New Scenario for String Unification

1995/11/27 by J. Lopez, Jorge L. Lopez, D.V. Nanopoulos +1 · 1 citation
Physics and Astronomy · #Black Holes and Theoretical Physics #Computer science #Coupling (piping) #Gauge (firearms) #Grand Unified Theory #Particle physics #Particle physics theoretical and experimental studies #Physics #Quantum Chromodynamics and Particle Interactions #Quantum mechanics #Scale (ratio) #String (physics) #Supersymmetry #Theoretical physics #Unification #hep-ph #hep-th

paper · pdf · doi:10.1103/physrevlett.76.1566

published as Phys.Rev.Lett. 76 (1996) 1566-1569 · 8 pages, LaTeX, 2 figures (uuencoded)

arxiv created 1995/11/27 · openalex publication_date 1996/03/04 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

We present a new scenario for gauge coupling unification in flipped SU(5) string models, which identifies the M₃₂ scale of SU(3) and SU(2) unification with the empirical M_LEP\ensuremath∼10^15\ensuremath-16GeV scale, and the M₅₁ scale of SU(5) and U(1) unification with the theoretical M_string\ensuremath∼5\ifmmode×\else\texttimes\fi10¹⁷GeV string unification scale. The vacuum shift necessary for the cancellation of the anomalous U_A(1) and an SU(4) hidden sector with fractionally charged particles play a crucial role in the dynamical determination of all intermediate mass scales in this scenario.

Citations

• Fayet-Iliopoulos terms in string theory

Cited by

• Three-Family SO(10) Grand Unification in String Theory