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Calendar of Physics Talks Vienna
| An Effective Theory for Jet Processes |
| Speaker: | Thomas Becher (Univ. Bern) |
| Abstract: | im Rahmen des Teilchenphysiksemimars: Processes involving narrow jets receive perturbative corrections enhanced by logarithms of the jet opening angle and the ratio of the energies inside and
outside the jets. In my talk I’ll present a new effective field theory which fully
separates the physics at the different energy scales relevant in such processes.
This makes it for the first time possible to systematically resum the logarithmically
enhanced corrections to jet cross section to all orders.
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| Date: | Tue, 08.03.2016 |
| Time: | 16:15 |
| Duration: | 60 min |
| Location: | Fakultät für Physik, Erwin-Schrödinger-Hörsaal, Boltzmanngasse 5, 5. Stock |
| Contact: | A. Hoang, H. Neufeld |
| A Numerical Study of Axisymmetric Stationary Solutions to the Einstein-Vlasov System |
| Speaker: | Ellery Ames (Chalmers, Gothenburg) |
| Abstract: | im Rahmen des Literaturseminars: The Einstein-Vlasov system describes a large collection of collissionless particles interacting via the mean gravitational field, where gravity is modeled by general relativity. Here we present numerical solutions of these equations which are far-from spherically symmetric in the sense that the particle distributions take flattened and toroidal shapes, and the solutions have non-zero net angular momentum. In addition, certain families of solutions are found to contain ergoregions. This talk will include a discussion of the properties of the solutions obtained as well as the numerical methods. |
| Date: | Thu, 10.03.2016 |
| Time: | 14:00 |
| Duration: | 60 min |
| Location: | Arbeitsgruppe Gravitation, Währinger Strasse 17, Seminarraum A, 2. Stock, 1090 Wien |
| Contact: | H. Rumpf |
| Two novel analytic solutions in relativistic hydrodynamics and magneto-hydrodynamics |
| Speaker: | Di-Lun Yang (Theoretical Research Division, RIKEN, Japan) |
| Abstract: | Albeit the success of numerical simulations of hydrodynamics for relativistic heavy ion collisions (HIC), the analytic solutions may provide an intuitive picture in physics, which could be further applied as testbeds for other theoretical models. On the other hand, the direct influence from magnetic fields generated in HIC on the hydrodynamic evolution is less studied both analytically and numerically. In this talk, I will first present a novel solution of relativistic hydrodynamics in 1+3 dimensions which depends on both the transverse coordinate and rapidity. At early times the flow expands dominantly longitudinally in a non-boost-invariant manner, and at late times it expands nearly spherically. Subsequently, I will introduce another new solution in magneto-hydrodynamics in the presence of an external magnetic field following the power-law decay in proper time and with inhomogeneities |
| Date: | Thu, 10.03.2016 |
| Time: | 16:00 |
| Duration: | 60 min |
| Location: | ITP seminar room, 10th floor (yellow tower), TU Wien, Wiedner Hauptstrasse 8-10, A 1040, Vienna |
| Contact: | ayan@hep.itp.tuwien.ac.at |
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