2023-03-29
14:16 |
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Quantum Gravity Bounds on 4D EFTs with Minimal Supersymmetry
/ Weigand, Timo (speaker) (Hamburg University)
According to the Swampland idea, quantum gravity effects put severe constraints on effective field theories beyond the usual consistency conditions from quantum field theory such as absence of gauge or gravitational anomalies. In this talk, we propose such constraints for four-dimensional N=1 supergravities based on consistency of certain axionic, or EFT, strings. [...]
2023 - 1:12:18.
TH String Theory Seminar
External link: Event details
In : Quantum Gravity Bounds on 4D EFTs with Minimal Supersymmetry
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2023-03-29
14:15 |
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Observation of tttt production by the CMS Collaboration
/ Skovpen, Kirill (speaker) (Ghent University (BE))
We report the observation of the tttt production in LHC collisions, performed on the data collected by CMS during Run2 (2016-2018). The production of tttt decays is one of the most rare processes at the LHC and among the most complex and rich signatures to study due to the large jet and lepton multiplicity in its final state. [...]
2023 - 1:03:55.
LHC Seminar
External link: Event details
In : Observation of tttt production by the CMS Collaboration
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2023-03-23
08:54 |
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Infinite Distance Limits and Factorization
/ Stout, John (speaker) (Harvard University)
Infinite distance limits in families of quantum theories are observed to enjoy a number of seemingly universal properties: they have "logarithmic" metric singularities, are always associated with weak-coupling limits, and---in quantum gravitational theories---are tied to the appearance of a tower of exponentially light fields. The goal of this talk is to explain why these features are universal. [...]
2023 - 1:13:26.
TH String Theory Seminar
External link: Event details
In : Infinite Distance Limits and Factorization
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2023-03-21
15:41 |
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Measurement of $R(D^*)$ with hadronic $\tau^+$ decays at $\sqrt{s}$ = 13 TeV by the LHCb collaboration
/ Puthumanaillam, Resmi (speaker) (University of Oxford (GB))
The ratios of branching fractions $R(D^{(*)}) = {\cal B}(B^0 \to D^{(*)}\tau \nu_{\tau})/{\cal B}(B^0 \to D^{(*)} \ell \nu_{\ell})$, with $\ell = \mu, e$, allow to test lepton flavour universality in semi-leptonic $b$-decays and have been measured by BaBar, Belle and LHCb collaborations. The measurements have attracted significant attention as the difference between the experimental world-average values of $R(D^*)$ and $R(D)$ and their theoretical prediction is at the level of three standard deviations [...]
2023 - 0:55:32.
LHC Seminar
External link: Event details
In : Measurement of $R(D^*)$ with hadronic $\tau^+$ decays at $\sqrt{s}$ = 13 TeV by the LHCb collaboration
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2023-03-21
11:29 |
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Neuromorphic Event-based Vision: Technology and Applications
/ Posch, Christoph (speaker) (Co-Founder and CTO at PROPHESEE)
Neuromorphic event-based vision is an emerging paradigm of acquisition and processing of visual information that takes inspiration from the functioning of the human vision system, attempting to recreate Nature's visual information acquisition and processing on VLSI silicon. In contrast to conventional image sensors, event vision sensors do not use a common sampling rate (=frame rate) for all pixels, but each individual pixel autonomously defines the timing of its own sampling points in response to its visual input by reacting to changes of incident light in continuous time. [...]
2023 - 1:14:57.
Detector Seminar
External link: Event details
In : Neuromorphic Event-based Vision: Technology and Applications
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2023-03-15
17:26 |
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2023-03-15
11:49 |
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2023-03-15
11:38 |
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2023-03-15
09:36 |
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The Black Hole Photon Ring
/ Lupsasca, Alex (speaker) (Vanderbilt)
What does a black hole look like? The first images of the supermassive black hole M87* display a bright ring encircling the event horizon, which appears as a dark patch in its surrounding emission. But Einstein's theory of general relativity predicts that within this image there also lies a thin "photon ring" consisting of multiple mirror images of the main emission. [...]
2023 - 1:19:19.
TH String Theory Seminar
External link: Event details
In : The Black Hole Photon Ring
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2023-03-10
13:39 |
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An introduction to Bayesian neural networks and uncertainty quantification in neural networks
/ Talpini, Jacopo (speaker) (Università degli Studi di Milano-Bicocca)
Over the past few years, many advances in the field of Deep Learning (DL) have been achieved and nowadays modern DL models are starting to be deployed in our everyday life. However, for many safety-critical applications, as long as scientific research fields, the quantification of the uncertainty of DL model predictions plays a crucial role.
In this lecture, I will introduce the basics of Bayesian Neural Networks, how they can tackle the problem of estimating model uncertainty, and the most common techniques for generalizing this method to deep neural networks..
2023 - 0:47:16.
Inverted CSC; Inverted CERN School of Computing 2023
External links: Talk details; Event details
In : Inverted CERN School of Computing 2023
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