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Towards a renormalizable standard model without fundamental Higgs scalar
Holger Gies, Joerg Jaeckel, Christof Wetterich
We investigate the possibility of constructing a renormalizable standard model with purely fermionic matter content. The Higgs scalar is replaced by point-like fermionic self-inter…
Chemical Freeze-out and the QCD Phase Transition Temperature
P. Braun-Munzinger, J. Stachel, C. Wetterich
We argue that hadron multiplicities in central high energy nucleus-nucleus collisions are established very close to the phase boundary between hadronic and quark matter. In the had…
Critical Phenomena in Continuous Dimension
H. Ballhausen, J. Berges, C. Wetterich
We present a calculation of critical phenomena directly in continuous dimension d employing an exact renormalization group equation for the effective average action. For an Ising-t…
First Order Chiral Phase Transition from a Six-fermion ''Instanton''-Interaction
Joerg Jaeckel, Christof Wetterich
We compute the first order chiral phase transition for an instanton motivated quark model with a local six-quark interaction. In order to compare different solutions of the gap equ…
Holographic Branes
Jan-Markus Schwindt, Christof Wetterich
We discuss the properties of codimension-two branes and compare them to codimension-one branes. In particular, we show that for deficit angle branes the brane energy momentum tenso…
Temperature dependence of antiferromagnetic order in the Hubbard model
T. Baier, E. Bick, C. Wetterich
We suggest a method for an approximative solution of the two dimensional Hubbard model close to half filling. It is based on partial bosonisation, supplemented by an investigation…
Antiferromagnetic gap in the Hubbard model
T. Baier, E. Bick, C. Wetterich
We compute the temperature dependence of the antiferromagnetic order parameter and the gap in the two dimensional Hubbard model at and close to half filling. Our approach is based…
Gravity from Spinors
C. Wetterich
We investigate a possible unified theory of all interactions which is based only on fundamental spinor fields. The vielbein and metric arise as composite objects. The effective qua…
Gauge-Invariant Initial Conditions and Early Time Perturbations in Quintessence Universes
Michael Doran, Christian M. Mueller, Gregor Schaefer +1
We present a systematic treatment of the initial conditions and evolution of cosmological perturbations in a universe containing photons, baryons, neutrinos, cold dark matter, and…
Early Quintessence in Light of WMAP
Robert R. Caldwell, Michael Doran, Christian M. Mueller +2
We examine the cosmic microwave background (CMB) anisotropy for signatures of early quintessence dark energy -- a non-negligible quintessence energy density during the recombinatio…