Claus Kiefer

Asymptotic freedom in inflationary cosmology with a non-minimally coupled Higgs field

We consider the renormalization group improvement in the theory of the Standard Model Higgs boson playing the role of an inflaton with a strong non-minimal coupling to gravity. It suggests the range of the Higgs mass

Higgs boson, renormalization group, and naturalness in cosmology

135.6 {\rm GeV} \lesssim M_H\lesssim 184.5 {\rm GeV}

Quantum to classical transition for fluctuations in the early universe

compatible with the current CMB data (the lower WMAP bound on

Pointer states for primordial fluctuations in inflationary cosmology

n_s

Quantum gravitational contributions to the cosmic microwave background anisotropy spectrum.

), which is close to the widely accepted range dictated by the electroweak vacuum stability and perturbation theory bounds. We find the phenomenon of asymptotic freedom induced by this non-minimal curvature coupling, which brings the theory to the weak coupling domain everywhere except at the lower and upper boundary of this range. The renormalization group running of the basic quantity

Black Holes: Theory and Observation

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Quantum gravity: general introduction and recent developments

A_I

Symmetries, superselection rules, and decoherence

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Quantum fate of singularities in a dark-energy dominated universe

-- the anomalous scaling in the non-minimally coupled Standard Model, which analytically determines all characteristics of the CMB spectrum -- brings

On the interaction of mesoscopic quantum systems with gravity

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