|
Calendar of Physics Talks Vienna
| Unconventional D-branes on T^4 |
| Speaker: | Jakub Vošmera (Institute of Physics of the Czech Academy of Sciences, Prague) |
| Abstract: | We show that apart from the conventional Dp-branes and their supersymmetric bound states, the weakly coupled type II superstring compactified on a 4-torus admits new stable non-BPS fundamental D-branes. We construct the corresponding elementary superconformal boundary states at special values of closed string moduli for which the worldsheet theory admits a Gepner-like description and check a number of BCFT consistency conditions. The open string spectrum of these new non-BPS D-branes is tachyon free despite the fact that they carry no RR charges. New explicit superconformal boundary states for certain 1/4-BPS bound states of Dp-branes are also found. |
| Date: | Tue, 25.06.2019 |
| Time: | 13:45 |
| Duration: | 60 min |
| Location: | TU Wien, Wiedner Hauptstraße 8, Yellow Area, 9th floor, Seminar Room DB 09 E23 |
| Contact: | S. Fredenhagen, D. Grumiller |
| Symmetry-breaking with competition and the Little Hierarchy |
| Speaker: | Michael E. Peskin (SLAC, Stanford University) |
| Abstract: | 5. Vorlesung im Rahmen der Erwin-Schrödinger-Gastprofessur 2019 |
| Date: | Tue, 25.06.2019 |
| Time: | 16:15 |
| Duration: | 60 min |
| Location: | Fakultät für Physik, Erwin-Schrödinger-Hörsaal, Boltzmanngasse 5, 5. Stock |
| Contact: | A. Hoang, H. Neufeld |
| Challenges and Rewards of Neutrino Hunting |
| Speaker: | Prof. Cristiano Bozza (Università degli Studi di Salerno) |
| Abstract: | Neutrinos are the most elusive among known particles. Detecting them for the first time took more than two decades. Confirming Bruno Pontecorvo's oscillation hypothesis took more than five decades and earned a Nobel prize in 2015. After a short summary of neutrino properties, the seminar will present two thriving experimental research lines. First, the picture of neutrino oscillations is still incomplete, and the experiments in the next decade are expected to answer some fundamental questions. Second, neutrinos are themselves excellent probes of physics at the largest scales and in deep space. In these years, we are witnessing the birth and first steps of neutrino astronomy. Unexpected discoveries and the first multimessenger observations of astrophysical objects are exciting challenges that call for cooperation of diverse communities of scientists. |
| Date: | Wed, 26.06.2019 |
| 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 |
|