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Calendar of Physics Talks Vienna
| Self-organised localisation |
| Speaker: | Gian Giudice (CERN, Schweiz) |
| Abstract: | 2nd talk - Erwin-Schroedinger visiting scientist:
The phenomenon of self-organised localisation is presented. When the fundamental parameters of a theory are functions of a scalar field subject to large fluctuations during inflation, quantum phase transitions can act as dynamical attractors.
As a result, the theory parameters are probabilistically localised around the critical value and the Universe finds itself at the edge of a phase transition. Examples will be given in which self-organised localisation accounts for the observed near-criticality of the Higgs self-coupling, the naturalness of the Higgs mass, or the smallness of the cosmological constant. |
| Date: | Tue, 13.06.2023 |
| Time: | 16:15 |
| Duration: | 60 min |
| Location: | Fakultaet fuer Physik, Erwin Schroedinger-HS, Boltzmanngasse 5, 5. Stock |
| Contact: | A. Hoang, H. Neufeld, M. Procura |
| Jet quenching in evolving anisotropic matter |
| Speaker: | Andrey Sadofyev (Santiago de Compostela U., IGFAE) |
| Abstract: | Over the last decades, the theoretical picture of how hadronic jets interact with nuclear matter has been extended to account for the mediumâs finite longitudinal length and expansion. However, only recently a first-principle approach has been developed that allows to couple the jet evolution to the medium flow and anisotropic structure in the dilute limit. In this talk, I will show how to extend this approach to the dense regime, where the resummation of multiple in-medium scatterings is necessary. Particularly, I will consider the modifications of the single particle momentum broadening distribution and single gluon production rate in evolving matter. The resummation is performed by either computing the opacity series or starting from the all order BDMPS-Z formalism. I will also discuss the (novel) resulting modifications to jets' substructure, and briefly mention the effects of mass |
| Date: | Thu, 15.06.2023 |
| Time: | 15:00 |
| Duration: | 60 min |
| Location: | TU Wien, Freihaus, Seminar room 10th floor; Zoom: Meeting ID: 950 0240 9522, Password: please ask via e-mail |
| Contact: | Kirill Boguslavski, Iva Lovrekovic |
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