Particle theory

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A new method for finding vacua in string phenomenology

JOURNAL OF HIGH ENERGY PHYSICS (2007) ARTN 023

Authors:

James Gray, Yang-Hui He, Anton Iiderton, Andre Lukas
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Heterotic compactification, an algorithmic approach

JOURNAL OF HIGH ENERGY PHYSICS (2007) ARTN 049

Authors:

Lara B Anderson, Yang-Hui He, Andre Lukas
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Heterotic string compactifications on half-flat manifolds II

JOURNAL OF HIGH ENERGY PHYSICS (2007) ARTN 081

Authors:

Sebastien Gurrieri, Andre Lukas, Andrei Micu
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Improved higgs naturalness with supersymmetry

AIP CONF PROC 903 (2007) 439-442

Authors:

B Gripaios, SM West

Abstract:

We present a supersymmetric model of electroweak symmetry-breaking exhibiting improved naturalness, wherein the stop mass can be pushed beyond the reach of the Large Hadron Collider without unnatural fine tuning. This implies that supersymmetry may still solve the hierarchy problem, even if it eludes detection at the LHC.
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Mixed sneutrino dark matter and the ratio Omega(b)/Omega(dm center dot)

AIP CONF PROC 903 (2007) 567-570

Abstract:

It is known that the cosmological baryon density (Omega(b)) and dark matter density (Q(dm)) have strikingly similar values. However, in most theories of the early Universe, each density is explained by separate dynamics and consequently there is no compelling reason for this observation. In this note, I briefly review a model in which the dark matter species possesses a particle-antiparticle asymmetry. This asymmetry determines both the baryon asymmetry and strongly affects the dark matter density, thus naturally linking Omega(b) and Omega(dm). In these models it is shown that sneutrinos can play the role of such dark matter
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