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Calendar of Physics Talks Vienna
| Phases of fuzzy field theories |
| Speaker: | Juraj Tekel (Univ. Bratislava) |
| Abstract: | im Rahmen des Seminars für Mathematische Physik: We will discuss
history and recent developments in the study of the phase structure of
noncommutative scalar fields. Apart from the usual disorder and uniform
order phases, the theory exhibits a third phase, which survives the
commutative limit. This is connected to the UV/IR mixing of the
noncommutative theory. We will rewrite the fuzzy theory as a modified
quartic matrix model, with extra multitrace terms in the action and
perform saddle point analysis of the theory. Our goal will be to locate
the triple point of the theory and to reconstruct the numerically
obtained phase diagram. This goal will be successfully reached at the
end of the talk.
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| Date: | Tue, 24.03.2015 |
| Time: | 14:15 |
| Location: | Fakultät für Physik, Erwin-Schrödinger-Hörsaal, Boltzmanngasse 5, 5. Stock |
| Contact: | H. Steinacker |
| The Topology of the Universe from the Cosmic Microwave Background Temperature and Polarization |
| Speaker: | Prof. Aneesh V. Manohar (University of California, San Diego) |
| Abstract: | 4. Vorlesung der Schrödinger-Gastprofessur: The talk discusses constraints on the global topology of the universe from CMB data,
in particular constraints on torus topologies T^3, T^2 x R and
S^1 x R^2. The theoretical predictions are compared with experimental
CMB data.
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| Date: | Tue, 24.03.2015 |
| Time: | 16:15 |
| Duration: | 60 min |
| Location: | Fakultät für Physik, Erwin-Schrödinger-Hörsaal, Boltzmanngasse 5, 5. Stock |
| Contact: | A. Hoang, P.T. Chrusciel |
| K– four nucleon absorption process studies through the Λt channel |
| Speaker: | Ivana Tucakovic (INFN-Frascati) |
| Abstract: | The study of the low-energy negatively charged kaons interactions with the nuclear matter will be presented. In particular, the interactions of the kaons produced at the DAΦNE collider with the He nuclei present in the drift chamber gas and with the C nuclei contained in the drift chamber wall of the KLOE detector, generating the Λt final state are studied.
This channel gave us the possibility to investigate the K- four nucleon absorption (4NA), a process which is barely studied by other experimental and theoretical works.
Dedicated MC simulations of the 4NA of the K- in He and C are performed and the experimentally extracted invariant mass, momentum and angular distributions spectra were fitted, in order to obtain for the first time the absolute value of the BR and the σ (100 MeV/c) for the 4NA process leading to the Λt pair in the final state. |
| Date: | Wed, 25.03.2015 |
| Time: | 17:00 |
| Duration: | 60 min |
| Location: | Stefan-Meyer-Institut Hörsaal (2.08), Boltzmanng. 3, 1090, Wien |
| Contact: | Ken Suzuki |
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