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Calendar of Physics Talks Vienna
| Scalar and other mesons in vacuum |
| Speaker: | Denis Parganlija (Vienna University of Technology) |
| Abstract: | Scalar mesons have been one of the most hotly debated issues of
low-energy QCD for decades. Experimental data show the existence of six
scalar isosinglet states -- next to the famous sigma meson, there are five
states with the same quantum numbers but higher energies than the energy
of the sigma. If we consider the u and d quarks as degenerate and work in
a theoretical framework that inlcudes strange states as well, then we can
construct two scalar \bar q - q states. Thus constructed scalars can, of
course, describe at most two out of the mentioned six experimentally known
states - but the question is: Which two? I will present a model with
(pseudo)scalar and (axial-)vector mesons that allows us to pursue an
answer to this question. Order parameters with scalar (and other) mesons
for the chiral transition will also be briefly discussed. |
| Date: | Tue, 06.03.2012 |
| Time: | 12:30 |
| Duration: | 60 min |
| Location: | Boltzmanngasse 5, 5th floor, Schrödinger HS / large seminar room |
| Contact: | Vienna Theory Lunch Seminar (http://www.univie.ac.at/lunch-seminar/index.htm) |
| Mission to Mars – Why is Mars not a blue planet? |
| Speaker: | Prof. Dr. Franz Renz |
| Abstract: | Since ages, the red planet Mars is a source of inspiration and a target for scientific interests. Currently the Mars is under experimental
investigation, among them are the NASA Mars Exploration Rovers Spirit and Opportunity. Recent iron chemical results indicate that Mars
was a blue planet but why is he not anymore? This and more scientific results from Mars will be discussed and its capability as a reference
model for our planet earth. This shed light on, where we are coming from and going to. |
| Date: | Tue, 06.03.2012 |
| Time: | 17:30 |
| Duration: | 60 min |
| Location: | Lise-Meitner Hörsaal, Universität Wien, 1090 Wien, Strudlhofgasse 4 / Boltzmanngasse 5, 1.Stock |
| Contact: | christl.langstadlinger@univie.ac.at |
| On the 100th anniversary of the Sackur - Tetrode equation |
| Speaker: | Walter Grimus (Fakultät für Physik) |
| Abstract: | im Rahmen des Teilchenphysikseminars |
| Date: | Thu, 08.03.2012 |
| Time: | 14:15 |
| Duration: | 60 min |
| Location: | Fakultät für Physik, Erwin Schrödinger-Hörsaal, Boltzmanngasse 5, 5. Stock, 1090 Wien |
| Contact: | H. Neufeld |
| "(Weak) solutions of (generalized) fluids" |
| Speaker: | Robert Beig (Fakultät für Physik) |
| Abstract: | im Rahmen des Literaturseminars |
| Date: | Thu, 08.03.2012 |
| Time: | 14:15 |
| Duration: | 60 min |
| Location: | Arbeitsgruppe: Gravitation, Währinger Strasse 17, Seminarraum A, 2. Stock |
| Contact: | R. Beig |
| RG analysis on chiral symmetry in a strong magnetic field |
| Speaker: | Kenji Fukushima (Keio University) |
| Abstract: | A strong magnetic field enhances the chiral condensate,
which is known as the Magnetic Catalysis. In a chiral model
the Magnetic Catalysis results from a simple mean-field
calculation. In this talk I will explain how to understand this
phenomenon in terms of the RG flow of the four-point
vertex. In this way it will also become evident that medium
effects such as finite temperature and density significantly
weaken the Magnetic Catalysis. Finally I will discuss meson
effects including some speculative ideas.
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| Date: | Thu, 08.03.2012 |
| Time: | 15:00 |
| Duration: | 60 min |
| Location: | Institut f. Theoret. Physik, TU Wien, SEM 136, Wiedner Hauptstr., 10th floor |
| Contact: | Anton Rebhan (TU Wien) |
| Yang-Mills thermodynamics from the Gribov horizon |
| Speaker: | Nan Su (Univ. Bielefeld) |
| Abstract: | In this talk I will report the motivation and progress of a 1-loop calculation of Yang-Mills thermodynamic potential using the Gribov-Zwanziger framework which cuts off the Gribov horizon in the gauge fixing. The Gribov mass parameter can be solved self-consistently via a nonperturbative horizon condition and the result turns out to be of the order g^2T, i.e. the same order as the magnetic scale. As a consequence the 1-loop thermodynamic potential already contains contributions from the nonperturbative magnetic scale. Different from the conventional Faddeev-Popov gauge fixing case where the vacuum part is discarded in the normalization, there are scale dependent divergences coming from the vacuum part which have to be regularized. The Gribov-Zwanziger framework may provide a perturbative scheme which is able to incorporate (part of) the nonperturbative magnetic contributions.
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| Date: | Fri, 09.03.2012 |
| Time: | 11:00 |
| Duration: | 60 min |
| Location: | Institut f. Theoret. Physik, TU Wien, SEM 136, Wiedner Hauptstr., 10th floor |
| Contact: | Anton Rebhan (TU Wien) |
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