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CERN Document Server 53 elementer funnet  1 - 10nesteslutt  gå til element: Søket tok 0.66 sekunder. 
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No EFT for massive higher spins / Riva, Francesco (speaker)
Massive resonances with spin larger or equal 2 are ubiquitous in physics, but their mass is always larger than their inverse size (the EFT cutoff). I will show that this condition follows from the requirement that the underlying theory be unitary and causal..
2023 - 2029. Conferences, Workshops & Schools; QCD Meets Gravity 2023 External links: Talk details; Event details In : QCD Meets Gravity 2023
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Microscopic Bounds on Macroscopic Theories / Riva, Francesco (speaker)
I will discuss Effective Field Theories that can originate from microscopic unitary theories, and their relation to moment theory. I will discuss the implications for pion physics, as well as showing that massive gravity, theories with isolated massive higher-spin particles, and theories with very irrelevant interactions, don’t posses healthy UV completions..
2023 - 4128. Theory Colloquia External link: Event details In : Microscopic Bounds on Macroscopic Theories
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Explaining Nonlinearities in Black Hole Ringdowns from Symmetries / Kehagias, Alex (Natl. Tech. U., Athens ; CERN) ; Perrone, Davide (Geneva U.) ; Riotto, Antonio (Geneva U.) ; Riva, Francesco (Geneva U.)
It has been recently pointed out that nonlinear effects are necessary to model the ringdown stage of the gravitational waveform produced by the merger of two black holes giving rise to a remnant Kerr black hole. We show that this nonlinear behaviour is explained, both on the qualitative and quantitative level, by near-horizon symmetries of the Kerr black hole within the Kerr/CFT correspondence..
arXiv:2301.09345.- 2023-07-10 - 5 p. - Published in : Phys. Rev. D 108 (2023) L021501 Fulltext: PDF;
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Promising Technologies and R&D Directions for the Future Muon Collider Detectors / Muon Collider Collaboration
Among the post-LHC generation of particle accelerators, the muon collider represents a unique machine with capability to provide very high energy leptonic collisions and to open the path to a vast and mostly unexplored physics programme. [...]
arXiv:2203.07224. - 31.
Fermilab Library Server - eConf - Fulltext - Fulltext
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Cornering Large-$N_c$ QCD with Positivity Bounds / Fernandez, Clara (Barcelona, IFAE ; BIST, Barcelona) ; Pomarol, Alex (Barcelona, IFAE ; BIST, Barcelona ; Barcelona, Autonoma U. ; CERN) ; Riva, Francesco (Geneva U., Dept. Theor. Phys.) ; Sciotti, Francesco (Barcelona, IFAE ; BIST, Barcelona)
The simple analytic structure of meson scattering amplitudes in the large-$N_c$ limit, combined with positivity of the spectral density, provides precise predictions on low-energy observables. Building upon previous studies, we explore the allowed regions of chiral Lagrangian parameters and meson couplings to pions. [...]
arXiv:2211.12488.- 2023-06-16 - 39 p. - Published in : JHEP 2306 (2023) 094 Fulltext: 2211.12488 - PDF; document - PDF;
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A Muon Collider Facility for Physics Discovery / Muon Collider Collaboration
Muon colliders provide a unique route to deliver high energy collisions that enable discovery searches and precision measurements to extend our understanding of the fundamental laws of physics. [...]
arXiv:2203.08033. - 23.
Fermilab Library Server - eConf - Fulltext - Fulltext
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Simulated Detector Performance at the Muon Collider / Muon Collider Collaboration
In this paper we report on the current status of studies on the expected performance for a detector designed to operate in a muon collider environment. [...]
arXiv:2203.07964 ; FERMILAB-FN-1185-AD-ND-PPD-TD. - 45.
Fermilab Library Server - eConf - Fulltext - Fulltext
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8.
IR side of positivity bounds / Bellazzini, Brando (IPhT, Saclay ; EPFL, Lausanne, LPTP ; CERN) ; Riembau, Marc (EPFL, Lausanne, LPTP) ; Riva, Francesco (Geneva U., Dept. Theor. Phys.)
We show how calculable IR loop effects impact positivity bounds in Effective Field Theories with causal and unitary UV completions. We identify infrared singularities which appear in dispersion relations at $|t|\lesssim m^2$. [...]
arXiv:2112.12561.- 2022-11-10 - 11 p. - Published in : Phys. Rev. D 106 (2022) 105008 Fulltext: 2112.12561 - PDF; Publication - PDF;
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Truncation, validity, uncertainties / Brivio, Ilaria (Heidelberg U. ; Zurich U.) ; Dawson, Sally (Brookhaven) ; de Blas, Jorge (CAFPE, Granada ; Granada U., Theor. Phys. Astrophys. ; CERN) ; Durieux, Gauthier (CERN) ; Petrucciani, Giovanni (CERN) ; Savard, Pierre (Toronto U.) ; Berger, Nicolas (Annecy, LAPP) ; Contino, Roberto (Rome U.) ; Degrande, Céline (Louvain U., CP3) ; Falkowski, Adam (IJCLab, Orsay) et al.
The truncation of the standard-model effective field theory, its validity and the associated uncertainties have been discussed in meetings of the LHC EFT WG. Proposals were made by participants to address these issues. [...]
CERN-LHCEFTWG-2021-002; CERN-LPCC-2022-01; arXiv:2201.04974.- 21 - 8 p. Fulltext: PDF; v2 draft: PDF;
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Positive Moments and Loops / Riva, Francesco (speaker)
2021 - 3470. Conferences & Workshops; Positivity and the Bootstrap External links: Talk details; Event details In : Positivity and the Bootstrap
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19 Riva, F
61 Riva, Francesco
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