Conveners
Session 7
- Ilídio Lopes (CENTRA, IST, UL)
I will review the main theoretical aspects of the standard cosmological model, commonly known as the "Big Bang theory”, its observational achievements and finally its main open problems, describing some of the leading solutions that have been proposed in the literature.
Bondi-like (single-null) characteristic formulations of general relativity are used for numerical work in both asymptotically flat and anti-de Sitter spacetimes. Well-posedness of the resulting systems of partial differential equations, however, remains an open question. The answer to this question affects the accuracy and reliability of conclusions drawn from numerical studies based on such...
In spherical symmetry compelling numerical evidence suggests that in general relativity solutions
near the threshold of black hole formation exhibit critical behavior. One aspect of this is that
threshold solutions themselves are self-similar and are, in a certain sense, unique. To an extent
yet to be fully understood, the same phenomena persist beyond spherical symmetry. It is...
A search for vector-like quarks is presented, which targets their decay into a Z boson and a third-generation Standard Model quark. In the case of a vector-like quark T (B) with charge +2/3e (−1/3e), the decay targeted is T → Zt (B → Zb). A dataset corresponding to 139/fb of pp collisions at √s = 13 TeV, collected between 2015 and 2018 with the ATLAS detector during Run 2 with the Large Hadron...
