Topics on String Phenomenology
arXiv:0710.4267
Abstract
These lectures present some topics of string phenomenology and contain two parts. In the first part, I review the possibility of lowering the string scale in the TeV region, that provides a theoretical framework for solving the mass hierarchy problem and unifying all interactions. The apparent weakness of gravity can then be accounted by the existence of large internal dimensions, in the submillimeter region, and transverse to a braneworld where our universe must be confined. I review the main properties of this scenario and its implications for observations at both particle colliders, and in non-accelerator gravity experiments. In the second part, I discuss a simple framework of toroidal string models with magnetized branes, that offers an interesting self-consistent setup for string phenomenology. I will present an algorithm for fixing the geometric parameters of the compactification, build calculable particle physics models such as a supersymmetric SU(5) Grand Unified Theory with three generations of quarks and leptons, and implement low energy supersymmetry breaking with gauge mediation that can be studied directly at the string level.
42 pages, 15 figures, Lectures given at Les Houches 2007 Summer School, Added references
References in corpus (26)
- The Hierarchy Problem and New Dimensions at a Millimeter
- de Sitter Vacua in String Theory
- Hierarchies from Fluxes in String Compactifications
- Black Holes at the LHC
- Extra Spacetime Dimensions and Unification
- Weak Scale Superstrings
- Neutrino Masses from Large Extra Dimensions
- Black Holes and Sub-millimeter Dimensions
- Type-I strings on magnetised orbifolds and brane transmutation
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- A D-brane alternative to unification
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- Comments on Open-String Orbifolds with a Non-Vanishing B_{ab}
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- D-branes and the Standard Model
- Supersymmetry of M-Branes at Angles
- Constraints on Large Extra Dimensions from Neutrino Oscillation Experiments
- Split extended supersymmetry from intersecting branes
- Brane to bulk supersymmetry breaking and radion force at micron distances
- Open string topological amplitudes and gaugino masses
- Phenomenology of a leptonic goldstino and invisible Higgs boson decays
- Magnetic fluxes and moduli stabilization
- Topological Masses From Broken Supersymmetry
- A New Gauge Mediation Theory
- Supersymmetric SU(5) GUT with Stabilized Moduli
Cited by in corpus (7)
- The LHC String Hunter's Companion (II): Five-Particle Amplitudes and Universal Properties
- Evidence for F(uzz) Theory
- Tadpole Resummations in String Theory
- (Unoriented) T-folds with few T's
- A closer look at string resonances in dijet events at the LHC
- From Twists and Shifts to L-R asymmetric D-branes
- Dijet Signature of Low Mass Strings in the Early LHC Data