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Calendar of Physics Talks Vienna
| Speaker: | Massimo Taronna (Naples U.) |
| Abstract: | In this talk I will explain some recent efforts that aim to understand the rules of the game for observables on the future boundary of dS space. Unlike in AdS, the boundaries of dS space are purely spatial with no standard notion of locality and time. This obscures how the boundary observables capture a consistent picture of unitary time evolution in the interior of dS space. I will explain how, despite this difference, the structural similarities between dS and AdS spaces allow to draw relations between boundary correlators in these two space-times. This can be used to import techniques, results and understanding from AdS to dS.
ZOOM: https://tuwien.zoom.us/j/95423793232?pwd=OEhvemhuaUcvbTVYS0gwV3F3amNidz09
IDde réunion : 954 2379 3232
Motde passe : Gya7QquF |
| Date: | Tue, 03.05.2022 |
| Time: | 14:00 |
| Duration: | 60 min |
| Location: | ZOOM: https://tuwien.zoom.us/j/95423793232?pwd=OEhvemhuaUcvbTVYS0gwV3F3amNidz09 |
| Contact: | D. Grumiller, S. Fredenhagen, E. Battista, R. Ruzziconi |
| Resummation of Super-Leading Logarithms |
| Speaker: | Matthias Neubert (Universität Mainz) |
| Abstract: | Jet cross sections at high-energy colliders exhibit intricate patterns of logarithmically enhanced higher-order corrections.
In particular, so-called non-global logarithms emerge from soft radiation emitted off energetic partons inside jets.
While this is a single-logarithmic effect at lepton colliders, at hadron colliders phase factors in the amplitudes lead to
double-logarithmic corrections starting at four-loop order. This effect was discovered a long time ago, but not much is known
about the higher-order behavior of these terms and their process dependence.
We derive, for the first time, the all-order structure of these ``super-leading logarithms'' for generic $2\to l$ scattering processes
at hadron colliders and resum them in closed form. |
| Date: | Tue, 03.05.2022 |
| Time: | 16:15 |
| Duration: | 60 min |
| Location: | Fakultät für Physik, Boltzmanngasse 5, 5. Stock - Erwin-Schrödinger-Hörsaal also via Zoom https://univienna.zoom.us/j/93427906843?pwd=YjhSejdUVW16QjVQYUh5TVNSNFNhQT09 Meeting ID: |
| Contact: | A. Hoang, M. Procura |
| The geometrical manifestation of gravity |
| Speaker: | Lavinia Heisenberg (ETH Zurich) |
| Abstract: | General Relativity and the Cosmological Principle are the fundamental pillars of Cosmology. After introducing them and their underlying properties
I will discuss the successes and challenges of the Standard Model of Big Bang Cosmology. I will then discuss how we can test General Relativity using
different cosmological observations, from its geometrical properties down to testing the involved propagating degrees of freedom.
This analysis will also help us to classify the attempts of going beyond General Relativity together with their explicit implications. |
| Date: | Thu, 05.05.2022 |
| Time: | 15:00 |
| Duration: | 60 min |
| Location: | ZOOM https://univienna.zoom.us/j/6540036841?pwd=SytyVkZJZzNyRG9lMm13ejlHeHRRUT09 |
| Contact: | P. Chrusciel, D. Fajman |
| Contribution to CTA research by ALPs-photons mixing |
| Speaker: | Christian Diaz-Bahamondes (Pontificia Universidad Católica de Chile) |
| Abstract: | Beyond the Standard Model, there are the so-called axion-like particles (ALPs) can be a candidate to constitute a portion of the non-baryonic cold dark matter. These particles acquire an effective coupling with the photons and can oscillate between them. So one way to test indirect detection for these new models of physics is to occupy the gamma-rays from far objectives. From these sources to Earth, exist a non-zero probability to convert photons into axion by magnetic field interaction, providing a different flux to arrive. For beams above GeV, they produce a particle cascade with a Cherenkov Radiation which can be detected by the telescope on Earth. One of them is the Cherenkov Telescope Array (CTA). What is our goal? We want to understand the real potential of CTA detection with ALPs.
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| Date: | Thu, 05.05.2022 |
| Time: | 16:30 |
| Duration: | 60 min |
| Location: | TU Wien, Freihaus, Sem.R. DB gelb 09 |
| Contact: | Iva Lovrekovic, Benjamin Koch |
| Speaker: | Arne Wickenbrock (Universität Mainz ) |
| Abstract: | The past decade has seen enormous effort to strategically develop quantum technologies to benefit society. We realize quantum sensors on different platforms and bring them into a wide-range of applications, from small diamond-based sensors to detect magnetic signatures from cancerous tissue in neurosurgery over vapor cell sensors applied for non-destructive testing to large samples of hyperpolarized nuclear spins measured with super-conducting quantum interference devices to shed light onto some of the most fundamental questions in modern day physics.
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| Date: | Fri, 06.05.2022 |
| Time: | 10:00 |
| Duration: | 45 min |
| Location: | ATI Hörsaal/https://tuwien.zoom.us/j/93672218922?pwd=dEZNQ2liVzRNNURvNmVWVE5KUWRiQT09 |
| Contact: | Philipp Haslinger |
| Weighing the top with energy correlators and soft drop jet mass |
| Speaker: | Aditya Pathak (Univ. Manchester) |
| Abstract: | One of the most important goals of the precision collider physics program is to push beyond the sub-percent accuracy of the current top mass measurement.This involves looking for observables that are both sensitive to the top mass and can be brought under theoretical control. Satisfying both these criterion at the LHC is a challenging task due to contributions from soft physics and the underlying event.In this talk I will present a novel proposal of measuring the top using correlation functions of energy flow operators.The electroweak decay of the top imprints itselfas a distinct peak in the three-point correlation function at an angle determined by the ratio of top mass and transverse momentum.I will show how this can allow us to simultaneously achieve high sensitivity to the top mass comparable to the state-of-the-art measurements.I will contrast this observable with a complementary .. |
| Date: | Fri, 06.05.2022 |
| Time: | 16:15 |
| Duration: | 60 min |
| Location: | Fakultät für Physik, Boltzmanngasse 5, 2. Stock, ERNST MACH Hörsaal Zoom https://univienna.zoom.us/j/93427906843?pwd=YjhSejdUVW16QjVQYUh5TVNSNFNhQT09 Meeting ID: 934 2790 6843 P |
| Contact: | A. Hoang, M. Procura |
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