113 citations · 311 across the 17 of their papers we have counts for
18 papers
Pion Transition Form Factor from Twisted-Mass Lattice QCD and the Hadronic Light-by-Light -pole Contribution to the Muon
C. Alexandrou, S. Bacchio, G. Bergner +14
The neutral pion generates the leading pole contribution to the hadronic light-by-light tensor, which is given in terms of the nonperturbative transition form factor $\mathcal{F}_{…
Light Scalar Meson and Decay Constant in SU(3) Gauge Theory with Eight Dynamical Flavors
Lattice Strong Dynamics Collaboration, R. C. Brower, E. Owen +15
The SU(3) gauge theory with nearly massless Dirac fermions has long been of theoretical and phenomenological interest due to the near-conformality arising from its proximit…
Hidden Conformal Symmetry from the Lattice
LSD Collaboration, T. Appelquist, R. C. Brower +14
We analyze newly expanded and refined data from lattice studies of an SU(3) gauge theory with eight Dirac fermions in the fundamental representation. We focus on the light composit…
Pseudoscalar-pole contributions to the muon at the physical point
Sebastian Burri, Gurtej Kanwar, Constantia Alexandrou +14
Pseudoscalar-pole diagrams are an important component of estimates of the hadronic light-by-light (HLbL) contribution to the muon . We report on our computation of the transit…
Pion-pole contribution to HLbL from twisted mass lattice QCD at the physical point
Sebastian Burri, Constantia Alexandrou, Simone Bacchio +13
We report on our computation of the pion transition form factor from twisted mass lattice QCD in order to determine the numerically dominant light…
Quark and gluon momentum fractions in the pion from lattice QCD
Constantia Alexandrou, Simone Bacchio, Georg Bergner +11
We perform the first full decomposition of the pion momentum into its gluon and quark contributions. We employ an ensemble generated by the Extended Twisted Mass Collaboration with…
Goldstone Boson Scattering with a Light Composite Scalar
T. Appelquist, R. C. Brower, K. K. Cushman +14
The appearance of a light composite scalar resonance in nearly conformal gauge-fermion theories motivates further study of the low energy structure of these theories. To this…
Near-conformal dynamics in a chirally broken system
Thomas Appelquist, Richard C. Brower, Kimmy K. Cushman +11
Composite Higgs models must exhibit very different dynamics from quantum chromodynamics (QCD) regardless whether they describe the Higgs boson as a dilatonlike state or a pseudo-Na…
Radial Lattice Quantization of 3D Field Theory
Richard C. Brower, George T. Fleming, Andrew D. Gasbarro +4
The quantum extension of classical finite elements, referred to as quantum finite elements ({\bf QFE})~\cite{Brower:2018szu,Brower:2016vsl}, is applied to the radial quantization o…
Stealth dark matter confinement transition and gravitational waves
R. C. Brower, K. Cushman, G. T. Fleming +11
We use non-perturbative lattice calculations to investigate the finite-temperature confinement transition of stealth dark matter, focusing on the regime in which this early-univers…
Studies of Conformal Behavior in Strongly Interacting Quantum Field Theories
Andrew David Gasbarro
In this dissertation, we present work towards characterizing various conformal and nearly conformal quantum field theories nonperturbatively using a combination of numerical and an…
Linear Sigma EFT for Nearly Conformal Gauge Theories
T. Appelquist, R. C. Brower, G. T. Fleming +11
We construct a generalized linear sigma model as an effective field theory (EFT) to describe nearly conformal gauge theories at low energies. The work is motivated by recent lattic…
Nonperturbative investigations of SU(3) gauge theory with eight dynamical flavors
Lattice Strong Dynamics, Collaboration, : +14
We present our lattice studies of SU(3) gauge theory with = 8 degenerate fermions in the fundamental representation. Using nHYP-smeared staggered fermions we study finite-tem…
Lattice Field Theory on Riemann Manifolds: Numerical Tests for the 2-d Ising CFT on
Richard C. Brower, Michael Cheng, George T. Fleming +4
We present a method for defining a lattice realization of the quantum field theory on a simplicial complex in order to enable numerical computation on a general Riemann manif…
Can a Linear Sigma Model Describe Walking Gauge Theories at Low Energies?
Andrew Gasbarro
In recent years, many investigations of confining Yang Mills gauge theories near the edge of the conformal window have been carried out using lattice techniques. These studies have…
Examining the Low Energy Dynamics of Walking Gauge Theory
Andrew D. Gasbarro, George T. Fleming
We report on an investigation into the low energy dynamics of walking gauge theory. Taking Yang Mills with eight flavors of fundamental fermions as an example, we discuss t…
Lattice Dirac Fermions on a Simplicial Riemannian Manifold
Richard C. Brower, George T. Fleming, Andrew D. Gasbarro +3
The lattice Dirac equation is formulated on a simplicial complex which approximates a smooth Riemann manifold by introducing a lattice vierbein on each site and a lattice spin conn…
Quantum Finite Elements for Lattice Field Theory
Richard C. Brower, George Fleming, Andrew Gasbarro +3
Viable non-perturbative methods for lattice quantum field theories on curved manifolds are difficult. By adapting features from the traditional finite element methods (FEM) and Reg…