Calendar of Physics Talks Vienna

SUSY through the eyes of LHC
Speaker:Sezen Sekmen (HEPHY-SMI Seminar on fundamental interactions and symmetries)
Abstract:The LHC has yet seen no sign of new physics. Our current task is to understand the impact of this absence on the candidate new phy- sics models. Supersymmetry stands out as a very well-motivated new physics model, but it is a generic idea that has diverse rea- lizations. Still, most of this diversity can be addressed by a suf- ficiently generic 19-dimensional parameterization of the MSSM, called the phenomenological MSSM (pMSSM) which captures a wide range of the supersymmetry phenomenology. In this talk, I will introduce the pMSSM, and describe the global Bayesian analysis we did that allowed us to draw generic conclusions on how the current data constrain the MSSM. Such an analysis also provides us input for designing the next phase of the LHC SUSY searches.
Date: Wed, 03.04.2013
Time: 11:00
Duration: 60 min
Location:Nikolsdorfer Gasse 18, 1050 Wien, Library, 1. Floor
Contact:Ken Suzuki ken.suzuki@oeac.at.at

On-line high precision mass measurements of rare isotopes using highly charged ions
Speaker:Martin SIMON (TRIUMF, TITAN, Canada National Laboratory for Particle and Nuclear Physics, Vancouver)
Abstract:Precise knowledge of the masses of stable and radioactive nuclei is of importance in various field of physics from stellar nucleosynthesis to neutrino physics and also fundamental tests of the standard model. TRIUMF’s Ion Trap for Atomic and Nuclear science (TITAN) at the rare beam facility ISAC in Vancouver is currently the only operational Penning trap mass spectrometer where short-lived isotopes are charge bred in an electron beam ion trap in order to increase the precision of mass measurements. High efficiencies and short charge breeding times are crucial in order to maintain this precision boost. The principles of Penning trap mass spectrometry will be introduced with a special focus on the challenges and opportunities arising from the use of radioactive nuclides in high charge states. The most convincing results will be discussed, namely the mass measurement of the superallowed beta-emitter 74Rb with a half life of 65ms, which contributes to the unitarity test of the quark-mixing matrix, and the Q-value measurement of 71Ga-71Ge, which is of particular interest in solar neutrino physics since gallium was the detector material of the GALLEX and SAGE experiments.
Date: Fri, 05.04.2013
Time: 15:30
Location:Atominstitut, Hörsaal, Stadionallee 2, 1020 Wien
Contact:T. Schumm