Strong unification |
| |
| Institution: | 1. Department of Physics, Theoretical Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, United Kingdom;2. High Energy Section, International Centre for Theoretical Physics, P.O. Box 586, Trieste, Italy;1. Faculty of Mining Engineering, Kim Chaek University of Technology, Pyongyang, Democratic People''s Republic of Korea;2. School of Engineering and Science, Kim Chaek University of Technology, Pyongyang, Democratic People''s Republic of Korea;1. Beckman Institute for Advanced Science and Technology, University of Illinois Urbana-Champaign, USA;2. Department of Electrical and Computer Engineering, University of Illinois Urbana-Champaign, USA;3. Department of Cognitive Science, University of California San Diego, USA;4. Center for Brain, Biology and Behavior, University of Nebraska Lincoln, USA;1. Graduate School of the Humanities, Senshu University, 2-1-1, Higashimita, Tama-ku, Kawasaki-shi, Kanagawa, 214-8580, Japan;2. The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 133-0033, Japan;3. Japan Society for the Promotion of Science, 5-3-1 Kojimachi, Chiyoda-ku, Tokyo, 102-0083, Japan;4. School of Human Sciences, Senshu University, 2-1-1, Higashimita, Tama-ku, Kawasaki-shi, Kanagawa, 214-8580, Japan |
| |
| Abstract: | We investigate the possibility that unification occurs at strong coupling. We show that, despite the fact the couplings pass through a strong coupling regime, accurate predictions for their low energy values are possible because the couplings of the theory flow to infrared fixed points. We determine the low-energy QCD coupling in a favoured class of strong coupling models and find it is reduced from the weak coupling predictions, lying close to the experimentally measured value. We extend the analysis to the determination of quark and lepton masses and show that (even without Grand Unification) the infra-red fixed point structure may lead to good predictions for the top mass, the bottom to tau mass ratio and tan β. Finally we discuss the implications for the unification scale finding it to be increased from the MSSM value and closer to the heterotic string prediction. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
