GUTs 3: susy GUTs 2

Technical Report · Mon Nov 16 04:00:00 EST 1981

OSTI ID:5472563

Ellis, J; Nanopoulos, D V; Rudaz, S

We compare the phenomenological predictions of grand unified theories (GUTs) and supersymmetric (susy) GUTs for nucleon decays, sin /sup 2/theta/sub W/ and m/sub b//m/sub tau/. Conventional GUTs are consistent with experiment for all three of these observables. In contrast with previous analyses, we find that susy GUTs have problems with sin/sup 2/theta/sub W/, but not with m/sub b//m/sub tau/ or the experimental lower limit on the nucleon lifetime. This explains the half-time score line in the title. Susy GUTs may cause nucleon decays with an observable lifetime: in the simplest SU(5) susy GUT we find GAMMA(N ..-->.. anti..nu../sub tau/K) >> GAMMA(N ..-->.. anti..nu../sub ..mu../K) >> GAMMA(N ..-->.. anti..nu pi.., ..mu../sup +/K) >> GAMMA(N ..-->.. ..mu../sup +/..pi..) >> GAMMA(N ..-->.. e/sup +/K) >> GAMMA(N ..-->.. e/sup +/..pi..).

• Research Organization: European Organization for Nuclear Research, Geneva (Switzerland); Minnesota Univ., Minneapolis (USA). School of Physics and Astronomy
• DOE Contract Number: AC02-83ER40105
• OSTI ID: 5472563
• Report Number(s): CERN-3199; COO-1764-438; ON: DE85012393
• Country of Publication: United States
• Language: English

Related Subjects

645301* -- High Energy Physics-- Particle Invariance Principles & Symmetries-- General-- (-1987)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BARYONS
BEAUTY PARTICLES
DECAY
ELECTROWEAK MIXING ANGLE
ELEMENTARY PARTICLES
FERMIONS
FIELD THEORIES
GRAND UNIFIED THEORY
HADRONS
HEAVY LEPTONS
LEPTONS
MASS
MATHEMATICAL MODELS
NUCLEONS
PARTICLE DECAY
PARTICLE MODELS
POSTULATED PARTICLES
RENORMALIZATION
SUPERSYMMETRY
SYMMETRY
TAU PARTICLES
UNIFIED GAUGE MODELS
UNIFIED-FIELD THEORIES