New results for hadronic collisions in the framework of the Parton-Based Gribov-Regge Theory

We recently proposed a new approach to high energy nuclear scattering, which treats hadronic collisions in a sophisticated way. Demanding theoretical consistency as a minimal requirement for a realistic model, we provide a solution for the energy conservation, screening problems and identical elementary interactions, the so-called "Parton-Based Gribov-Regge Theory" including enhanced diagrams. We can now present some of our results for SPS and RHIC energies.Comment: 4 pages, 3 figures, To appear in the proceedings of Quark Matter 2002 (QM 2002), Nantes, France, 18-24 Jul 200

Resistência à penetração e rendimento da soja após intervenção mecânica em latossolo vermelho sob plantio direto.

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Low-lying Dirac eigenmodes and monopoles in 3+1D compact QED

We study the properties of low-lying Dirac modes in quenched compact QED at $\beta =1.01$, employing $12^3\times N_t$ ($N_t =4,6,8,10,12$) lattices and the overlap formalism for the fermion action. We pay attention to the spatial distributions of low-lying Dirac modes below and above the ``phase transition temperature'' $T_c$. Near-zero modes are found to have universal anti-correlations with monopole currents, and are found to lose their temporal structures above $T_c$ exhibiting stronger spatial localization properties. We also study the nearest-neighbor level spacing distribution of Dirac eigenvalues and find a Wigner-Poisson transition.Comment: 10 pages, 10 figures, 1 tabl

Initial Condition for QGP Evolution from NEXUS

We recently proposed a new approach to high energy nuclear scattering, which treats the initial stage of heavy ion collisions in a sophisticated way. We are able to calculate macroscopic quantities like energy density and velocity flow at the end of this initial stage, after the two nuclei having penetrated each other. In other words, we provide the initial conditions for a macroscopic treatment of the second stage of the collision. We address in particular the question of how to incorporate the soft component properly. We find almost perfect "Bjorken scaling": the rapidity coincides with the space-time rapidity, whereas the transverse flow is practically zero. The distribution of the energy density in the transverse plane shows typically a very "bumpy" structure.Comment: 17 pages, 24 figure

NeXSPheRIO results on elliptic flow at RHIC and connection with thermalization

Elliptic flow at RHIC is computed event-by-event with NeXSPheRIO. Reasonable agreement with experimental results on $v_2(\eta)$ is obtained. Various effects are studied as well: reconstruction of impact parameter direction, freeze out temperature, equation of state (with or without crossover), emission mecanism.Comment: Contribution to the Proceedings of the Quark-Gluon Plasma Thermalization workshop. Content slightly increase

Die Unabhängigkeit des Abschlussprüfers:eine Untersuchung der europäischen und deutschen Gesezeslage unter Berücksichtigung des IESBA Code of Ethics und der neuesten Reformvorhaben der EU-Kommission

Die Abschlussprüfung soll sicherstellen, dass die wirtschaftliche Lage eines Unternehmens korrekt dargestellt wird und so das Vertrauen aller Interessengruppen eines Unternehmens stärken. Da sich dies nur durch eine objektive und kritische Abschlussprüfung erreichen lässt, bedarf es einer ausreichenden Unabhängigkeit des Abschlussprüfers gegenüber seinem Mandanten. Diese wiederum ist aufgrund einer Reihe von Bilanzskandalen und Firmenpleiten im In- und Ausland Anfang des letzten Jahrzehnts, aber auch in der näheren Vergangenheit, nicht nur Gegenstand heftiger internationaler Debatten, sondern auch einer Vielzahl von Reformen. Im Mittelpunkt der vorliegenden Arbeit stehen die internationalen und nationalen Vorschriften, die einer Gefährdung der Unabhängigkeit des Prüfers, also dessen Befangenheit, entgegenwirken sollen. Dabei werden die neuesten Reformvorhaben der EU-Kommission zur Abschlussprüfung gesondert dargestellt sowie analysiert und der bestehende Handlungsbedarf des nationalen Gesetzgebers bei deren Umsetzung aufgezeigt

Remnant Break-up and Muon Production in Cosmic Ray Air Showers

We discuss the relation between remnant fragmentation in inelastic high-energy hadronic interactions and muon production in extensive cosmic ray air showers. Using a newly developed tool, a simple and flexible hadronic event generator, we analyze the forward region of hadronic interactions. We show that measurements of the Feynman-x distribution in the beam fragmentation region at LHCf will be key to understanding muon production in air showers quantitatively.Comment: 6 pages, 6 figure

Strange Particles from NEXUS 3

After discussing conceptual problems with the conventional string model, we present a new approach, based on a theoretically consistent multiple scattering formalism. First results for strange particle production in proton-proton scattering at 158 GeV and at 200 GeV (cms) are discussed.Comment: invited talk, given at the Strange Quark Matter Conference, Atlantic Beach, North Carolina, March 12-17, 200