Sin/sup 2/THETA/sub W/, grand unified gauge theories and proton decay

Journal Article · Thu May 01 00:00:00 EDT 1980 · AIP Conf. Proc.; (United States)

DOI:https://doi.org/10.1063/1.32172· OSTI ID:5458888

Marciano, W J

The role of sin/sup 2/THETA/sub W/ in the Weinberg--Salam SU(2) x U(1) model is reviewed. Effects of radiative corrections on neutral current determinations of this parameter are described. It is pointed out that such effects can potentially shift the real value of sin/sup 2/THETA/sub W/ away from the present experimental world average of 0.23 +- 0.015. Predictions by grand unified gauge theories for the effective low energy value of sin/sup 2/THETA/sub W/ are also reviewed. Implications of those results for the Georgi--Glashow SU(5) model and the lifetime of the proton are outlined. Combining that analysis with the Goldman--Ross estimate for the super-heavy boson mass M/sub S/approx. =3 x 10/sup 14/ GeV., the SU(5) model is found to predict sin/sup 2/THETA/sub W/approx. =.21--.22 and a proton lifetime tau/sub p/approx. =10/sup 29/--10/sup 30/ yrs.

• Research Organization: The Rockefeller University, New York, New York 10021
• OSTI ID: 5458888
• Report Number(s): CONF-7910116-
• Journal Information: AIP Conf. Proc.; (United States), Journal Name: AIP Conf. Proc.; (United States) Vol. 59:1; ISSN APCPC
• Country of Publication: United States
• Language: English

Related Subjects

645203* -- High Energy Physics-- Particle Interactions & Properties-Theoretical-- Weak Interactions & Properties
645400 -- High Energy Physics-- Field Theory
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BARYONS
CORRECTIONS
DEEP INELASTIC SCATTERING
ELEMENTARY PARTICLES
FERMIONS
FIELD THEORIES
GAUGE INVARIANCE
GLUONS
HADRONS
HIGGS MODEL
INELASTIC SCATTERING
INTERACTIONS
INVARIANCE PRINCIPLES
LEPTON-BARYON INTERACTIONS
LEPTON-HADRON INTERACTIONS
LEPTON-NUCLEON INTERACTIONS
LIE GROUPS
LIFETIME
MATHEMATICAL MODELS
NEUTRAL-CURRENT INTERACTIONS
NUCLEONS
PARTICLE INTERACTIONS
PARTICLE MODELS
PERTURBATION THEORY
POSTULATED PARTICLES
PROTONS
QUANTUM CHROMODYNAMICS
QUANTUM FIELD THEORY
RADIATIVE CORRECTIONS
RENORMALIZATION
SCATTERING
SPACE-TIME
SU GROUPS
SU-2 GROUPS
SYMMETRY GROUPS
U GROUPS
U-1 GROUPS
UNIFIED GAUGE MODELS
VACUUM POLARIZATION
WEINBERG-SALAM GAUGE MODEL