Sparticle spectrum and dark matter in type I string theory with an intermediate scale

Abstract

The supersymmetric particle spectrum is calculated in type I string theories formulated as orientifold compactifications of type IIB string theory. A string scale at an intermediate value of $10^{11}-10^{12}$ GeV is assumed and extra vector-like matter states are introduced to allow unification of gauge coupling constants to occur at this scale. The qualitative features of the spectrum are compared with Calabi-Yau compactification of the weakly coupled heterotic string and with the eleven dimensional supergravity limit of $M$-theory. Some striking differences are observed. Assuming that the lightest neutralino provides the dark matter in the universe, further constraints on the sparticle spectrum are obtained. Direct detection rates for dark matter are estimated.

LaTeX file (10 pages+10 figures), improved references, v3: typos fixed, accepted for publication in Physics Letters B

References in corpus (3)

• The Cosmic Triangle: Revealing the State of the Universe
• Standard-like Models with Broken Supersymmetry from Type I String Vacua
• Sparticle spectrum in M-theory with five-brane dominance

Cited by in corpus (9)

• Dark Matter Detection in the Light of Recent Experimental Results
• 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
• Determination of the String Scale in D-Brane Scenarios and Dark Matter Implications
• Muon anomalous magnetic moment in supersymmetric scenarios with an intermediate scale and nonuniversality
• Natural Dark Matter from Type I String Theory
• A model of cosmology and particle physics at an intermediate scale
• Spontaneous dark-matter mass generation along cosmological attractors in string theory