Investigations pertaining to the quantum corrections of the Standard Model and some of its generalizations

Thesis/Dissertation · Sun Jan 01 04:00:00 EST 1989

OSTI ID:5555708

Degrassi, G

The definition of the renormalized electroweak angle, {theta}{sub W}, is briefly reviewed in the context of the Standard Model of the electroweak interactions. The radiative parameters {Delta}r, relevant to muon decay in thee renormalization scheme where sin{sup 2}{theta}{sub W} {equivalent to} 1 {minus} m{sub W}{sup 2}/m{sub Z}{sup 2},{rho}{sub NC}{sup ({nu};t)} and {kappa}{sup ({nu};t)} (q{sup 2}) (t = 1,h), relevant to neutrino scattering in the same scheme, are briefly discussed with particular emphasis on the comparison between theory and experiments. The gauge properties of {Delta}{sup ({nu};t)} (q{sup 2}) {equivalent to} 1 {minus} {kappa}{sup ({nu};t)} (q{sup 2}) are investigated. It is shown that {Delta}{sup ({nu};t)} (q{sup 2}) can be separated into two finite and gauge invariant parts. One part, {Delta}{sup ({nu})} (q{sup 2}), is target independent and the associated function f(q{sup 2}) {equivalent to} {minus}q{sup 2}{Delta}{sup ({nu})}(q{sup 2})/2m{sub W}{sup 2} can be interpreted as an effective electro-magnetic form factor of the neutrino in the framework of the low energy theory derived from the Standard Model at mass scale {much lt} m{sub W}{sup 2}. The observability of this quantity and its dependence on the top quark mass and the neutrino flavor are discussed. With the aim of searching for signals of new physics the implementation of the radiative corrections in a class of SU(2){sub L}{times}U(1){sub Y}{times}{tilde U}(1) theories is investigated.

• Research Organization: New York Univ., NY (United States)
• OSTI ID: 5555708
• Country of Publication: United States
• Language: English

Related Subjects

662210* -- Specific Theories & Interaction Models
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
COMPOSITE MODELS
CORRECTIONS
DECAY
ELECTROMAGNETIC FORM FACTORS
ELEMENTARY PARTICLES
FERMIONS
FIELD THEORIES
FLAVOR MODEL
FORM FACTORS
LEPTONS
MASSLESS PARTICLES
MATHEMATICAL MODELS
MUONS
NEUTRINOS
PARTICLE DECAY
PARTICLE MODELS
PARTICLE PROPERTIES
POSTULATED PARTICLES
Pa
Particle Systematics-- Unified Theories & Models-- (1992-)
QUARK MODEL
QUARKS
RADIATIVE CORRECTIONS
RENORMALIZATION
SCATTERING
TOP PARTICLES
UNIFIED GAUGE MODELS
UNIFIED-FIELD THEORIES
WEINBERG ANGLE
WEINBERG-SALAM GAUGE MODEL