Correlations and Flow in Ultra-Relativistic Pb-Pb and pp collisions at the LHC

Dragos Velicanu, Massachusetts Institute of Technology

This poster will discuss the collective behavior of the hottest and densest matter in the universe created in proton-proton and lead-lead collisions at the LHC at 7 TeV and 2.76 TeV center-of-mass energies with the CMS detector. At 30 times the density of a neutron star and a million times hotter than the center of the sun, this matter is capable of melting protons and neutrons into a hot soup of deconfined quarks and gluons exhibiting long-range correlations and possible hydrodynamic flow. I will focus on the peculiar features of these systems as seen through the eyes of two-particle correlations and the comparisons we can draw between them. These correlations are drawn from a pool of around 100 billion collisions that must be selected in real time and become datasets ranging in the tens-to-hundreds of terabytes, stored and analyzed on thousands of distributed nodes.

Abstract Author(s): Dragos Velicanu