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Calendar of Physics Talks Vienna
| C-Parameter with Massive Quarks |
| Speaker: | Moritz Preißer (Univ. Wien) |
| Abstract: | In recent years event-shapes for electron-positron annihilation to hadrons, such as thrust
or the C-parameter, have been studied using Soft-Collinear Effective Theory (SCET).
Within this framework it is possible to derive factorization theorems which allow to
systematically resum occuring large logarithms. Using these methods it is possible to
extract precise values for the strong coupling constant from experimental data.
Traditionally this was done treating the involved particles as massless. In this talk
I will therefore discuss primary heavy quark mass-effects in C-parameter studies.
First I will introduce the used observable and give a brief review of SCET.
Afterwards details on a recent calculation of the massive differential cross-section in QCD and SCET are shown. |
| Date: | Tue, 28.10.2014 |
| Time: | 16:15 |
| Duration: | 60 min |
| Location: | Fakultät für Physik, Erwin-Schrödinger-Hörsaal, Boltzmanngasse 5, 5. Stock |
| Contact: | A. Hoang, H. Neufeld |
| AdS/CFT and Brownian Motion in anisotropic plasma |
| Speaker: | Shankhadeep Chakrabortty (IISER Pune) |
| Abstract: | We employ methods of gauge/string duality to analyze the Brownian motion and the concomitant Langevin equation of a heavy quark in a strongly coupled, thermal, anisotropic Yang-Mills plasma. We consider fluctuations both along and perpendicular to the direction of anisotropy and study the effects of anisotropy on the drag coefficient, the diffusion constant and the Langevin coefficient for both the directions. We also verify the fluctuation-dissipation theorem for Brownian motion in an anisotropic medium.
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| Date: | Thu, 30.10.2014 |
| Time: | 16:00 |
| Duration: | 60 min |
| Location: | SEM 136, TU Wien, Freihaus, 10th floor (Wiedner Hauptstr. 8-10, A-1040 Vienna) |
| Contact: | Daniel Grumiller |
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