Excited State Nucleon Spectrum with Two Flavors of Dynamical Fermions

Abstract

Highly excited states for isospin 1/2 baryons are calculated for the first time using lattice QCD with two flavors of dynamical quarks. Anisotropic lattices are used with two pion masses: 416(36) MeV and 578(29) MeV. The lowest four energies are reported in each of the six irreducible representations of the octahedral group at each pion mass. The lattices used have dimensions 24^3x64, spatial lattice spacing a_s = 0.11 fm and temporal lattice spacing a_t = 1/3 a_s. Clear evidence is found for a 5/2^-state in the pattern of negative-parity excited states. This agrees with the pattern of physical states and spin 5/2 has been realized for the first time on the lattice.

arXiv comment21 pages, 12 figures

References in corpus (31)

• The glueball spectrum from an anisotropic lattice study
• The Chroma Software System for Lattice QCD
• Analytic Smearing of SU(3) Link Variables in Lattice QCD
• Non-perturbative O(a) improvement of lattice QCD
• Light hadrons with improved staggered quarks: approaching the continuum limit
• First results from 2+1 dynamical quark flavors on an anisotropic lattice: light-hadron spectroscopy and setting the strange-quark mass
• Dynamical coupled-channel model of meson production reactions in the nucleon resonance region
• Charmonium excited state spectrum in lattice QCD
• Tuning for Three-flavors of Anisotropic Clover Fermions with Stout-link Smearing
• Testing and tuning symplectic integrators for Hybrid Monte Carlo algorithm in lattice QCD
• Speeding up Lattice QCD simulations with clover-improved Wilson Fermions
• The Anisotropic Wilson Gauge Action
• A Lattice Study of the Nucleon Excited States with Domain Wall Fermions
• Charmonium Spectrum from Quenched Anisotropic Lattice QCD
• Heavy Quarks on Anisotropic Lattices: The Charmonium Spectrum
• Excited hadrons on the lattice: Baryons
• Roper Resonance and S_{11}(1535) from Lattice QCD
• Clebsch-Gordan Construction of Lattice Interpolating Fields for Excited Baryons
• Group-theoretical construction of extended baryon operators in lattice QCD
• Lattice QCD determination of patterns of excited baryon states
• Chronological Inversion Method for the Dirac Matrix in Hybrid Monte Carlo
• Spectral Analysis of Excited Nucleons in Lattice QCD with Maximum Entropy Method
• Non-Perturbative Improvement of the Anisotropic Wilson QCD Action
• Baryon Spectroscopy in Lattice QCD
• Excited Baryon Spectroscopy from Lattice QCD: Finite Size Effect and Hyperfine Mass Splitting
• Dynamical QCD simulations on anisotropic lattices
• Extracting excited states from lattice QCD: the Roper resonance
• Multiparticle States and the Hadron Spectrum on the Lattice
• Study of nucleon resonances with electromagnetic interactions
• Two flavors of dynamical quarks on anisotropic lattices
• Quantum Operator Design for Lattice Baryon Spectroscopy

Cited by in corpus (55)

• Pentaquark and Tetraquark states
• Solving Lattice QCD systems of equations using mixed precision solvers on GPUs
• QCD and strongly coupled gauge theories: challenges and perspectives
• Baryon spectroscopy
• Excited state baryon spectroscopy from lattice QCD
• On the generalized eigenvalue method for energies and matrix elements in lattice field theory
• A novel quark-field creation operator construction for hadronic physics in lattice QCD
• Scattering processes and resonances from lattice QCD
• Toward the excited meson spectrum of dynamical QCD
• Three particles in a finite volume
• Improved stochastic estimation of quark propagation with Laplacian Heaviside smearing in lattice QCD
• The Flavor Structure of the Excited Baryon Spectra from Lattice QCD
• Nuclear Physics from Lattice QCD
• Adaptive multigrid algorithm for the lattice Wilson-Dirac operator
• QCD with Two Light Dynamical Chirally Improved Quarks: Baryons
• $I=1$ and $I=2$ $\pi -\pi$ scattering phase shifts from $N_{\mathrm{f}}=2+1$ lattice QCD
• Meson and baryon spectrum for QCD with two light dynamical quarks
• The I=2 pipi S-wave Scattering Phase Shift from Lattice QCD
• Twenty-first Century Lattice Gauge Theory: Results from the QCD Lagrangian
• Nucleon, $\Delta$ and $\Omega$ excited states in $N_f=2+1$ lattice QCD
• Roper Resonance in 2+1 Flavor QCD
• Exploring strange nucleon form factors on the lattice
• Extended hadron and two-hadron operators of definite momentum for spectrum calculations in lattice QCD
• Excited-state spectroscopy of triply-bottom baryons from lattice QCD
• Structure and Flow of the Nucleon Eigenstates in Lattice QCD
• Controlling Excited-State Contamination in Nucleon Matrix Elements
• High Statistics Analysis using Anisotropic Clover Lattices: (IV) Volume Dependence of Light Hadron Masses
• A variational study of two-nucleon systems with lattice QCD
• Volume Dependence of Bound States with Angular Momentum
• Non-relativistic bound states in a finite volume
• S-wave scattering of strangeness -3 baryons
• Low-lying Odd-parity States of the Nucleon in Lattice QCD
• Positive-parity Excited-states of the Nucleon in Quenched Lattice QCD
• Time Dependence of Nucleon Correlation Functions in Chiral Perturbation Theory
• Ordering of Spin-$\frac{1}{2}$ Excitations of the Nucleon in Lattice QCD
• Separated Structure Functions for Exclusive $K^{+}\Lambda$ and $K^{+}{\Sigma }^0$ Electroproduction at 5.5 GeV with CLAS
• Low-lying $\Lambda$ Baryons with spin 1/2 in Two-flavor Lattice QCD
• The Positive-Parity Baryon Spectrum and the Role of Hybrid Baryons
• QCD and the Hagedorn spectrum
• Searching for low-lying multi-particle thresholds in lattice spectroscopy
• The Dichotomous Nucleon: Some Radical Conjectures for the Large Nc Limit
• Higgs and W boson spectrum from lattice simulations
• Extraction of the resonance parameters at finite times
• Hadron Structure in Lattice QCD
• Baryon spin-flavor structure from an analysis of lattice QCD results of the baryon spectrum
• Exploring the Spectrum of QCD using the Lattice
• $\Lambda (1405)$ from lattice QCD
• Screening masses in quenched (2+1)d Yang-Mills theory: universality from dynamics?
• Meson Production and Baryon Resonances at CLAS
• Including Tetraquark Operators in the Low-Lying Scalar Meson Sectors in Lattice QCD
• Excited states in lattice QCD with the stochastic LapH method
• Excited States of the Nucleon in 2+1 Flavor QCD
• Nucleon, Delta and Omega excited state spectra at three pion mass values
• Gauge Field Generation on Large-Scale GPU-Enabled Systems
• $N^{\ast }$ Resonances in Lattice QCD from (mostly) Low to (sometimes) High Virtualities