Primordial black holes (PBHs), possibly formed via gravitational collapse of large density perturbations in the very early universe, are one of the earliest proposed and viable dark matter (DM) candidates. […]
https://arxiv.org/pdf/2007.00082.pdf https://arxiv.org/pdf/2012.03950.pdf Please note the unusal time!
This is a meeting on topics related to string and field theory, between members of nearby institutions: IP2I (CNRS, UCBL), Lyon LAPTh (CNRS, USMB), Annecy LPENSL (CNRS, ENSL), Lyon More […]
NEWS FROM THE DARK LAPTh, Annecy - November 22-24, 2021 Episode 6 For more information click Here
Participation to the event is by invitation only. If you would like to participate or contribute in some way, please contact serpico _at_ lapth.cnrs.fr. Unless LAPTh administration takes care of your trip, please think of reserving transportation and (above all!) the hotel ASAP, since Annecy is a tourist destination at all times of the year. […]
https://arxiv.org/abs/2106.12582 https://indico.in2p3.fr/event/25013/contributions/101345/
L'organisation du Système Solaire et la description des mouvements qui le caractérisent ont constitué le cœur de l'astronomie pendant de siècles depuis l'antiquité. Cette science appelée Mécanique Céleste qui repose sur la théorie de la gravitation a connu son heure de gloire au XIXe siècle, avant de passer au second plan devant l'essor de l'astrophysique. […]
Abstract: We review recent advances in the calculation of the two-loop Feynman integrals which contribute to five-particle scattering amplitudes with one massive leg. These amplitudes are required to provide theoretical predictions for the three-particle production (two massless and one massive particle) at the next-to-next-to leading-order approximation. We will compare several analytic approaches to the problem […]
As the LHC accumulates data, the need grows for more efficient methods to compute scattering amplitudes. One such method manages to swap the difficult problem of integrating thousands of Feynman diagrams for a much simpler one: solving a system of linear equations. This can be done when there is a known "alphabet" of appropriate singularities […]
We will present a new approach to the problem of quantising integrable systems of differential-difference equations. The main idea is to lift these systems to systems defined on free associative algebras and look for the ideals there that are stabilized by the dynamics of the lifted systems. In a reasonable class of candidate ideals, there […]
Abstract: A new approach to dark matter from the mass-radius diagram of the Universe (arxiv.org) Zoom link: https://cnrs.zoom.us/j/91049381574?pwd=TDZyU3NqT0k4MFk3cUMvc0JuOURCdz09
