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Chiral tensor fields and spontaneous breaking of Lorentz symmetry
Jan-Markus Schwindt, Christof Wetterich
Antisymmetric tensor fields interacting with quarks and leptons have been proposed as a possible solution to the gauge hierarchy problem. We compute the one-loop beta function for…
Light fermion masses and chiral freedom
Christof Wetterich
Within the scenario of chiral freedom we compute the quark and lepton masses of the first two generations in terms of their chiral couplings. This allows us to make a rough estimat…
Growing Matter
Luca Amendola, Marco Baldi, Christof Wetterich
We investigate quintessence cosmologies with a matter component consisting of particles with an increasing mass. While negligible in early cosmology, the appearance of a growing ma…
Functional renormalization for quantum phase transitions with non-relativistic bosons
C. Wetterich
Functional renormalization yields a simple unified description of bosons at zero temperature, in arbitrary space dimension and for complex fields. We concentrate on nonrela…
Primordial nucleosynthesis as a probe of fundamental physics parameters
Thomas Dent, Steffen Stern, Christof Wetterich
We analyze the effect of variation of fundamental couplings and mass scales on primordial nucleosynthesis in a systematic way. The first step establishes the response of primordial…
Renormalisation Flow and Universality for Ultracold Fermionic Atoms
S. Diehl, H. Gies, J. M. Pawlowski +1
A functional renormalisation group study for the BEC-BCS crossover for ultracold gases of fermionic atoms is presented. We discuss the fixed point which is at the origin of univers…
Flow Equations for the BCS-BEC Crossover
S. Diehl, H. Gies, J. M. Pawlowski +1
The functional renormalisation group is used for the BCS-BEC crossover in gases of ultracold fermionic atoms. In a simple truncation, we see how universality and an effective theor…