Subatomic Swirls: Ultra-relativistic Nuclear Collisions and Nature’s Most Vortical Fluid

Data de Início: 
quinta-feira, 19 Março, 2020 - 16:00
Palestrante: 
Prof. Dr. Mike Lisa - Ohio Statte University
Local: 
Auditório Abrahão de Moraes - IFUSP

Abstract:
Ultra-relativistic collisions between heavy nuclei produce the quark-gluon plasma (QGP), a unique state of matter that characterized the early universe for the first few microseconds after the Big Bang. Among the most surprising early results from the Relativistic Heavy Ion Collider (RHIC) was the discovery that the QGP is a fluid with remarkable properties, and a hydrodynamic treatment is now the standard paradigm in probing the bulk properties of nuclear collisions. Recently, the STAR Collaboration at RHIC announced the discovery of global hyperon polarization in heavy ion collisions. This polarization may be used to extract the rotational substructure of the fluid flow field. The result represents a striking validation of the near-equilibrium hydrodynamic paradigm and establishes the quark-gluon plasma at RHIC as by far the most vortical fluid in Nature. I will discuss some of the intense activity in the field, sparked by the discovery of QGP vorticity. In addition to the rotational fluid substructure, these measurements are sensitive to the extreme magnetic fields expected in heavy ion collisions. A quantitative understanding of these fields is one of the most important issues in the field of heavy ion physics today. 

Brief Resume:
M.A. SUNY Stony Brook - Johanna Stachel, advisor - 1990
Ph.D. Michigan State University - Konrad Gelbke, advisor - 1993
Postdoc at Lawrence Berkeley National Lab 1993-96
Ohio State Faculty member 1996-present.  (Full professor since 2005.)
Fellow of American Physical Society
Fulbright Scholar

Palavras-chaves: quark-gluon plasma, hydrodynamics, heavy ion collisions

 

Tranmissão via IPTV: