum in BSM gauge theories

Zoltan Fodor, Kieran Holland, Julius Kuti +2

The eigenvalues of the Dirac operator at finite volume encode whether or not chiral symmetry is spontaneously broken in a massless theory. We apply this framework in a particular B…

hep-lat2014★ 1 cited

Excited states in lattice QCD with the stochastic LapH method

John Bulava, Brendan Fahy, Justin Foley +5

Progress in computing the spectrum of excited baryons and mesons in lattice QCD is described. Results in the zero-momentum bosonic I=1/2, S=1, T1u symmetry sector of QCD using a co…

hep-lat2013★ 5 cited

Update on the 2+1+1 flavor QCD equation of state with HISQ

A. Bazavov, C. Bernard, C. DeTar +11

We present recent results on the QCD equation of state with 2+1+1 flavors of highly improved staggered quarks (HISQ). We focus on three sets of ensembles with temporal extent 6, 8…

hep-lat2013★ 5 cited

Symanzik flow on HISQ ensembles

The MILC Collaboration, A. Bazavov, C. Bernard +13

We report on a scale determination with gradient-flow techniques on the HISQ ensembles generated by the MILC collaboration. The lattice scale , originally…

hep-lat2013★ 64 cited

Extended hadron and two-hadron operators of definite momentum for spectrum calculations in lattice QCD

C. Morningstar, J. Bulava, B. Fahy +5

Multi-hadron operators are crucial for reliably extracting the masses of excited states lying above multi-hadron thresholds in lattice QCD Monte Carlo calculations. The constructio…

hep-lat2012★ 321 cited

Lattice QCD ensembles with four flavors of highly improved staggered quarks

The MILC Collaboration, A. Bazavov, C. Bernard +13

We present results from our simulations of quantum chromodynamics (QCD) with four flavors of quarks: u, d, s, and c. These simulations are performed with a one-loop Symanzik improv…

hep-lat2012★ 117 cited

Can the nearly conformal sextet gauge model hide the Higgs impostor?

Zoltán Fodor, Kieran Holland, Julius Kuti +3

New results are reported from large scale lattice simulations of a frequently discussed strongly interacting gauge theory with a fermion flavor doublet in the two-index symmetric (…

hep-lat2012★ 34 cited

Neutral B-meson mixing from three-flavor lattice QCD: Determination of the SU(3)-breaking ratio ξ

A. Bazavov, C. Bernard, C. M. Bouchard +20

We study SU(3)-breaking effects in the neutral B_d-\bar B_d and B_s-\bar B_s systems with unquenched N_f=2+1 lattice QCD. We calculate the relevant matrix elements on the MILC coll…