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34 papers · 1 filter
Antikaon production in nucleon-nucleon reactions near threshold
A. Sibirtsev, W. Cassing, C. M. Ko
The antikaon production cross section from nucleon-nucleon reactions near threshold is studied in a meson exchange model. We include both pion and kaon exchange, but neglect the in…
Medium effects in the production and decay of - and -resonances in pion-nucleus interactions
W. Cassing, Ye. S. Golubeva, A. S. Iljinov +1
The - and -resonance production and their dileptonic decay in reactions at GSI energies are calculated within the intranuclear cascade (INC) approach. The invariant m…
Gauge Invariance of Resummation Schemes: The QCD Partition Function
Marc Achhammer, Ulrich Heinz, Stefan Leupold +1
We pick up a method originally developed by Cheng and Tsai for vacuum perturbation theory which allows to test the consistency of different sets of Feynman rules on a purely diagra…
Complex su_q(2) Dynamical Symmetry, Limiting Cases and 1-Dimensional Potential Realisation
A. Ludu, W. Scheid
Using a complex deformation q=exp(is) of su(2) we obtain extensions of the finite-dimensional representations towards the infinite-dimensional ones. A generalised q-deformation of…
Detectability of Strange Matter in Heavy Ion Experiments
Juergen Schaffner-Bielich, Carsten Greiner, Alexander Diener +1
We discuss the properties of two distinct forms of hypothetical strange matter, small lumps of strange quark matter (strangelets) and of hyperon matter (metastable exotic multihype…
Convergence properties of the cluster expansion for equal-time Green functions in scalar theories
A. Peter, W. Cassing, J. M. Hauser +1
We investigate the convergence properties of the cluster expansion of equal-time Green functions in scalar theories with quartic self-coupling in (0+1), (1+1), and (2+1) space-time…