A new scenario for string unification

Abstract

We present a new scenario for gauge coupling unification in flipped SU(5) string models, which identifies the $M_{32}$ scale of SU(3) and SU(2) unification with the empirical $M_{\mathrm{LEP}}\sim 10^{15-16}$~GeV scale, and the $M_{51}$ scale of SU(5) and U(1) unification with the theoretical $M_{\mathrm{string}}\sim 5\times 10^{17}$~GeV string unification scale. The vacuum shift necessary for the cancellation of the anomalous ${\mathrm{U}}_{\mathrm{A}}(1)$ 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.

8 pages, LaTeX, 2 figures (uuencoded)

References in corpus (1)

• Making Ends Meet: String Unification and Low-Energy Data

Cited by in corpus (22)

• String Theory and the Path to Unification: A Review of Recent Developments
• Flipped SU(5) X U(1)_X Models from F-Theory
• F-SU(5)
• Testable Flipped SU(5) x U(1)_X Models
• A Supersymmetric Flipped SU(5) Intersecting Brane World
• Elements of F-ast Proton Decay
• Three-Family $SO(10)$ Grand Unification in String Theory
• Non-Abelian Flat Directions in a Minimal Superstring Standard Model
• UHECR Particle Spectra from Crypton Decays
• Asymmetric Orbifolds and Grand Unification
• Experimental consequences of no-scale supergravity in light of the CDF $ee\gamma \gamma$ event
• Three-Family SU(5) Grand Unification in String Theory
• Has SUSY Gone Undetected in 9-jet Events? A Ten-Fold Enhancement in the LHC Signal Efficiency
• Supersymmetry: From the Fermi Scale to the Planck Scale
• Flipped Cryptons and the UHECRs
• Embedding Flipped SU(5) into SO(10)
• The Lightest CP-Even Higgs Boson Mass in the Testable Flipped SU(5) x U(1)_X Models from F-Theory
• Profumo di SUSY: Suggestive Correlations in the ATLAS and CMS High Jet Multiplicity Data
• The Diboson Excesses in Leptophobic $U(1{)}_{\mathrm{LP}}$ Models from String Theories
• String Model Building in the Age of D-Branes
• String Unification and Leptophobic $Z^{\prime }$ in Flipped SU(5)
• Three-Family Grand Unification in String Theory