skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Observable consequences of event-by-event fluctuations of HBT radii

Abstract

We explore the effects of event-by-event fluctuations of Hanbury Brown–Twiss (HBT) radii and show how they can be observed experimentally. The relation of measured HBT radii extracted from ensemble-averaged correlation functions to the mean of their event-by-event probability distribution is clarified. Here, we propose a method to experimentally determine the mean and variance of this distribution and test it on an ensemble of fluctuating events generated with the viscous hydrodynamic code VISH2+1. Using the same code, the sensitivity of the mean and variance of the HBT radii to the specific QGP shear viscosity $$\eta$$/s is studied. We report sensitivity of the mean pion HBT radii and their variances to the temperature dependence of \eta/s near the quark-hadron transition at a level similar (10-20%) to that which was previously observed for elliptic and quadrangular flow of charged hadrons.

Authors:
 [1]; ORCiD logo [1]
  1. The Ohio State Univ., Columbus, OH (United States)
Publication Date:
Research Org.:
The Ohio State Univ., Columbus, OH (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)
OSTI Identifier:
1604415
Grant/Contract Number:  
SC0004286
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Nuclear Physics. A
Additional Journal Information:
Journal Volume: 956; Journal Issue: C; Journal ID: ISSN 0375-9474
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS

Citation Formats

Plumberg, Christopher, and Heinz, Ulrich. Observable consequences of event-by-event fluctuations of HBT radii. United States: N. p., 2016. Web. doi:10.1016/j.nuclphysa.2016.01.009.
Plumberg, Christopher, & Heinz, Ulrich. Observable consequences of event-by-event fluctuations of HBT radii. United States. doi:10.1016/j.nuclphysa.2016.01.009.
Plumberg, Christopher, and Heinz, Ulrich. Wed . "Observable consequences of event-by-event fluctuations of HBT radii". United States. doi:10.1016/j.nuclphysa.2016.01.009. https://www.osti.gov/servlets/purl/1604415.
@article{osti_1604415,
title = {Observable consequences of event-by-event fluctuations of HBT radii},
author = {Plumberg, Christopher and Heinz, Ulrich},
abstractNote = {We explore the effects of event-by-event fluctuations of Hanbury Brown–Twiss (HBT) radii and show how they can be observed experimentally. The relation of measured HBT radii extracted from ensemble-averaged correlation functions to the mean of their event-by-event probability distribution is clarified. Here, we propose a method to experimentally determine the mean and variance of this distribution and test it on an ensemble of fluctuating events generated with the viscous hydrodynamic code VISH2+1. Using the same code, the sensitivity of the mean and variance of the HBT radii to the specific QGP shear viscosity $\eta$/s is studied. We report sensitivity of the mean pion HBT radii and their variances to the temperature dependence of \eta/s near the quark-hadron transition at a level similar (10-20%) to that which was previously observed for elliptic and quadrangular flow of charged hadrons.},
doi = {10.1016/j.nuclphysa.2016.01.009},
journal = {Nuclear Physics. A},
issn = {0375-9474},
number = C,
volume = 956,
place = {United States},
year = {2016},
month = {10}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record

Save / Share: