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Calendar of Physics Talks Vienna
| 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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