Gauge coupling unification and the top mass in string models with SU(4) × O(4) symmetry

 
see the original item page
in the repository's web site and access all digital files if the item*
share




1996 (EN)
Gauge coupling unification and the top mass in string models with SU(4) × O(4) symmetry (EN)

Tracas, ND (EN)
Leontaris, GK (EN)

N/A (EN)

We discuss the low energy implications of gauge coupling unification at the string scale, taking into account string threshold corrections in the SU(4) x O(4) model. We express sin(2) theta(w) and a(3) as functions of the calculable string threshold differences and discuss simple examples of spectra which retain the successful predictions of the supersymmetric unification. Using further the low energy data and reasonable values of the common gauge coupling at the string scale, we obtain the range of the threshold corrections. Finally, we study the top Yukawa coupling (h(t)) evolution whose initial value is determined in terms of the common gauge coupling at the string scale. We find that h(t) reaches its (quasi) infra-red fixed point at the weak scale and discuss the implications on the top mass. (EN)

journalArticle

FLIPPED SU(5) (EN)
THRESHOLD CORRECTIONS (EN)
4-DIMENSIONAL SUPERSTRINGS (EN)
MODULAR INVARIANCE (EN)
SCALE (EN)
Fixed Point (EN)
GRAVITATIONAL COUPLINGS (EN)
Low Energy (EN)
Infra Red (EN)

Εθνικό Μετσόβιο Πολυτεχνείο (EL)
National Technical University of Athens (EN)

Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics (EN)

1996


ELSEVIER SCIENCE BV (EN)



*Institutions are responsible for keeping their URLs functional (digital file, item page in repository site)