The second string (phenomenology) revolution

Abstract

In the past three years our views on how the standard model of particle physics could be embedded into string theory have dramatically changed. The heterotic string is no longer the only possibility for such an embedding and other perturbative (or non-perturbative) corners of M-theory, like Type I or Type II strings seem now possible. It has also been realized that the string scale $M_s$ is not necessary close to the Planck scale and could be much smaller, of order the intermediate scale $\sqrt{M_W{M}_p}$ or even close to the weak scale. In addition, semi-realistic three generation models have recently been constructed starting with Type IIB compact orientifolds. I briefly discuss some of these developements which represent a revolution in our understanding of string phenomenology.

15 pages, Latex file, no figures. Contribution to the proceedings of Strings 99, Potsdam (Germany), July 1999

References in corpus (3)

• Anomalous U(1)'s and Proton Stability in Brane Models
• Mass scales, supersymmetry breaking and open strings
• Scales of String Theory

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• Stabilization of internal spaces in multidimensional cosmology
• Some Phenomenology of Intersecting D-Brane Models
• Muon anomalous magnetic moment, $B\to X_s\gamma$ and dark matter detection in the string models with dilaton domination
• Scales of String Theory
• Domain structures in quantum graphity
• TeV Scale Strings and Scattering Amplitudes at the LHC
• Time-covariant Schrödinger equation and invariant decay probability: The $\Lambda$-Kantowski-Sachs universe