Iota(1440), anomalous Ward identities, and topological susceptibility for QCD

Journal Article · Sat Nov 01 04:00:00 EST 1986 · Phys. Rev. D; (United States)

DOI:https://doi.org/10.1103/PhysRevD.34.2836· OSTI ID:7104038

Williams, P G

Anomalous Ward identities for QCD are comprehensively analyzed taking into account contributions of all known pseudoscalar mesons, including the iota(1440 MeV) which is a possible glueball candidate. Implications for the standard resolution of the U(1) problem are examined by imposing the important and crucial constraint of positivity for the topological susceptibility. The pure Yang-Mills susceptibility: a quantity relevant in quenched lattice calculations: is shown to increase quite considerably in the presence of the iota, while the total susceptibility is reduced and may even vanish. Allowed ranges for the axial couplings are delineated and two classes of solution emerge: one corresponding to an iota with suppressed singlet axial coupling; the other to a large eta'-like coupling. It may be possible to discriminate between these two alternatives by measurements of the branching ratio for iota..-->..KK-bar..pi..: values near 100% give suppressed couplings; values below 50% unsuppressed ones.

• Research Organization: Physics Department, Queen Mary College, University of London, London E1 4NS England
• OSTI ID: 7104038
• Journal Information: Phys. Rev. D; (United States), Journal Name: Phys. Rev. D; (United States) Vol. 34:9; ISSN PRVDA
• Country of Publication: United States
• Language: English

Related Subjects

645204 -- High Energy Physics-- Particle Interactions & Properties-Theoretical-- Strong Interactions & Properties
645400* -- High Energy Physics-- Field Theory
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
FIELD THEORIES
GLUEBALLS
IOTA-1440 RESONANCES
LIE GROUPS
MONTE CARLO METHOD
PARTICLE IDENTIFICATION
QUANTUM CHROMODYNAMICS
QUANTUM FIELD THEORY
SU GROUPS
SU-3 GROUPS
SYMMETRY GROUPS
U GROUPS
U-1 GROUPS
U-3 GROUPS
WARD IDENTITY