The strong coupling constant in grand unified theories

Conference · Wed Jan 01 00:00:00 EST 1997

OSTI ID:674776

Pierce, D M

The prediction of the strong coupling constant in grand unified theories is reviewed, first in the standard model, then in the supersymmetric version. Various corrections are considered. The predictions in both supergravity-induced and gauge-mediated supersymmetry breaking models are discussed. In the region of parameter space without large fine tuning the strong coupling is predicted to be {alpha}{sub s} (M{sub Z}) {approx}> 0.13. Imposing {alpha}{sub s} (M{sub Z}) = 0.118, the authors require a unification scale threshold correction of typically -2%, which is accommodated by some GUT models but in conflict with others.

• Research Organization: Stanford Univ., Stanford Linear Accelerator Center, CA (US)
• Sponsoring Organization: USDOE Office of Energy Research, Washington, DC (US)
• DOE Contract Number: AC03-76SF00515
• OSTI ID: 674776
• Report Number(s): SLAC-PUB-7403; CONF-9608101-; ON: DE98059100; TRN: US200305%%535
• Resource Relation: Conference: 24. SLAC Summer Institute on Particle Physics: the strong interaction, from hadrons to protons, Stanford, CA (US), 08/19/1996--08/30/1996; Other Information: Supercedes report DE98059100; PBD: Jan 1997; PBD: 1 Jan 1997
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
COUPLING CONSTANTS
FORECASTING
HADRONS
PHYSICS
PROTONS
STANDARD MODEL
STANFORD LINEAR ACCELERATOR CENTER
STRONG INTERACTIONS
SUPERSYMMETRY
TUNING