Hybrid Baryons in QCD

Abstract

We present the first comprehensive study of hybrid baryons using lattice QCD methods. Using a large basis of composite QCD interpolating fields we extract an extensive spectrum of baryon states and isolate those of hybrid character using their relatively large overlap onto operators which sample gluonic excitations. We consider the spectrum of Nucleon and Delta states at several quark masses finding a set of positive parity hybrid baryons with quantum numbers N_1/2+, N_1/2+, N_3/2+, N_3/2+, N_5/2+ and Delta_1/2+, Delta_3/2+ at an energy scale above the first band of `conventional' excited positive parity baryons. This pattern of states is compatible with a color octet gluonic excitation having J^P=1+ as previously reported in the hybrid meson sector and with a comparable energy scale for the excitation, suggesting a common bound-state construction for hybrid mesons and baryons.

References in corpus (12)

• 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
• Toward the excited meson spectrum of dynamical QCD
• First results from 2+1 dynamical quark flavors on an anisotropic lattice: light-hadron spectroscopy and setting the strange-quark mass
• The Experimental Status of Glueballs
• Isoscalar meson spectroscopy from lattice QCD
• Charmonium excited state spectrum in lattice QCD
• Tuning for Three-flavors of Anisotropic Clover Fermions with Stout-link Smearing
• The lightest hybrid meson supermultiplet in QCD
• Exotic and excited-state radiative transitions in charmonium from lattice QCD
• First Lattice Study of the $N$-$P_{11}(1440)$ Transition Form Factors

Cited by in corpus (68)

• QCD and strongly coupled gauge theories: challenges and perspectives
• Baryons as relativistic three-quark bound states
• Physics Opportunities with the 12 GeV Upgrade at Jefferson Lab
• Scattering processes and resonances from lattice QCD
• Explanation and Prediction of Observables using Continuum Strong QCD
• Excited and exotic charmonium spectroscopy from lattice QCD
• Progress Toward Understanding Baryon Resonances
• Studies of Nucleon Resonance Structure in Exclusive Meson Electroproduction
• Energy dependence of the ρ resonance in ππ elastic scattering from lattice QCD
• Hybrid Mesons
• 50 Years of Quantum Chromodynamics
• S and D-wave phase shifts in isospin-2 pi pi scattering from lattice QCD
• Toward the excited isoscalar meson spectrum from lattice QCD
• The Flavor Structure of the Excited Baryon Spectra from Lattice QCD
• Resonances in coupled $\pi K,\eta K$ scattering from lattice QCD
• The three-gluon vertex in Landau gauge
• An $a_0$ resonance in strongly coupled $\pi \eta$, $K\overline{K}$ scattering from lattice QCD
• A study of the $P_{11}(1440)$ and $D_{13}(1520)$ resonances from CLAS data on $ep\to e^{\prime }{\pi }^{+}{\pi }^{-}{p}^{\prime }$
• Isoscalar $\pi \pi ,K\overline{K},\eta \eta$ scattering and the $\sigma ,f_0,f_2$ mesons from QCD
• Excited and exotic charmonium, $D_s$ and $D$ meson spectra for two light quark masses from lattice QCD
• Excited spectroscopy of charmed mesons from lattice QCD
• High statistics study of the reaction $\gamma p\to p{\pi }^0\eta$
• Spectroscopy of doubly-charmed baryons from lattice QCD
• Spectroscopy of triply-charmed baryons from lattice QCD
• Decays of an exotic $1^{-+}$ hybrid meson resonance in QCD
• Hadrons and Nuclei
• Light Baryon Spectroscopy
• Multi-particle systems on the lattice and chiral extrapolations: a brief review
• Structure of the Roper Resonance from Lattice QCD Constraints
• A variational study of two-nucleon systems with lattice QCD
• Evidence for the $N^{\prime }(1720)3/2^{+}$ Nucleon Resonance from Combined Studies of CLAS ${\pi }^{+}{\pi }^{-}p$ Photo- and Electroproduction Data
• Jülich-Bonn-Washington Model for Pion Electroproduction Multipoles
• First results on nucleon resonance photocouplings from the $\gamma p\to {\pi }^{+}{\pi }^{-}p$ reaction
• P-wave nucleon-pion scattering amplitude in the $\Delta (1232)$ channel from lattice QCD
• Nuclear Reactions from Lattice QCD
• Excited and exotic bottomonium spectroscopy from lattice QCD
• Separated Structure Functions for Exclusive $K^{+}\Lambda$ and $K^{+}{\Sigma }^0$ Electroproduction at 5.5 GeV with CLAS
• Elastic Form Factors of Nucleon Excitations in Lattice QCD
• Towards Unpolarized GPDs from Pseudo-Distributions
• Distillation at High-Momentum
• Nucleon Resonance Structure from Exclusive Meson Electroproduction with CLAS
• Decay constants of the pion and its excitations on the lattice
• The Positive-Parity Baryon Spectrum and the Role of Hybrid Baryons
• Controlling Excited-State Contributions with Distillation in Lattice QCD Calculations of Nucleon Isovector Charges $g_S^{u-d}$, $g_A^{u-d}$, $g_T^{u-d}$
• N* Experiments and their Impact on Strong QCD Physics
• Non-singlet quark helicity PDFs of the nucleon from pseudo-distributions
• Strange Hadron Spectroscopy with Secondary KL Beam in Hall D
• Theory introduction to baryon spectroscopy
• Excited states in nucleon structure calculations
• Nucleon Resonance Physics
• Role of chiral symmetry in the nucleon excitation spectrum
• Updates on the Studies of $N^{\ast }$ Structure with CLAS and the Prospects with CLAS12
• Coloured loops in 4D and their effective field representation
• Highly excited $B$, $B_s$ and $B_c$ meson spectroscopy from lattice QCD
• Spectrum and Structure of Excited Baryons with CLAS
• Elastic Nucleon-Pion scattering amplitudes in the $\Delta$ channel at physical pion mass from Lattice QCD
• Excited-state effects in nucleon structure on the lattice using hybrid interpolators
• Study of excited nucleons and their structure
• Recent progress on hadron spectroscopy from lattice QCD
• A quark core-gluon model for heavy hybrid baryons
• BPS center vortices in nonrelativistic SU(N) gauge models with adjoint Higgs fields
• Theoretical results for hadronic masses and their widths in the framework of the SO(4) model
• Why is GeV physics relevant in the age of the LHC?
• Towards High-Precision Parton Distributions From Lattice QCD via Distillation
• Formal Developments for Lattice QCD with Applications to Hadronic Systems
• $N^{\ast }$ Resonances in Lattice QCD from (mostly) Low to (sometimes) High Virtualities
• Accessing the Gluon Momentum Fraction of Nucleons through the Gradient Flow
• Unpolarized gluon distribution in the nucleon from lattice quantum chromodynamics