Weinberg's Compositeness

Abstract

Nearly 60 years ago Weinberg suggested a criterion for particle "compositeness", which has acquired new life with the discovery of new, exotic hadrons. His idea resonates with model-based intuition. I discuss the role it plays in the context of another of Weinberg's creations, the model-independent framework of effective field theories.

arXiv comment19 pages, 1 figure. Prepared for Special Issue of Symmetry on Fundamental Aspects of Theoretical Physics -- Memorial Issue for S. Weinberg

References in corpus (41)

• Observation of a New Narrow Charmonium State in Exclusive B+-->K+ pi+pi- J/psi Decays
• Observation of a narrow charmonium-like state in exclusive B+ -> K+ pi+pi- J/psi decays
• The $XYZ$ states: experimental and theoretical status and perspectives
• A New Expansion for Nucleon-Nucleon Interactions
• Two-Nucleon Systems from Effective Field Theory
• The Two-Nucleon Potential from Chiral Lagrangians
• Nuclear effective field theory: status and perspectives
• Evidence that the a0(980) and f0(980) are not elementary particles
• Effective Field Theory for Short-Range Forces
• Reparameterisation Invariance Constraints on Heavy Particle Effective Field Theories
• Nucleon-Nucleon Effective Field Theory Without Pions
• Low-energy Universality and the New Charmonium Resonance at 3870 MeV
• More Effective Field Theory for Nonrelativistic Scattering
• Pion Interactions in the X(3872)
• Generalized Dimensional Analysis
• Narrow Resonances in Effective Field Theory
• Rearranging Pionless Effective Field Theory
• How short is too short? Constraining zero-range interactions in nucleon-nucleon scattering
• Non-perturbative regularization and renormalization: simple examples from non-relativistic quantum mechanics
• The potential of effective field theory in NN scattering
• On the nature of near-threshold bound and virtual states
• Quartet S Wave Neutron Deuteron Scattering in Effective Field Theory
• Scattering Models for Ultracold Atoms
• Structure of Near-Threshold s-Wave Resonances
• The Dilated Chiral Quark Model
• What is Quantum Field Theory, and What Did We Think It Is?
• Galilean-Invariant XEFT
• Compositeness of S-wave weakly-bound states from next-to-leading order Weinberg's relations
• The Two-Nucleon 1S0 Amplitude Zero in Chiral Effective Field Theory
• Improved convergence of chiral effective field theory for 1S0 of NN scattering
• Naturalness in Nuclear Effective Field Theories
• Nucleon-Nucleon Interaction and Isospin Violation
• Fate of the neutron-deuteron virtual state as an Efimov level
• Narrow resonances and short-range interactions
• Constructing chiral effective field theory around unnatural leading-order interactions
• Generalised Point Interactions for the Radial Schrodinger Equation via Unitary Dilations
• Nonrelativistic Effective Field Theory with a Resonance Field
• Effective Field Theory for Two-Body Systems with Shallow S-Wave Resonances
• Spatial interpretation of "compositeness" for finite-range potentials
• Short-range interactions and narrow resonances in effective field theory
• A toy model for "elementariness"

Cited by in corpus (5)

• Compositeness of $T_{cc}$ and $X(3872)$ by considering decay and coupled-channels effects
• Compositeness of hadrons, nuclei, and atomic systems
• Effective field theory with resonant P-wave interaction
• The $\pi \pi$ scattering amplitude at large $N_{\text{c}}$
• Compositness and wave function of shallow bound states in relation to scattering observables