OPUS 4 | Universitätspublikationen

Über P.A.M. Diracs Beitrag zur Elektronentheorie (1997)

Frank Linhard

Über den Widerspruch von religiöser Hoffnung und politischer Analyse in Adam Smith Theorie des freien Marktes (2011)

Burkhard Kühnemund

Die zentrale These des vorliegenden Aufsatzes ist es, dass es ein Adam Smith-Problem im traditionellen Sinne nicht gibt, aber sehr wohl einen Selbstwiderspruch in Adam Smith ökonomischer Theorie. Der Aufsatz behandelt zunächst die enge systematische Verbindung von Smith ökonomischer und ethischer Theorie. Die Verbindung beruht auf der Annahme eines höchsten Wesens und einer daraus gefolgerten prästabilisierenden Harmonie Dem religiösen Vertrauen auf eine natürliche Ordnung korresponiert der Glaube an die Gerechtigkeit des Marktes. Smith weitere politische Analyse produziert allerdings einen Selbstwiderspruch. Smith zeigt auf, dass die unternehmerischen Eigeninteressen dem Allgemeininteresse der Gesellschaft widersprechen und die Unternehmer zudem virtuoser und erfolgreicher beim Durchsetzen ihrer eigenen Interessen agieren als andere Marktakteure. Dennoch hält Smith an der Annahme fest, der Markt entfalte eine harmonisierende und den allseitigen Wohlstand fördernde Wirkung. Diese Annahme mutiert bei seinen Epigonen zu einer ontologischen Gewissheit.

Zivilrechtsgesellschaft : Wege zu einer globalen „Herrschaft des Rechts“ (2004)

Gralf-Peter Calliess

Xi- and Xi+ production in central Pb+Pb collisions at 158 GeV/c per nucleon (2002)

S. V. Afanasiev NA49 Collaboration

Results of the production of Xi and Xi-bar hyperons in central Pb+Pb interactions at 158 GeV/c per nucleon are presented. This analysis utilises a global reconstruction procedure, which allows a measurement of 4pi integrated yields to be made for the first time. Inverse slope paramters, which are determined from an exponential fit to the transverse mass spectra, are shown. Central rapidity densities are found to be 1.49 +- 0.08 and 0.33 +- 0.04 per event per unit of rapidity for Xi and Xi-bar respectively. Yields integrated to full phase space are 4.12 +- 0.02 and 0.77 +- 0.04 for Xi and Xi-bar. The ratio of Xi-bar/Xi at mid-rapidity is 0.22 +- 0.03.

Xi and Xi-bar production in 158 GeV/nucleon Pb + Pb collisions (1998)

Harald Appelshäuser NA49 Collaboration

We report measurements of Xi and Xi-bar hyperon absolute yields as a function of rapidity in 158 GeV/c Pb+Pb collisions. At midrapidity, dN/dy = 2.29 +/- 0.12 for Xi, and 0.52 +/- 0.05 for Xi-bar, leading to the ratio of Xi-bar/Xi = 0.23 +/- 0.03. Inverse slope parameters fitted to the measured transverse mass spectra are of the order of 300 MeV near mid-rapidity. The estimated total yield of Xi particles in Pb+Pb central interactions amounts to 7.4 +/- 1.0 per collision. Comparison to Xi production in properly scaled p+p reactions at the same energy reveals a dramatic enhancement (about one order of magnitude) of Xi production in Pb+Pb central collisions over elementary hadron interactions.

Van der Waals excluded volume model for Lorentz contracted rigid spheres (2000)

Kyrill A. Bugaev Mark I. Gorenstein Horst Stöcker Walter Greiner

Conventional cluster and virial expansions are generalized to momentum dependent interparticle potentials. The model with Lorentz contracted hard core potentials is considered, e.g. as hadron gas model. A Van der Waals-type model with a temperature dependent excluded volume is derived. Lorentz contraction effects at given temperature are stronger for light particles and make their effective excluded volume smaller than that of heavy ones.

UrQMD at RHIC energies (1999)

Marcus Bleicher

Final state is dominated by meson-meson and meson-baryon reaction, Fraction of high energy baryon-baryon reactions is extremely small Rapidity distribution of all net baryons shows a dip Baryon to anti-baryon ratio at midrapidity: 3/1

Upper limit of D 0 production in central Pb-Pb collisions at 158 A GeV (2005)

Christopher Alt NA49 Collaboration

Results are presented from a search for the decays D0 -> K min pi plus and D0 bar -> K plus pi min in a sample of 3.8x10^6 central Pb-Pb events collected with a beam energy of 158A GeV by NA49 at the CERN SPS. No signal is observed. An upper limit on D0 production is derived and compared to predictions from several models.

Unusual bound states of quark matter within the NJL model (2000)

Igor N. Mishustin Leonid M. Satarov Horst Stöcker Walter Greiner

Properties of dense quark matter in and out of chemical equilibrium are studied within the SU(3) Nambu Jona-Lasinio model. In addition to the 4 fermion scalar and vector terms the model includes also the 6 fermion flavour mixing interaction. First we study a novel form of deconfined matter, meso-matter, which is composed of equal number of quarks and antiquarks. It can be thought of as a strongly compressed meson gas where mesons are melted into their elementary constituents, quarks and antiquarks. Strongly bound states in this quark antiquark matter are predicted for all flavour combinations of qq pairs. The maximum binding energy reaches up to 180 MeV per qq pair for mixtures with about 70% of strange (s¯s) pairs. Equilibrated baryon rich quark matter with various flavour compositions is also studied. In this case only shallow bound states appear in systems with a significant admixture(about 40%) of strange quarks (strangelets). Their binding energies are quite sensitive to the relative strengths of scalar and vector interactions. The common property of all these bound states is that they appear at high particle densities when the chiral symmetry is nearly restored. Thermal properties of meso-matter as well as chemically equilibrated strange quark matter are also investigated. Possible decay modes of these bound states are discussed.

Unlike particle correlations and the strange quark matter distillation process (2002)

Daniel Ardouin Sven Soff Christian Spieles Steffen A. Bass Horst Stöcker D. Gourio Stefan Schramm Carsten Greiner R. Lednicky V. L. Lyuboshits Jean Pierre Coffin C. Kuhn

We present a new technique for observing the strange quark matter distillation process based on unlike particle correlations. A simulation is presented based on the scenario of a two-phase thermodynamical evolution model.

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