856 citations
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4 papers · 2 filters
Unparticle constraints from SN1987A
Steen Hannestad, Georg Raffelt, Yvonne Y. Y. Wong
The existence of an unparticle sector, weakly coupled to the standard model, would have a profound impact on supernova (SN) physics. Emission of energy into the unparticle sector f…
Non-Perturbative Flat Direction Decay
Anders Basboll, David Maybury, Francesco Riva +1
We argue that supersymmetric flat direction vacuum expectation values can decay non-perturbatively via preheating. Considering a toy U(1) gauge theory, we explicitly calculate the…
The Matrix Reloaded - on the Dark Energy Seesaw
Kari Enqvist, Steen Hannestad, Martin S. Sloth
We propose a novel mechanism for dark energy, based on an extended seesaw for scalar fields, which does not require any new physics at energies below the TeV scale. A very light qu…
Determination of the s-wave pion-nucleon threshold scattering parameters from the results of experiments on pionic hydrogen
G. C. Oades, G. Rasche, W. S. Woolcock +2
We give the conversion equations which lead from experimental values of the transition energy in pionic hydrogen and the total width of the level to values of the…