94 citations · 446 across the 16 of their papers we have counts for
15 papers · 1 filter
Investigating the role of tetraquark operators in lattice QCD studies of the and resonances
Andrew D. Hanlon, Daniel Darvish, Sarah Skinner +7
The role of tetraquark operators in studying the isodoublet strange and isovector nonstrange scalar mesons in lattice QCD is examined using an ensemble with $m_π\app…
The spectrum of qubitized QCD: glueballs in a gauge theory
Andrei Alexandru, Paulo F. Bedaque, Ruairí Brett +1
Quantum simulations of QCD require digitization of the infinite-dimensional gluon field. Schemes for doing this with the minimum amount of qubits are desirable. We present a practi…
Higher order quantization conditions for two spinless particles
Frank X. Lee, Andrei Alexandru, Ruairí Brett
Lattice QCD calculations of scattering phaseshifts and resonance parameters in the two-body sector are becoming precision studies. Early calculations employed Lüscher's formula for…
Three-body dynamics of the resonance from lattice QCD
Maxim Mai, Andrei Alexandru, Ruairí Brett +4
Resonant hadronic systems often exhibit a complicated decay pattern in which three-body dynamics play a relevant or even dominant role. In this work we focus on the res…
Higher order finite volume quantization conditions for two spinless particles
Frank X. Lee, Andrei Alexandru, Ruairí Brett
Lattice QCD calculations of scattering phaseshifts and resonance parameters in the two-body sector are becoming precision studies. Early calculations employed Lüscher's formula for…
Three-body interactions from the finite-volume QCD spectrum
Ruairí Brett, Chris Culver, Maxim Mai +3
We perform a fit of the finite-volume QCD spectrum of three pions at maximal isospin to constrain the three-body force. We use the unitarity-based relativistic three-particle quant…
Finite-volume energy spectrum of the system
Andrei Alexandru, Ruairí Brett, Chris Culver +4
The dynamics of multi-kaon systems are of relevance for several areas of nuclear physics. However, even the simplest systems, two and three kaons, are hard to prepare and study exp…
Setting the scale for nHYP fermions with the Lüscher-Weisz gauge action
Hossein Niyazi, Andrei Alexandru, Frank X. Lee +1
Lattice QCD calculations using gauge smearing for fermion kernels are computationally efficient. Hypercubic blocking (nHYP smearing) has been shown to reduce scaling errors. In thi…
Three pion spectrum in the channel from lattice QCD
Chris Culver, Maxim Mai, Ruairí Brett +2
Three-body states are critical to the dynamics of many hadronic resonances. We show that lattice QCD calculations have reached a stage where these states can be accurately resolved…
Including Tetraquark Operators in the Low-Lying Scalar Meson Sectors in Lattice QCD
Daniel Darvish, Ruairí Brett, John Bulava +4
Lattice QCD allows us to probe the low-lying hadron spectrum in finite-volume using a basis of single- and multi-hadron interpolating operators. Here we examine the effect of inclu…
Spectroscopy From The Lattice: The Scalar Glueball
Ruairí Brett, John Bulava, Daniel Darvish +4
Lattice calculations allow us to probe the low-lying, non-perturbative spectrum of QCD using first principles numerical methods. Here we present the low-lying spectrum in the scala…
Scattering phase shift determinations from a two-scalar field theory
Daniel Darvish, Ruairí Brett, John Bulava +3
A field theory involving two interacting scalar fields, previously studied by Rummukainen and Gottlieb, is revisited. Our study is not restricted to the limit of large quartic coup…
scattering and excited meson spectroscopy using the stochastic LapH method
Ruairí Brett, John Bulava, Jacob Fallica +3
Elastic , - and -wave scattering amplitudes are simultaneously calculated using a Lüscher style analysis on a single ensemble of dynamical Wilson-clover fermions…
Scattering from finite-volume energies including higher partial waves and multiple decay channels
Ruairí Brett, John Bulava, Jacob Fallica +4
A new implementation of estimating the two-to-two -matrix from finite-volume energies based on the Luescher formalism is described. The method includes higher partial waves and…
Estimating the two-particle -matrix for multiple partial waves and decay channels from finite-volume energies
Colin Morningstar, John Bulava, Bijit Singha +4
An implementation of estimating the two-to-two -matrix from finite-volume energies based on the Lüscher formalism and involving a Hermitian matrix known as the "box matrix" is d…