Mesons, glueballs and composite bosons of weak interactions

Thesis/Dissertation · Wed Jan 01 04:00:00 EST 1986

OSTI ID:6316735

Sinha, R

The thesis has two parts. In Part I, they study isoscalar meson mixing and glueballs. They examine the q anti q annihilation for meson mixing with a view to understand, why Q.C.D. gives a positive gluon annihilation amplitude, contrary to positronium which has a negative amplitude due to two photon annihilation. It turns out that this peculiar feature can be explained as a consequence of the confining nature of Q.C.D. They construct a non orthogonal meson mixing model, where the decay rates of the mesons agree with experiments even without considering glueballs. They therefore conclude that the glueballs do not mix much with mesons. The meson masses however, depend very sensitively on the presence of nearby glueballs. They argue, that it is incorrect to expect Gamma(Psi ..-->.. glueball + ..gamma..) to be the dominant radiative decay. Finally they look at some of the glueball candidates and conclude from the coupling of g/sub T/'s to two gluons, that they are indeed glueballs. They are however unable to accommodate the iota as a glueball. In Part II, they examine the possibility of existence of composite bosons of weak interaction. Constraints from the anomalous magnetic moment of the electron are used to determine upper limits on the couplings of the bosons, an entire spectrum of which, may exist, in the composite model. It is found that the coupling of singlet or triplet pseudoscalar to leptons is very small. This explains the V-A nature of weak interactions.

• Research Organization: Rochester Univ., NY (USA)
• OSTI ID: 6316735
• Country of Publication: United States
• Language: English

Related Subjects

645201* -- High Energy Physics-- Particle Interactions & Properties-Theoretical-- General & Scattering Theory
645400 -- High Energy Physics-- Field Theory
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANNIHILATION
BAG MODEL
BASIC INTERACTIONS
BOSONS
COMPOSITE MODELS
CONFIGURATION MIXING
ELECTROMAGNETIC INTERACTIONS
ELEMENTARY PARTICLES
EXTENDED PARTICLE MODEL
FIELD THEORIES
GLUEBALLS
HADRONS
INTERACTIONS
MATHEMATICAL MODELS
MESONS
PARTICLE INTERACTIONS
PARTICLE MODELS
POSTULATED PARTICLES
PREONS
QUANTUM CHROMODYNAMICS
QUANTUM FIELD THEORY
QUARK MODEL
QUARK-QUARK INTERACTIONS
RADIATIVE DECAY
WEAK INTERACTIONS