UFRGS-HEP Journal Club
Friday 3 March 2023 -
10:30
Monday 27 February 2023
Tuesday 28 February 2023
Wednesday 1 March 2023
Thursday 2 March 2023
Friday 3 March 2023
10:30
Gustavo Bopsin
Gustavo Bopsin
10:30 - 11:30
Perfect QCD -- a new Universal approach to soft QCD Peter Christiansen Suplemento de la Revista Mexicana de Física, 3 (2022) Hide abstract | Show figures | Show BibTeX | Show discussion | View PDF | 2301.13467v1 The ideas presented in this proceeding aims to be a first step towards a description of hadronic collisions where all soft processes are fundamentally strongly coupled and the same Universal strongly coupled physics drives both initial and final-state interactions. As it is not currently possible to derive such a picture from first principles, instead, an attempt to generalize the perfect liquid observation to a ``perfect QCD'' guiding principle is presented, focusing on implications for particle production in small systems. The first steps towards a microscopic model is taken by arguing that ``perfect QCD'' suggests that the screening in the initial state is so large that multi-parton interactions are of little or no importance. Instead, a target and projectile remnant is coherently excited and particle production is mainly driven by radiation in a qualitative similar manner as e+e−→qq¯ . Finally, some of the possible implications of this ``excited remnant model'' are presented. It is argued that the time ordering of soft and hard physics can explain the absence of jet quenching in small systems and that the coherence scale of the projectile and target provides insights into what small systems will exhibit flow. Authors' comments: 6 pages, 2 figures. Proceeding for WWND 2022