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Calendar of Physics Talks Vienna
| The Greatest Discovery - Of interest to Anybody who cares about energy and its impact on environment |
| Speaker: | Jiří Janata (School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, Georgia/USA) |
| Abstract: | The conversion of matter to energy and successful exploitation of nuclear reactions has been a defining discovery in human history. Originally harnessed for purely military purposes, nuclear energy was next utilized for civilian electrical energy production. The latter has become controversial due to several nuclear industrial mishaps. Of these, the Three Mile Island (1979), Chernobyl (1986) accidents, and the more recent Fukushima Daiichi event (2011), have dominated the discussion. The consequences of the military use of fission have been largely ignored; the radiation legacy of the Cold War has been perceived as a thing of the past. In reality, nuclear materials production activities and weapons testing between 1945 and 1998 have introduced more radiation into the biosphere than all civilian mishaps combined. It is estimated that the most notorious Chernobyl accident represents less t |
| Date: | Tue, 15.05.2018 |
| 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. Ulrike Diebold |
| Obtaining a Precise Higgs Boson Transverse Momentum Spectrum |
| Speaker: | Iain Stewart (Massachusetts Institute of Technology) |
| Date: | Tue, 15.05.2018 |
| Time: | 16:15 |
| Duration: | 60 min |
| Location: | Fakultät für Physik, Erwin-Schrödinger-Hörsaal, Boltzmanngasse 5, 5. Stock |
| Contact: | A. Hoang, H. Neufeld |
| Gravitational Shock Waves in stationary Black Hole Spacetimes |
| Speaker: | Albert Huber (TU Wien) |
| Abstract: | In this talk, the geometric framework of local metric deformations will be discussed with special emphasis on so-called generalized Kerr-Schild deformations. The consideration
of precisely these deformations is justified by the fact that they lead to a comparably simple structure of Einstein's field equations, which is demonstrated using the spin-coefficient formalism of Newman and Penrose. Based on the results obtained, it is shown
how the field of a gravitational shockwave generated by a massless point-like particle can be calculated at the event horizon of the stationary Kerr-Newman black hole, while specific physical properties of the corresponding class of geometries are discussed in passing.
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| Date: | Thu, 17.05.2018 |
| Time: | 14:00 |
| Duration: | 60 min |
| Location: | Arbeitsgruppe Gravitation, Währinger Strasse 17, Raum 218, 2. Stock, 1090 Wien |
| Contact: | P.T. Chrusciel, D. Fajman |
| Bottom and charm quark masses from quarkonium at N3LO |
| Speaker: | Vicent Mateu Barreda (University of Salamanca, Spain) |
| Abstract: | The bottomonium spectrum up to n = 3 is studied within Non-Relativistic Quantum Chromodynamics up to N3LO. We consider finite charm quark mass effects both in the QCD potential and the MSbar-pole mass relation up to third. The u = 1/2 renormalon of the static potential is canceled by expressing the bottom quark pole mass in terms of the MSR mass. A careful investigation of scale variation reveals that, while n = 1, 2 states are well behaved within perturbation theory, n = 3 bound states are no longer reliable. Performing a fit to b-bbar bound states we fit for the bottom mass. We extend our analysis to the lowest lying charmonium states to fit for the charm mass. Additionally, using a modified version of the MSR mass with lighter massive quarks we are able to predict the uncalculated O(as^4) virtual massive quark corrections to the relation between the MSbar and pole masses. |
| Date: | Fri, 18.05.2018 |
| Time: | 16:15 |
| Duration: | 60 min |
| Location: | Fakultät für Physik, Erwin-Schrödinger-Hörsaal, Boltzmanngasse 5, 5. Stock |
| Contact: | A. Hoang, H. Neufeld |
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