Effect of heavy particles in low-energy light-particle processes

Journal Article · Mon Oct 15 04:00:00 EDT 1979 · Phys. Rev., D; (United States)

DOI:https://doi.org/10.1103/PhysRevD.20.1982· OSTI ID:5783013

Chan, L H; Hagiwara, T; Ovrut, B

The ''decoupling theorem'' of Appelquist and Carazzone is found not always to be applicable to light-scalar-particle processes in spontaneously broken theories. If the Higgs scalar is considered to be light, then Higgs-scalar processes see the effect of heavy fermions and heavy vector gauge bosons at the one-loop level. If there is more than one scalar multiplet in a spontaneously broken gauge theory, the effect of a heavy Higgs particle in light-scalar-particle processes is significant at the tree level. In the latter case, such an effect can be absorbed completely into an effective phi/sup 4/ coupling constant, lambda/sub eff/, of the light particle provided that lambda/sub eff/ is positive definite.

• Research Organization: Department of Physics, Brandeis University, Waltham, Massachusetts 02154
• OSTI ID: 5783013
• Journal Information: Phys. Rev., D; (United States), Journal Name: Phys. Rev., D; (United States) Vol. 20:8; ISSN PRVDA
• Country of Publication: United States
• Language: English

Related Subjects

645400* -- High Energy Physics-- Field Theory
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BOSONS
COUPLING CONSTANTS
ELEMENTARY PARTICLES
FERMIONS
FIELD THEORIES
HIGGS BOSONS
INFRARED DIVERGENCES
INTERMEDIATE BOSONS
MATHEMATICAL MODELS
PARTICLE MODELS
PHI4-FIELD THEORY
POSTULATED PARTICLES
QUANTUM CHROMODYNAMICS
QUANTUM FIELD THEORY
RENORMALIZATION
SYMMETRY BREAKING
UNIFIED GAUGE MODELS