20241108 09:23 

On adiabatic renormalization with an infrared cutoff
/ Conzinu, Pietro (speaker)
We describe a new approach to renormalize physical quantities in curved spacetime introducing a comoving infrared cutoff in defining the adiabatic counterpart of the physical quantity under consideration. This infrared cutoff is fundamental to avoid unphysical divergences that can be generated by a pathological behavior of the adiabatic subtraction extended to the infrared domain. [...]
2024  Streaming video.
TH institutes; Looping in the Primordial Universe
External links: Talk details; Event details
In : Looping in the Primordial Universe

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20241108 09:21 
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20241107 09:13 

CoarseGrained Holography: Chaos, Eigenstate Thermalization, and 3D Gravity
/ Liška, Diego (speaker) (EPFL/U. Geneva)
In recent years, it has become clear that the path integral of semiclassical 3D gravity offers a "coarsegrained" description of its holographic 2D CFT. This relationship is particularly transparent when considering the statistical moments of operator product expansion (OPE) coefficients in the CFT. [...]
2024  3252.
TH String Theory Seminar
External link: Event details
In : CoarseGrained Holography: Chaos, Eigenstate Thermalization, and 3D Gravity

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20241106 14:11 

Timing RPCs: 25 years
/ Fonte, Paulo (speaker) (Department of Radiation Oncology, Yonsei Cancer Center, Heavy Ion Therapy Research Institute, Yonsei University College of Medicine, Seoul, Republic of Korea Coimbra Institute of Engineering, Polytechnic University of Coimbra, Portugal LIP  Laboratory of Instrumentation and Experimental Particle Physics, Coimbra, Portugal)
About 25 years ago, in the framework of the ALICE TOF R&D effort, the time resolution of the RPC detector technology was extended to sub100 ps by decreasing the gap width by about one order of magnitude and adopting the multigap construction method. This resolution range is interesting for particle tagging or identification by timeofflight and opened the way to practical very large timeofflight detectors for HEP and nuclear physics.
The 1999/09/27 an EP Detector Seminar was given on this matter, covering the main results and the first explorations in the physics of this detector.
In the present seminar we will revisit the preceding related detectors and the discovery process, summarize the applications that have meanwhile emerged and the status of the theoretical understanding of these detectors..
2024  3838.
Detector Seminar
External link: Event details
In : Timing RPCs: 25 years

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20241105 13:54 

Renormalization of the primordial inflationary power spectra
/ Pla Garcia, Silvia (speaker) (King's College London)
In this talk, I will explore the effects of renormalization on the amplitude of the inflationary spectra at scales measurable in the cosmic microwave background.
Via a gaugeinvariant analysis, I will explain why the standard prediction for the spectra on superhorizon scales is a latetime attractor while they are UV finite at all times. [...]
2024  4041.
TH institutes; Looping in the Primordial Universe
External links: Talk details; Event details
In : Looping in the Primordial Universe

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20241105 13:18 

The Born regime of gravitational amplitudes
/ Isabella, Giulia (speaker) (UCLA)
I will discuss 2 > 2 scattering in the regime where the wavelength of the scattered objects is comparable to the impact parameter but much larger than any Compton wavelength in the QFT. In this regime  which differs from the eikonal  the Feynman diagram expansion organizes itself naturally in terms of a geometric (or Born) series that iterates an effective “quantum mechanical” potential [...]
2024  4387.
TH String Theory Seminar
External link: Event details
In : The Born regime of gravitational amplitudes

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20241105 13:18 

Physics of and from the largescale structure of the Universe
/ Lewandowski, Matthew (speaker)
It is expected that measurements of the largescale structure of the Universe will soon become our leading sources of fundamental cosmological information. In this talk, I will review some of the major progress, both theoretical and dataoriented, that we have made in understanding the physics of galaxy clustering, as well as what we might hope to learn about new physics (including primordial nonGaussianities) from these measurements. [...]
2024  4457.
TH institutes; Looping in the Primordial Universe
External links: Talk details; Event details
In : Looping in the Primordial Universe

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20241105 11:54 

Stochastic inflation: key insights, latest advances and future directions
/ Animali, Chiara (speaker)
During inflation, quantum vacuum fluctuations are stretched beyond the Hubble radius, modifying the largescale dynamics of the universe. Although typically negligible in the perturbative regime, this backreaction can become significant in regimes leading to primordial black hole (PBH) formation, where large density fluctuations arise, and which are the standard framework for addressing loop corrections. [...]
2024  2974.
TH institutes; Looping in the Primordial Universe
External links: Talk details; Event details
In : Looping in the Primordial Universe

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20241105 11:53 
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20241105 11:53 
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