A data centre for cosmological simulations

A data centre for cosmological simulations The aim of the project is to build a data centre for cosmological simulations at the C2PAP and make it available to Excellence Cluster Universe scientists and interested researchers worldwide. Within the Magneticum Pathfinder project, the C2PAP physicists together with experts from the Excellence Cluster Universe and the Leibniz Supercomputing Centre have realized new, elaborate simulations. As a result, the world's largest, hydrodynamic cosmological simulations have been accomplished. They are taking into account the most recent results regarding the three most important cosmic ingredients – the dark energy, the dark matter and the visible matter. Moreover, the scientists incorporated a variety of physical processes in the calculations that are considered particularly important for the development of the visible universe. The most comprehensive simulation within the Magneticum Pathfinder project pursues the development of a record number of 180 billion tiny spatial elements in a previously unreached spatial area of 12.5 billion light years. For the first time, a hydrodynamic cosmological simulation is large enough to be directly compared with large-scale astronomical surveys.

The Magneticum Pathfinder Project: The world's most elaborate cosmological simulation of the evolution of our universe shows the large-scale distribution of matter with their galaxy groups and clusters and the extensive network of Galaxy filaments. (Simulations: Klaus Dolag/LMU)

Rare decay analyses

Within this project, rare decays of B mesons are analysed and investigated to ascertain whether experimentally observed tiny anomalies give evidence of new physics beyond the Standard Model of particle physics. B mesons are pairs of quark-antiquarks, which are composed of at least one bottom quark. They are produced in large particle accelerators and decay after a very short lifetime. Because bottom quarks are more than four times heavier than protons, there are hundreds of different ways of disintegrating into lighter particles. The Standard Model predicts even the scarcest of these decays, thus, B mesons are ideal objects to systematically test the Standard Model. Therefore, the C2PAP experts together with particle physicists of the Excellence Cluster Universe investigate the most recent measurement data from the experiments LHCb, CMS and ATLAS at the Large Hadron Collider (LHC) at CERN, some of which show deviations from the theoretical predictions. These analyses are the most extensive of its kind, because they aim to consider all the relevant theoretical uncertainties. The task requires sophisticated algorithms and powerful computing resources, as are available at the C2PAP data centre.

Technische Universitaet Muenchen
Exzellenzcluster Universe

Boltzmannstr. 2
D-85748 Garching

Tel. + 49 89 35831 - 7100
Fax + 49 89 3299 - 4002