257 citations · 310 across the 12 of their papers we have counts for
12 papers · 1 filter
The excited hadron spectrum in lattice QCD using a new method of estimating quark propagation
C. Morningstar, A. Bell, J. Bulava +7
Progress in determining the spectrum of excited baryons and mesons in lattice QCD is described. Large sets of carefully-designed hadron operators have been studied and their effect…
Excited-Nucleon Spectroscopy with 2+1 Fermion Flavors
Saul Cohen, John M. Bulava, Justin Foley +10
We present progress made by the Hadron Spectrum Collaboration (HSC) in determining the tower of excited nucleon states using 2+1-flavor anisotropic clover lattices. The HSC has bee…
First results from 2+1 dynamical quark flavors on an anisotropic lattice: light-hadron spectroscopy and setting the strange-quark mass
Huey-Wen Lin, Saul D. Cohen, Jozef Dudek +12
We present the first light-hadron spectroscopy on a set of dynamical, anisotropic lattices. A convenient set of coordinates that parameterize the two-dimensional plane of…
Group Theoretical Construction of Nucleon Operators using All-to-All Quark Propagators
R. G. Edwards, G. T. Fleming, B. Joo +5
We describe a method to construct irreducible baryon operators using all-to-all quark propagators. It was demonstrated earlier that a large basis of extended baryon operators on an…
Hadronic Resonances from Lattice QCD
John Bulava, Robert Edwards, George Fleming +6
The determination of the pattern of hadronic resonances as predicted by Quantum Chromodynamics requires the use of non-perturbative techniques. Lattice QCD has emerged as the domin…
Light baryon spectrum using improved interpolating operators
Lattice Hadron Physics Collaboration, S. Basak, R. G. Edwards +6
Energies for excited light baryons are computed in quenched QCD with a pion mass of 490 MeV. Operators used in the simulations include local operators and the simplest nonlocal ope…
Towards a determination of the spectrum of QCD using a space-time lattice
K. J. Juge, A. Lichtl, C. Morningstar +6
Progress by the Lattice Hadron Physics Collaboration in determining the baryon and meson resonance spectrum of QCD using Monte Carlo methods with space-time lattices is described.…
Group-theoretical construction of extended baryon operators
S. Basak, R. Edwards, R. Fiebig +6
The design and implementation of large sets of spatially extended baryon operators for use in lattice simulations are described. The operators are constructed to maximize overlaps…
Baryonic sources using irreducible representations of the double-covered octahedral group
LHP Collaboration, S. Basak, R. Edwards +7
Irreducible representations (IRs) of the double-covered octahedral group are used to construct lattice source and sink operators for three-quark baryons. The goal is to achieve a g…
Baryon operators and spectroscopy in lattice QCD
LHP Collaboration, S. Basak, R. Edwards +7
The construction of the operators and correlators required to determine the excited baryon spectrum is presented, with the aim of exploring the spatial and spin structure of the st…
Mass spectrum of N* and source optimization
LHP Collaboration, S. Basak, R. Edwards +7
We have computed correlation functions for nucleons and extracted the masses for positive- and negative-parities. Use of group theory plays an important role in obtaining sources t…
Baryonic Operators for Lattice Simulations
LHP Collaboration, R. Edwards, R. Fiebig +6
The construction of baryonic operators for determining the N* excitation spectrum is discussed. The operators are designed with one eye towards maximizing overlaps with the low-lyi…