Observation of String Breaking in QCD

We numerically investigate the transition of the static quark-antiquark string into a static-light meson-antimeson system. Improving noise reduction techniques, we are able to resolve the signature of string breaking dynamics for n_f=2 lattice QCD at zero temperature. This result can be related to properties of quarkonium systems. We also study short-distance interactions between two static-light mesons.Comment: 27 pages, 22 figures, changed decimal place of errors in 3 entries of Table, corrected reference

This document is under the terms of the CC-BY-NC-ND Creative Commons Attribution Requirements and Design of a Collaborative Online Visualization and Steering Framework for Grid and e-Science infrastructures

Many production e-Science infrastructures (e.g. DEISA, D-Grid) have begun to offer a wide variety of services for end-users during the past several years. Many e-Scientists solve their scientific problems by using parallel computing applications on clusters and collaborative online visualization and steering (COVS) is known as a tool for analyzing and better understanding of these applications. In absence of a widely accepted COVS framework within Grids, visualizations are often created using proprietary technologies assuming a dedicated scenario. This makes it feasible to analyze the usual requirements to provide a blueprint for a more general COVS framework that can be integrated into Grid middleware systems such as UNICORE, gLite, or Globus Toolkits. These requirements lead to a design that was successfully implemented as a higher-level service in UNICORE and presented at numerous places such as the Open Grid Forum 19 and 20, Europar 2006, Supercomputing 2006 and DEISA trainings.

Die Gaststudenten und ihre Betreuer waren:

Computing (NIC) und hiermit des ZAM als wesentlicher Säule des NIC. Um den akademischen Nachwuch