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Calendar of Physics Talks Vienna
| Noncommutative Kähler manifolds and field theory |
| Speaker: | Akifumi Sako (Tokyo University of Science and University of Vienna ) |
| Abstract: | Noncommutative Kähler manifolds are constructed by using a deformation quantization, and classical gauge theories on them are studied.
At first, pedagogical introduction to the deformation quantization is given. It includes the introduction to the Pursel-Shanks’s theorem, the philosophy of the deformation quantization. Next, we study the deformation quantization with separation of variables, given by Karabegov. This is the way to obtain a noncommutative Kähler manifolds by using the deformation quantization. As examples, noncommutative CP^N and CH^N are observed. Then, we consider gauge theories on them. But there is a problem. To avoid the difficulty, the Fock representation is introduced for Noncommutative Kähler manifolds. Using this representation, gauge theories on noncommutative CP^N are discussed again.
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| Date: | Tue, 24.05.2016 |
| Time: | 14:15 |
| Location: | Kleiner Seminarraum, Boltzmanngasse 5, 5. Stock |
| Contact: | Harold Steinacker |
| Erosion of fusion-relevant wall materials under ion bombardment |
| Speaker: | Dipl.-Ing. Bernhard M. Berger (TU Wien, Insitut für Angewandte Physik, AG Atom- und Plasmaphysik) |
| Abstract: | “ITER” - currently under construction in Cadarache/France - will not only be the world’s largest thermonuclear fusion experiment but also the first to produce net energy from fusion. However, to pave the way for a future commercial fusion power plant it is also necessary to have wall components that can withstand the high heat flux and energetic particle bombardment. Within the work program of EUROfusion our group therefore studies the erosion of fusion relevant surfaces under ion impact using a quartz crystal microbalance technique developed at IAP. These studies allow insight into the dynamics of material mixing, erosion phenomena and particle retention processes. |
| Date: | Tue, 24.05.2016 |
| Time: | 16:00 |
| Location: | Technische Universität Wien, Institut für Angewandte Physik, E134 yellow tower „B“, 5th floor, Sem.R. DB gelb 05 B (room number DB05L03) 1040 Wien, Wiedner Hauptstraße 8-10 |
| Contact: | Univ.Prof.Dr. Friedrich Aumayr |
| Interaction of slow highly charged ions with single layer graphene |
| Speaker: | Dipl.-Ing. Elisabeth Gruber (TU Wien, Insitut für Angewandte Physik, AG Atom- und Plasmaphysik) |
| Abstract: | The unique properties of single layer graphene (SLG) can be modified by inducing defects in the honeycomb lattice, either by collisions with energetic particles or by applying external fields. We maximize the latter effect locally by investigating the electronic response of SLG to an extremely large external field, the Coulomb field of an approaching slow highly charged ion (HCI) with charge states up to q=35. Charge exchange and energy loss of the HCI after transmission through freestanding SLG are measured and extremely short charge-equilibration times are found. Additionally, the energy loss of highly charged projectiles is strongly enhanced and increases quadratically with the incident projectile charge state. |
| Date: | Tue, 24.05.2016 |
| Time: | 16:00 |
| Location: | Technische Universität Wien, Institut für Angewandte Physik, E134 yellow tower „B“, 5th floor, Sem.R. DB gelb 05 B (room number DB05L03) 1040 Wien, Wiedner Hauptstraße 8-10 |
| Contact: | Univ.Prof.Dr. Friedrich Aumayr |
| "Confusions in Cascades - Disentangling New Physics in searches at the LHC" |
| Speaker: | Jürgen Reuter (Desy, Hamburg) |
| Abstract: | Motivated by the paradigm of the WIMP miracle of cold dark matter, new physics beyond the Standard Model should be endowed by a discrete symmetry that explains the existence of a neutral stable particle making up the dark matter in the universe. This leads to predictions for very characteristic cascade-like signatures in new-physics events at the Large Hadron Collider (LHC). It will be shown (with a focus on the most prominent example for new physics, Supersymmetry) how different effects can lead to difficulties in disentangling quantum numbers like mass, spin and coupling constants in cascades at the LHC: combinatorics from symmetric vs. asymmetric cascades, QCD radiation, detector effects, off-shell effects from non-vanishing widths of SUSY particles, and confusion due to wrong model assumptions like the presence of exotic particles
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| Date: | Tue, 24.05.2016 |
| Time: | 16:15 |
| Location: | Erwin Schrödinger-Hörsaal, Boltzmanngasse 5, 5. Stock |
| Contact: | H. Neufeld, M. Löschner |
| Jets with ALICE: from vacuum to QCD at high temperatures |
| Speaker: | Dr. Leticia Cunqueiro Mendez (Westfälische Wilhelms-Universität Münster und CERN) |
| Abstract: | The hot and dense medium created in heavy-ion collisions is expected to modify the yield and radiation pattern of jets relative to proton proton collisions. The study of medium-induced modifications in jets aims at the understanding of the detailed mechanisms of in medium energy loss of partons and of fundamental properties of QCD at high temperatures. ALICE measures jets in pp, p–Pb and Pb–Pb collisions, where pp and p–Pb are conceived primarily as a reference for vacuum and cold nuclear effects respectively. The jet program comprises measurements like yields for different resolution R, intra-jet and inter-jet modifications via jet shapes and hadron-jet correlations, path length dependence of energy loss via jet flow v2, hadrochemistry via jet constituent identification, flavour/mass hierarchy of energy loss via ... [full abstract on https://indico.smi.oeaw.ac.at/event/173] |
| Date: | Wed, 25.05.2016 |
| Time: | 17:00 |
| Duration: | 60 min |
| Location: | Stefan-Meyer-Institut, Boltzmanngasse 3, 1090 Wien, Seminarraum 3-2-08 (2. Stock) |
| Contact: | Prof. Dr. Eberhard Widmann, Dr. Martin Simon |
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