Calendar of Physics Talks Vienna

Localization of Infinite Spin Observables
Speaker:Christian Köhler (Unv. Wien)
Abstract:im Rahmen des Seminars für Mathematische Physik
Date: Tue, 03.06.2014
Time: 14:15
Duration: 60 min
Location:Fakultät für Physik, Erwin-Schrödinger-Hörsaal, Boltzmanngasse 5, 5. Stock
Contact:J. Yngvason, J. Schlemmer

Renormalization of a toy model with spontaneously broken symmetry
Speaker:Leyre Nogues (Univ. Wien)
Abstract:im Rahmen des Teilchenphysikseminars
Date: Tue, 03.06.2014
Time: 16:15
Duration: 60 min
Location:Fakultät für Physik, Erwin-Schrödinger-Hörsaal, Boltzmanngasse 5, 5. Stock
Contact:A. Hoang

Inhomogeneous phases in dense strongly interacting matter - a generic phenomenon?
Speaker:Prof. Dirk Rischke (Goethe University Frankfurt, Germany)
Abstract:Calculations within QCD-inspired models as well within QCD in the large-N_c limit show that dense quark matter features inhomogeneous phases. The order parameter for chiral symmetry breaking varies periodically, in the form of a chiral density wave ("chiral spiral") or in the functional form of a Jacobi elliptic function. In this talk, I will demonstrate that this phenomenon also occurs in an effective chiral model with purely hadronic degrees of freedom. The parameters of the model are adjusted to give a reasonable fit of hadron vacuum properties. The model is also able to reproduce nuclear matter saturation properties. We find that, above a density of about 2.4 times the nuclear matter ground state density, an inhomogeneous phase sets in, where the chiral order parameter varies in the form of a chiral density wave. Thus, inhomogeneous phases seem to be a generic feature of high-density strongly interacting matter.
Date: Thu, 05.06.2014
Time: 12:15
Duration: 60 min
Location:TU Wien, Seminar room 138 C (9th floor, yellow section)
Contact:Andreas Schmitt

The galactic center
Speaker:Grischa Karssen (Köln)
Abstract:im Rahmen des Literaturseminars für Gravitationsphysik
Date: Thu, 05.06.2014
Time: 14:00
Duration: 120 min
Location:ACHTUNG: Erwin Schrödinger Institut, Boltzmanngasse 9, 1090 Wien
Contact:P.T. Chrusciel

Variable flavor number schemes in QCD
Speaker:Piotr Pietrulewicz (Univ. Wien)
Abstract:Abstract: In this talk I will illustrate how to include heavy quark effects in QCD processes with various dynamical scales. The resulting mass factorization theorems resum all large logarithms and can account for arbitrary hierarchies between the mass scale and the kinematic scales. Specific examples covered are the hadronic R-ratio, deep-inelastic scattering and event shapes
Date: Thu, 05.06.2014
Time: 14:15
Location:Kurt-Gödel-Hörsaal, Boltzmanngasse 5/Strudlhofgasse 4, Erdgeschoss
Contact:A. Hoang

Habilitationskolloquium: Yoctosecond dynamics of the quark-gluon plasma
Speaker:Andreas Ipp (TU Wien)
Abstract:The quark-gluon plasma (QGP) is an ultra-relativistic state of matter which can be realized experimentally in particle accelerators like RHIC or LHC for the duration of a few yoctoseconds. It is characterized by very high temperatures at which neutrons, protons, and pions are melted into their constituents, the quarks and gluons. In this talk, I will present selected topics of my research which is largely devoted to the theoretical understanding of thermodynamic properties of the QGP. I will also outline how dynamical plasma effects at the yoctosecond timescale, like plasma instabilities, can be accessed in numerical simulations.
Date: Thu, 05.06.2014
Time: 16:00
Duration: 60 min
Location:TU Wien, Wiedner Hauptstr. 8-10, FH HS 5, 2. Stock (grüner Bereich)
Contact:Anton Rebhan

: "Approaching the standard model from the matrix model or N=4 SYM"
Speaker:Harold Steinacker (Univ. Wien)
Abstract:We find a simple brane configuration in the IKKT matrix model which resembles the standard model at low energies, with a second Higgs doublet and right-handed neutrinos. The electroweak sector is realized geometrically in terms of two minimal fuzzy ellipsoids, which can be interpreted in terms of four D0 branes in the extra dimensions. The electroweak Higgs connects the D0 branes and is an indispensable part of the geometry. Fermionic would-be zero modes arise at the intersections with two larger branes, leading precisely to the correct chiral matter fields at low energy, along with right-handed neutrinos which can acquire a Majorana mass due to a Higgs singlet. The larger branes give rise to SU(3)c, extended by U(1)B and another U(1) which are anomalous at low energies and expected to disappear. At higher energies, mirror fermions and additional fields arise, completing the full N=4 sup
Date: Fri, 06.06.2014
Time: 13:45
Location:Erwin Schrödinger-Hörsaal, Boltzmanngasse 5, 5. Stock
Contact:Jakob Yngvason