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On the Particle Interpretation of the PVLAS Data: Neutral versus Charged Particles
Markus Ahlers, Holger Gies, Joerg Jaeckel +1
Recently the PVLAS collaboration reported the observation of a rotation of linearly polarized laser light induced by a transverse magnetic field - a signal being unexpected within…
Why the early Universe preferred the non-supersymmetric vacuum: Part II
Steven A. Abel, Joerg Jaeckel, Valentin V. Khoze
It was recently shown in hep-th/0610334 that in the context of the ISS models with a metastable supersymmetry breaking vacuum, thermal effects generically drive the Universe to the…
Entropy Growth and the Dark Energy Equation of State
Wilfried Buchmuller, Joerg Jaeckel
We revisit the conjecture of a generalized second law of thermodynamics which states that the combined entropy of matter and horizons must grow. In an expanding universe a generali…
SUSY breaking by a metastable ground state: Why the early Universe preferred the non-supersymmetric vacuum
Steven A. Abel, Chong-Sun Chu, Joerg Jaeckel +1
Supersymmetry breaking in a metastable vacuum is re-examined in a cosmological context. It is shown that thermal effects generically drive the Universe to the metastable minimum ev…
Do Instantons Like a Colorful Background?
Holger Gies, Joerg Jaeckel, Jan M. Pawlowski +1
We investigate chiral symmetry breaking and color symmetry breaking in QCD. The effective potential of the corresponding scalar condensates is discussed in the presence of non-pert…
Illuminating the Hidden Sector of String Theory by Shining Light through a Magnetic Field
Steven A. Abel, Joerg Jaeckel, Valentin V. Khoze +1
Many models of physics beyond the Standard Model predict minicharged particles to which current and near future low-energy experiments are highly sensitive. Such minicharges arise…
Vacuum Birefringence as a Probe of Planck Scale Noncommutativity
Steven A. Abel, Joerg Jaeckel, Valentin V. Khoze +1
Because of ultraviolet/infrared (UV/IR) mixing, the low energy physics of noncommutative gauge theories in the Moyal-Weyl approach seems to depend crucially on the details of the u…
Polarized Light Propagating in a Magnetic Field as a Probe of Millicharged Fermions
Holger Gies, Joerg Jaeckel, Andreas Ringwald
Possible extensions of the standard model of elementary particle physics suggest the existence of particles with small, unquantized electric charge. Photon initiated pair productio…
What measurable zero point fluctuations can(not) tell us about dark energy
Michael Doran, Joerg Jaeckel
We show that laboratory experiments cannot measure the absolute value of dark energy. All known experiments rely on electromagnetic interactions. They are thus insensitive to parti…
We need lab experiments to look for axion-like particles
Joerg Jaeckel, Eduard Masso, Javier Redondo +2
The PVLAS signal has renewed the interest in light bosons coupled to the electromagnetic field. However, astrophysical bounds coming from the lifetime of the sun and the CAST exper…