Determination of the String Scale in D-Brane Scenarios and Dark Matter Implications

Abstract

We analyze different phenomenological aspects of D-brane constructions. First, we obtain that scenarios with the gauge group and particle content of the supersymmetric standard model lead naturally to intermediate values for the string scale, in order to reproduce the value of gauge couplings deduced from experiments. Second, the soft terms, which turn out to be generically non universal, and Yukawa couplings of these scenarios are studied in detail. Finally, using these soft terms and the string scale as the initial scale for their running, we compute the neutralino-nucleon cross section. In particular we find regions in the parameter space of D-brane scenarios with cross sections in the range of $10^{-6}$--$10^{-5}$ pb, i.e. where current dark matter experiments are sensitive. For instance, this can be obtained for $\tan \beta >5$.

Figures improved, misprints corrected, results basically unchanged

Cited by in corpus (22)

• Dark Matter Detection in the Light of Recent Experimental Results
• Effect of the galactic halo modeling on the DAMA/NaI annual modulation result: an extended analysis of the data for WIMPs with a purely spin-independent coupling
• Brane-Antibrane Kinetic Mixing, Millicharged Particles and SUSY Breaking
• Analysis of the parameter space and spectrum of the $\mu \nu$SSM
• Re-examination of Electroweak Symmetry Breaking in Supersymmetry and Implications for Light Superpartners
• Does Solar Physics Provide Constraints to Weakly Interacting Massive Particles?
• SUSY breaking mediation mechanisms and (g-2)_μ, B -> X_s γ, B -> X_{s} l^+ l^- and B_s -> μ^+ μ^-
• Phenomenology of GUT-less Supersymmetry Breaking
• Calculable inverse-seesaw neutrino masses in supersymmetry
• What if supersymmetry breaking appears below the GUT scale?
• Constraining the string scale: from Planck to Weak and back again
• Neutralino-Nucleon Cross Section and Charge and Colour Breaking Constraints
• Selecting Supersymmetric String Scenarios From Sparticle Spectra
• Relic Neutralino Density in Scenarios with Intermediate Unification Scale
• Fermion Masses and Mixing in Intersecting Branes Scenarios
• Muon anomalous magnetic moment in supersymmetric scenarios with an intermediate scale and nonuniversality
• Natural Dark Matter from Type I String Theory
• A comparison between direct and indirect dark matter search
• Muon anomalous magnetic moment, $B\to X_s\gamma$ and dark matter detection in the string models with dilaton domination
• Candidates for non-baryonic dark matter
• $B_s\to {\mu }^{+}{\mu }^{-}$ and the upward-going muon flux from the WIMP annihilation in the sun or the earth
• Fermion Masses and Mixing in Four and More Dimensions