Finite and Gauge-Yukawa unified theories: Theory and predictions
- Deptartment of Physics, High Energy Physics Division, Univ. of Helsinki and Helsinki Institute of Physics, FIN-00014 Helsinki (Finland)
- Institute for Theoretical Physics, Kanazawa Univ., Kanazawa 920-1192 (Japan)
- Instituto de Fisica, UNAM, Apdo. Postal 20-364, Mexico 01000 D.F. (Mexico)
- Nat. Technical University, Zografou, Greece, Athens (Greece)
All-loop Finite Unified Theories (FUTs) are very interesting N=1 GUTs in which a complete reduction of couplings has been achieved. FUTs realize an old field theoretical dream and have remarkable predictive power. Reduction of dimensionless couplings in N=1 GUTs is achieved by searching for renormalization group invariant (RGI) relations among them holding beyond the unification scale. Finiteness results from the fact that there exists RGI relations among dimensionless couplings that guarantee the vanishing of the {beta}- functions in certain N=1 supersymmetric GUTS even to all orders. Recent developments in the soft supersymmetry breaking (SSB) sector of N=1 GUTs and FUTs lead to exact RGI relations also in this sector of the theories. Of particular interest is a RGI sum rule for the soft scalar masses holding to all orders. The characteristic features of SU(5) models that have been constructed based on the above tools are: a) the old agreement of the top quark prediction with the measured value remains unchanged, b) the lightest Higgs boson is predicted to be around 120 GeV, c) the s-spectrum starts above several hundreds of GeV.
- OSTI ID:
- 21210260
- Journal Information:
- AIP Conference Proceedings, Vol. 490, Issue 1; Conference: 8. Mexican school on particles and fields, Oaxaca de Juarez (Mexico), 20-28 Nov 1998; Other Information: DOI: 10.1063/1.1301389; (c) 1999 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
- Country of Publication:
- United States
- Language:
- English
Similar Records
Quantum Reduction of Couplings in Finite Unified Theories
Finite Unified Theories and Low Energy Phenomenology