Jetography in Heavy Ion Collisions

Thu, 24 Sep 2026 09:28:30 +0000

Sexta-feira, 25 de Setembro 2026 das 10:00 às 12:00

Anfiteatro PA-3 (Piso -1 do Pavilhão de Matemática) do IST

During the last decades, heavy ion collisions have become an increasingly active area of research. This system provides a unique laboratory to study partonic matter (quarks and gluons, the nucleon constituents described by Quantum Chromodynamics) at temperatures and densities much higher than those inside a nucleus. Under such extreme conditions partons reach deconfinement, forming a new phase of matter known as the quark-gluon plasma. This dense nuclear medium has become an important object of study due to exhibiting collective behaviour, and because it is thought to have filled the universe in the instants after the Big Bang.

Owing to its high temperature the quark-gluon plasma is very short-lived, making it impossible to observe directly. It can instead be studied indirectly through the high energy particles produced during the collision, typically observed as narrow jets. As these jets develop, the medium’s evolution becomes imprinted in their kinematic information. By comparing heavy-ion …

Enhancing Multi-Messenger Observations at the Pierre Auger Observatory and the Southern Wide-field Gamma-ray Observatory

Thu, 24 Sep 2026 09:52:30 +0000

Quinta-feira, 8 de Outubro 2026 das 14:00 às 16:00

Anfiteatro PA-3 (Piso -1 do Pavilhão de Matemática) do IST

Multi-messenger astrophysics has become a crucial field in understanding the Universe, with joint observations of high-energy photons and neutrinos from astrophysical sources having demonstrated the potential to uncover the mechanisms behind the most extreme cosmic accelerators. One of the longest-standing questions in astrophysics, the origin of ultra-high-energy (UHE) cosmic rays, requires observatories capable of detecting gamma rays and neutrinos over a broad energy range, with sufficient sensitivity and sky coverage to capture persistent and transient sources.

The Southern Wide-field Gamma-ray Observatory (SWGO) and the Pierre Auger Observatory are ground-based extensive air shower (EAS) arrays uniquely positioned to address these questions. Together, they span an energy range from a few hundred GeV to several EeV, surveying a region of the sky containing the Galactic Center and the bulk of the known PeVatron population.

Realising their full multi-messenger potential requires novel detection and analysis techniques to push the sensitivity of these observatories …

Eventos

Jetography in Heavy Ion Collisions

Enhancing Multi-Messenger Observations at the Pierre Auger Observatory and the Southern Wide-field Gamma-ray Observatory