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Calendar of Physics Talks Vienna
| Gravitational Wave Astronomy: Listening to the sounds of the dark universe! (Boltzmann Lecture 2018 der Fakultät für Physik, Universität Wien) |
| Speaker: | Karsten Danzmann (MPI for Gravitational Physics –Albert Einstein Institute, Hannover– and Institute for Gravitational Physics at the University of Hannover) |
| Abstract: | For thousands of years we have been looking at the universe with our eyes. But most of the universe is dark and will never be observable with electromagnetic waves. Since September 14th, 2015, everything is different: Gravitational waves were discovered! We have obtained a new sense and finally we can listen to the dark side of the universe. The first sounds that we heard were from unexpectedly heavy Black Holes. And nobody knows what other dark secrets are waiting for us out there. |
| Date: | Mon, 19.11.2018 |
| Time: | 17:00 |
| Location: | Fakultät für Physik, Universität Wien, Lise-Meitner-Hörsaal, 1. Stock, Haupteingang: Strudlhofgasse 4, 1090 Wien |
| Contact: | Dekanat der Fakultät für Physik, Universität Wien |
| Asymptotic symmetries of three-dimensional black strings |
| Speaker: | Céline Zwikel (TU Wien) |
| Abstract: | Im Rahmen des Seminars für Mathematische Physik: In three-dimensional pure gravity, there are no asymptotically flat black holes. However, once matter is present, richer geometries appear: it is the case for the Horne-Horowitz black string and its generalisation. During this talk, I will present the first set of consistent boundary conditions which include the black string and leads to finite, integrable and conserved charges. The asymptotic symmetry algebra consists in a Witt algebra supplemented by three global u(1) charges. In the last part of the talk, I will discuss the thermodynamics of these solutions and point out some peculiar features of this system. |
| Date: | Tue, 20.11.2018 |
| Time: | 13:45 |
| Duration: | 60 min |
| Location: | Fakultät für Physik, Erwin-Schrödinger-Hörsaal, Boltzmanngasse 5, 5. Stock |
| Contact: | S. Fredenhagen, D. Grumiller |
| Prospects for the LHC and the CERN accelerator complex post 2020 |
| Speaker: | Verena Kain (CERN, Schweiz) |
| Abstract: | im Rahmen des Seminars für Teilchenphysik |
| Date: | Tue, 20.11.2018 |
| Time: | 16:15 |
| Duration: | 60 min |
| Location: | Fakultät für Physik, Erwin-Schrödinger-Hörsaal, Boltzmanngasse 5, 5. Stock |
| Contact: | H. Neufeld |
| Far-from-equilibrium dynamics and spectral functions |
| Speaker: | Kirill Boguslavski (Univ. Jyväskylä) |
| Abstract: | In recent years, there have been important advances in understanding the far-from-equilibrium dynamics in different physical systems ranging from ultra-relativistic heavy-ion collisions to ultra-cold atoms.
Classical universal attractors, also known as non-thermal fixed points, play a crucial role in the weak-coupling descriptions of the respective far-from-equilibrium dynamics. In this talk, we will discuss
these phenomena and some phenomenologically relevant open questions in these systems, especially for the initial stages in heavy-ion collisions. A new method to extract the spectral function numerically is a
particularly promising tool to better understand their microscopic properties and to address these open questions. |
| Date: | Wed, 21.11.2018 |
| Time: | 11:00 |
| Duration: | 60 min |
| Location: | Institute for Theoretical Physics, TU Wien, Seminar room 10th floor (yellow area), Wiedner Haupstr. 8-10, 1040 |
| Contact: | Anton Rebhan |
| Constraining extended scalar sectors at the LHC and beyond |
| Speaker: | Tania Robens (Theoretical Physics Division, Rudjer Boskovic Institute, Zagreb) |
| Abstract: | Since the discovery of a Higgs Boson in July 2012, particle physics has entered an exciting era. One immediate question which we hope to answer is whether
the discovered boson indeed corresponds to the Higgs Boson of the Standard Model, or whether it is a constituent of a more involved Higgs sector containing
additional matter content. In this talk, I will discuss two such models, i.e. a relatively simple model where the SM Higgs sector is enhanced by an additional
scalar which is a singlet under all SM gauge groups, as well as the Inert doublet model, a two Higgs doublet model containing a dark matter candidate.
I will present valid regions of the models’ parameter space after theoretical as well as experimental constraints have been taken into account; for the latter,
I include collider, electroweak precision, as well as astroparticle data when applicable. |
| Date: | Wed, 21.11.2018 |
| Time: | 14:00 |
| Duration: | 60 min |
| Location: | HEPHY Library, Nikolsdorfer Gasse 18, 1050 Wien |
| Contact: | helmut.eberl@oeaw.ac.at |
| Open heavy-flavour studies with the ALICE experiment at the LHC |
| Speaker: | Dr. Elisa Meninno (University and INFN Salerno / CERN) |
| Abstract: | According to perturbative Quantum Chromo Dynamics (pQCD) calculations,strongly interacting matter at very high temperatures and/or densities exists in a particular state, called Quark-Gluon Plasma (QGP), with deconfined quarks and gluons. Such conditions of high temperatures and densities prevailed in the early universe, a few mi- croseconds after the big bang. Heavy quarks (charm and beauty) are a powerful tool to study the properties of QGP, formed in heavy-ion collisions at the LHC. Because of their large masses, heavy quarks are produced in initial hard-scattering processes, and they subsequently experience the whole system evolution, interacting with the medium constituents.
The measurement of the nuclear modification factor of ... [full abstract https://indico.smi.oeaw.ac.at/event296] |
| Date: | Wed, 21.11.2018 |
| 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 |
| Linear local gauge-invariant observables on spacetimes of sub-maximal symmetry |
| Speaker: | Igor Khavkine (Prague University) |
| Abstract: | The Killing operator $K_{ab}[v]=\nabla_a v_b + \nabla_b v_a$ is the generator of gauge symmetries (linearized diffeomorphisms) $h_{ab}\mapsto h_{ab} + K_{ab}[v]$ in linearized gravity. A linear local gauge-invariant observable is a differential operator $I[h]$ such that $I[K[v]] = 0$ for any gauge parameter field $v_a$. A set $\{I_i[h]\}$ of such observables is complete if the simultaneous conditions $I_i[h] = 0$ are sufficient to conclude that the argument is a pure gauge mode, $h_{ab} = K_{ab}[v]$. The explicit knowledge of a complete set of local gauge invariant observables has multiple applications from the points of view of both physics and geometry, whenever a precise separation of physical and gauge degrees of freedom is required. Surprisingly, until very recently, such complete sets have been known explicitly only on spacetimes of maximal symmetry (Minkowski or (anti-)de Sitter). |
| Date: | Thu, 22.11.2018 |
| Time: | 14:00 |
| Duration: | 60 min |
| Location: | Arbeitsgruppe Gravitation, Währinger Strasse 17, Raum 218, 2. Stock, 1090 Wien |
| Contact: | P.T. Chrusciel, D. Fajman |
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