A new scenario for string unification

Details A new scenario for string unification A new scenario for string unification

1995-11-27

arxiv.org/abs/hep-ph/9511426v1

Phys.Rev.Lett. 76 (1996) 1566-1569

Physics

High Energy Physics

High Energy Physics - Phenomenology

8 pages, LaTeX, 2 figures (uuencoded)

Scientific paper

10.1103/PhysRevLett.76.1566

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 $M_{\rm LEP}\sim10^{15-16}$~GeV scale, and the $M_{51}$ scale of SU(5) and U(1) unification with the theoretical $M_{\rm string}\sim5\times10^{17}$~GeV string unification scale. The vacuum shift necessary for the cancellation of the anomalous $\rm U_A(1)$ 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.

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