Conveners
Day 4 - Morning: Session 12
- Angela Badala' (Istituto Nazionale di Fisica Nucleare)
Day 4 - Morning: Session 13
- Adam Kisiel (Warsaw University of Technology)
EPOS4 is a (recently released) multipurpose event generator for simulating high energy proton-proton and nucleus-nucleus collisions, which allows to treat within the same formalism very high pt processes and also low-pt phenomena. We will first present the basic ideas, including the question of collectivity in small systems, and then discuss in particular applications concerning resonance production.
Measurements of azimuthal flow and multi-particle correlations in heavy-ion collisions are typically attributed to a collective expansion of the system created in these collisions that is driven by relativistic hydrodynamics. Surprisingly, similar measurements in small collision systems, such as pp and p--Pb collisions, show striking similarities to the corresponding measurements in heavy-ion...
The emergence of collective phenomena in small systems, proton-proton and proton-ion collisions, have over the past decade been a puzzle with many attempts at a solution. On one hand, it is unclear that a Quark-Gluon Plasma would be able to form in such small volumes, and if it can, it would question a lot of what we know about pp phenomenology. On the other hand, a microscopic description...
Studies have yielded strong evidence that a deconfined state of quarks and gluons, the quark--gluon plasma, is created in heavy-ion collisions. This hot and dense matter exhibits almost zero friction and a strong collective behaviour. An unexpected collective behaviour has also been observed in small collision systems. In this talk, the origin of collectivity in small collision systems is...
The two-particle angular correlations in the $\Delta$y$\Delta\varphi$ space provide valuable insights into the properties of hadronization mechanisms and quark-gluon plasma properties. The correlation functions are influenced by several physical sources, including mini-jet correlations, Bose-Einstein quantum statistics, resonance decays, conservation of energy and momentum, and other factors....
A series of laboratory experiments has been reporting anomalies in the internal pair creation emission from the decay of 8Be and 4He nuclei. The excited states have been populated by proton-induced reactions on 7Li and 3H targets at very low energy. Clear deviations from the expected electron-positron angular correlations have been observed and interpreted as the evidence of an unknown 17...
Certain classes of dark matter theory predict the existence of a new, hidden “Dark Sector” of particles which interact with Standard Model particles only through the exchange of a new, massive mediator particle. This is the scenario that the Positron Annihilation into Dark Matter Experiment (PADME) was originally designed to test, using the positron beam at the Beam Test Facility (BTF) at the...
I will discuss novel possibilities for particle holography, allowing for a phase reconstruction from experimental data in elementary particle and nuclear physics. Two examples will beconsidered, one is elastic proton-proton and proton-nucleus scattering, the other is Bose-Einstein or HBT correlations in high energy heavy ion physics.
Dielectrons are unique observables in ultra-relativistic heavy-ion
collisions. Thanks to their penetrating nature, they carry information
from all stages of the collision and can provide knowledge about
pre-equilibirium dynamics, QGP temperature and transport coefficients,
and chiral symmetry restauration. On the other hand, experimental challenges are enormous because production cross...
