University of Minnesota
School of Physics & Astronomy

Nuclear Physics Seminar

Friday, October 7th 2016
10:10 am:
Speaker: Christopher Plumberg, University of Minnesota
Subject: Event-by-event fluctuations and their consequence for Hanbury Brown-Twiss interferometry

The relativistic heavy-ion program is dedicated to systematically probing the properties of the atomic nucleus and the theory of quantum chromodynamics at extremely high temperatures and energy densities. Numerous observables have been developed and studied over the past several decades, allowing one to extract valuable information about heavy-ion collisions and their evolution, including total multiplicity, anisotropic flows, mean pT, interferometric radii, and so on. Many of these observables have been studied on an event-by-event basis, allowing them, along with their event-by-event probability distributions, to be used for constraining the role of event-by-event fluctuations in the evolution of heavy-ion collisions.
In this talk, I will discuss the possibility of treating the Hanbury Brown-Twiss radii as event-by-event observables, and consider the ways in which their event-by-event probability distributions might be related to interesting theoretical quantities, such as transport coefficients in the quark-gluon plasma, or used to constrain viable models of the initial state in heavy-ion collisions. I will also briefly discuss some recent efforts to extend these results to explore the effects of hydrodynamic fluctuations in heavy-ion collisions.

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