Evidence for diquarks in lattice QCD

Abstract

Diquarks may play an important role in hadron spectroscopy, baryon decays and color superconductivity. We investigate the existence of diquark correlations in lattice QCD by considering systematically all the lowest energy diquark channels in a color gauge-invariant setup. We measure mass differences between the various channels and show that the positive parity scalar diquark is the lightest. Quark-quark correlations inside the diquark are clearly seen in this channel, and yield a diquark size of order 1 fm.

Version as published in Phys. Rev. Lett.97, 222002,2006; 4 pages, 5 figures

References in corpus (1)

• The nucleon electromagnetic form factors from Lattice QCD

Cited by in corpus (37)

• Heavy quarkonium: progress, puzzles, and opportunities
• Multiquark Resonances
• Exotics: Heavy Pentaquarks and Tetraquarks
• Four-Quark Hadrons: an Updated Review
• Nucleon electromagnetic form factors
• Distribution Functions of the Nucleon and Pion in the Valence Region
• Masses of ground and excited-state hadrons
• Low-lying charmed and charmed-strange baryon states
• Higher Tetraquark Particles
• Are there compact heavy four-quark bound states?
• Analysis of the scalar and axial-vector heavy diquark states with QCD sum rules
• Λ_{c} enhancement from strongly coupled quark-gluon plasma
• Diquark correlations in baryons on the lattice with overlap quarks
• The New Sigma_b multiplet, heavy baryon mass predictions, meson-baryon universality and magnetic moments of Lambda_c and Lambda_b
• Lattice QCD study of four-quark components of the isosinglet scalar mesons: Significance of disconnected diagrams
• Emergent Hadrons and Diquarks
• Diquark effects in light baryon correlators from lattice QCD
• Diquark properties from full QCD lattice simulations
• Heavy baryon spectrum with chiral multiplets of scalar and vector diquarks
• Excitation energy spectra of the Lambda_c and Lambda_b baryons in a finite-size diquark model
• Regge trajectories of Excited Baryons, quark-diquark models and quark-hadron duality
• Four-quark stability
• Wave Functions of the Proton Ground State in the Presence of a Uniform Background Magnetic Field in Lattice QCD
• Quark-diquark potential and diquark mass from Lattice QCD
• Asymptotically conformal CFL quark matter within a nonlocal chiral quark model
• Strong decays of singly heavy baryons from a chiral effective theory of diquarks
• Diquark bound states with a completely crossed ladder truncation
• Chiral effective model of cold and dense two-color QCD: The linear sigma model approach
• Sum rule for the partial decay rates of bottom hadrons based on the dynamical supersymmetry of the $\bar{s}$ quark and the $ud$ diquark
• Building diquark model from Lattice QCD
• Revisiting light-flavor diquarks in the inverse matrix method of QCD sum rules
• Excitation spectra of heavy baryons in diquark models
• Chiral effective theory of scalar and vector diquarks revisited
• The chiral limit of a fermion-scalar $(1/2{)}^{+}$ system in covariant gauges
• Baryon number transfer could delay Quark-Hadron transition in cosmology
• Mass spectrum and magnetic moments of singly-charmed baryons: a quark-diquark model analysis of ${\Omega }_c(3185{)}^0$ and ${\Omega }_c(3327{)}^0$
• Isospin breaking from diquark clustering