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Calendar of Physics Talks Vienna
| PARTON SHOWERS AND RESUMMATION FOR BOTTOM FRAGMENTATION IN TOP DECAYS |
| Speaker: | Corcella Gennaro (INFN, Frascati) |
| Abstract: | Im Rahmen des Teilchenphysikseminars: For the sake of performing precise measurements of the top-quark properties,
such as its mass, a reliable description of bottom-quark fragmentation in top
decays is fundamental.
I will discuss the available tools to address b-fragmentation in top decays, namely resummed calculations, based on the perturbative-fragmentation formalism, and parton-shower simulations. The inclusion of non-perturbative corrections will also
be debated and the impact on the uncertainty on the top-mass reconstruction in
a few analyses will be investigated as well.
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| Date: | Tue, 19.04.2016 |
| Time: | 16:15 |
| Duration: | 60 min |
| Location: | Fakultät für Physik, Erwin-Schrödinger-Hörsaal, Boltzmanngasse 5, 5. Stock |
| Contact: | A. Hoang, Y. Wang |
| Understanding unconventional superconductivity and Majorana physics in topological insulators |
| Speaker: | Grigory Tkachov (Universität Würzburg) |
| Abstract: | Topological phases of matter are encountered in many areas of physics, from relativistic quantum field theory to solid state physics.
Recent interest in topological phenomena has been boosted by the discovery of topological insulators (TIs) - electronic materials behaving as an insulator in their interior, while conducting at the surface.
This talk will survey some unconventional properties of hybrid structures comprising TIs and superconductors [1-5].
Their distinctive feature is the broken spin rotation symmetry due to the helical spin polarization of the TI surface or edge states.
To illustrate this point, several examples will be discussed at a general-audience level, including the surface p-wave superconductivity, topological Andreev bound states and Majorana zero modes in the quantum spin-Hall channels. |
| Date: | Wed, 20.04.2016 |
| Time: | 16:00 |
| Duration: | 45 min |
| Location: | Seminarraum DC rot 07 (roter Bereich, 7. OG), Wiedner Hauptstraße 8-10, 1040 Wien |
| Contact: | Andrei Pimenov |
| Large deviations, optimal transport and Newtonian gravitation |
| Speaker: | Yann Brenier (CNRS, CMLS, Ecole Polytechnique, Palaiseau, France) |
| Abstract: | im Rahmen des Literaturseminars der Gravitationsphysik: The Vlasov-Monge-Ampere model, based on optimal transport ideas, is an approximate model for classical (Newtonian) gravitation, closely related to the Zeldovich model in Cosmology. A derivation will be proposed, based on a double application of large deviation principles, from the very elementary stochastic model of a brownian point cloud without interactions. |
| Date: | Thu, 21.04.2016 |
| Time: | 14:00 |
| Duration: | 60 min |
| Location: | Arbeitsgruppe Gravitation, Währinger Strasse 17, Seminarraum A, 2. Stock, 1090 Wien |
| Contact: | H. Rumpf |
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