Constraints from the Drell-Hearn-Gerasimov sum rule in chiral models of composite fermions

Journal Article · Fri Apr 01 04:00:00 EST 1988 · Phys. Rev. D; (United States)

DOI:https://doi.org/10.1103/PhysRevD.37.2015· OSTI ID:5375536

Jaffe, R L; Ryzak, Z

We analyze a dispersion relation for a spin-flip Compton amplitude in a chiral model of composite quarks and leptons. We discuss the asymptotic behavior of the amplitude and show under what conditions the Drell-Hearn-Gerasimov sum rule holds. Using a small-mass expansion we derive a consistency condition that relates the photoproduction cross sections for different helicities. We show that this condition suggests the existence of higher-spin excited fermions, as well as relations among a priori independent photoproduction amplitudes.

• Research Organization: Center for Theoretical Physics, Laboratory for Nuclear Science dge, Massachusetts 02139
• OSTI ID: 5375536
• Journal Information: Phys. Rev. D; (United States), Journal Name: Phys. Rev. D; (United States) Vol. 37:7; ISSN PRVDA
• Country of Publication: United States
• Language: English

Related Subjects

645300* -- High Energy Physics-- Particle Invariance Principles & Symmetries
645400 -- High Energy Physics-- Field Theory
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BASIC INTERACTIONS
CHIRAL SYMMETRY
COMPOSITE MODELS
DISPERSION RELATIONS
ELECTROMAGNETIC INTERACTIONS
ELEMENTARY PARTICLES
FERMIONS
INTERACTIONS
LEPTONS
MATHEMATICAL MODELS
PARTICLE MODELS
PARTICLE PRODUCTION
PHOTOPRODUCTION
POSTULATED PARTICLES
QUARKS
SYMMETRY