The Search for a Realistic String Model at LHC

Abstract

We survey the low-energy supersymmetry phenomenology of a three-family Pati-Salam model constructed from intersecting D6-branes in Type IIA string theory on the T^6/(Z_2 x Z_2) orientifold which possesses many of the phenomenological properties desired in string model-building. In the model, there is no exotic matter in the low-energy spectrum, the correct mass hierarchies for quarks and leptons may be obtained, and the gauge couplings are automatically unified at the string scale. We calculate the supersymmetry breaking soft terms and the corresponding low-energy supersymmetry particle spectra for the model. We find the WMAP constrained dark matter density can be generated in this model in the stau-neutralino and chargino-neutralino coannihilation regions, with expected final states at LHC consisting of low energy leptons and O(GeV) neutrinos. Moreover, we expect final states in the supercritical string cosmology (SSC) scenario to comprise high energy leptons and O(GeV) neutrinos.

35 pages, 4 figures, accepted for publication in PRD

References in corpus (19)

• PYTHIA 6.4 Physics and Manual
• Five-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Data Processing, Sky Maps, and Basic Results
• Four-dimensional String Compactifications with D-Branes, Orientifolds and Fluxes
• micrOMEGAs2.0: a program to calculate the relic density of dark matter in a generic model
• Estimate of BR(B -> X_s gamma) at O(alpha_s^2)
• Search for Bs --> mu+mu- and Bd --> mu+mu- Decays with 2fb-1 of ppbar Collisions
• The Landscape of Sparticle Mass Hierarchies and Their Signature Space at the LHC
• Determining the Dark Matter Relic Density in the Minimal Supergravity Stau-Neutralino Coannihilation Region at the Large Hadron Collider
• A Realistic World from Intersecting D6-Branes
• Instanton effects in N=1 brane models and the Kahler metric of twisted matter
• Realistic Yukawa Textures and SUSY Spectra from Intersecting Branes
• Smoothly evolving Supercritical-String Dark Energy relaxes Supersymmetric-Dark-Matter Constraints
• Large Volume Axionic Swiss-Cheese Inflation
• Type IIA Pati-Salam Flux Vacua
• Dilaton and off-shell (non-critical string) effects in Boltzmann equation for species abundances
• Supersymmetry Signals of Supercritical String Cosmology at the Large Hadron Collider
• "Finite" Non-Gaussianities and Tensor-Scalar Ratio in Large Volume Swiss-Cheese Compactifications
• Supercriticality of a Class of Critical String Cosmological Solutions
• Stringy WIMP Detection and Annihilation

Cited by in corpus (7)

• Direct generation of a Majorana mass for the Neutron from Exotic Instantons
• Resolving the $(g-2{)}_{\mu }$ Discrepancy with $\mathcal{F}$-$SU$(5) Intersecting D-branes
• Superparticle Signatures: from PAMELA to the LHC
• Proton Stability and Dark Matter in a Realistic String MSSM
• More about Neutron Majorana mass from Exotic Instantons: an alternative mechanism in Low-Scale String theory
• Light Higgsino Dark Matter in the MSSM on D-branes
• Universal Soft Terms in the MSSM on D-branes