Coupling constant corrections in a holographic model of heavy ion collisions with nonzero baryon number density
Abstract
Sufficiently energetic collisions of heavy ions result in the formation of a droplet of a strongly coupled liquid state of QCD matter known as quarkgluon plasma. By using gaugegravity duality (holography), a model of a rapidly hydrodynamizing and thermal izing process like this can be constructed by colliding sheets of energy density moving at the speed of light and tracking the subsequent evolution. In this work, we consider the dual gravitational description of such collisions in the most general bulk theory with a fourderivative gravitational action containing a dynamical metric and a gauge field in five dimensions. Introducing the bulk gauge field enables the analysis of collisions of sheets which carry nonzero “baryon” number density in addition to energy density. Introducing the fourderivative terms enables consideration of such collisions in a gauge theory with finite gauge coupling, working perturbatively in the inverse coupling. While the dynamics of energy and momentum in the presence of perturbative inversecoupling corrections has been analyzed previously, here we are able to determine the effect of such finite coupling corrections on the dynamics of the density of a conserved global charge, which we take as a model for the dynamics of nonzero baryon number density. Inmore »
 Authors:

 Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
 Utrecht Univ. (The Netherlands)
 Publication Date:
 Research Org.:
 Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
 Sponsoring Org.:
 USDOE Office of Science (SC), Nuclear Physics (NP)
 OSTI Identifier:
 1637348
 Grant/Contract Number:
 SC0011090
 Resource Type:
 Accepted Manuscript
 Journal Name:
 Journal of High Energy Physics (Online)
 Additional Journal Information:
 Journal Name: Journal of High Energy Physics (Online); Journal Volume: 2019; Journal Issue: 12; Journal ID: ISSN 10298479
 Publisher:
 Springer Berlin
 Country of Publication:
 United States
 Language:
 English
 Subject:
 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; AdSCFT correspondence; gaugegravity correspondence; holography and quarkgluon plasmas; quarkgluon plasma
Citation Formats
Folkestad, Asmund, Grozdanov, Sašo, Rajagopal, Krishna, and van der Schee, Wilke. Coupling constant corrections in a holographic model of heavy ion collisions with nonzero baryon number density. United States: N. p., 2019.
Web. https://doi.org/10.1007/JHEP12(2019)093.
Folkestad, Asmund, Grozdanov, Sašo, Rajagopal, Krishna, & van der Schee, Wilke. Coupling constant corrections in a holographic model of heavy ion collisions with nonzero baryon number density. United States. https://doi.org/10.1007/JHEP12(2019)093
Folkestad, Asmund, Grozdanov, Sašo, Rajagopal, Krishna, and van der Schee, Wilke. Wed .
"Coupling constant corrections in a holographic model of heavy ion collisions with nonzero baryon number density". United States. https://doi.org/10.1007/JHEP12(2019)093. https://www.osti.gov/servlets/purl/1637348.
@article{osti_1637348,
title = {Coupling constant corrections in a holographic model of heavy ion collisions with nonzero baryon number density},
author = {Folkestad, Asmund and Grozdanov, Sašo and Rajagopal, Krishna and van der Schee, Wilke},
abstractNote = {Sufficiently energetic collisions of heavy ions result in the formation of a droplet of a strongly coupled liquid state of QCD matter known as quarkgluon plasma. By using gaugegravity duality (holography), a model of a rapidly hydrodynamizing and thermal izing process like this can be constructed by colliding sheets of energy density moving at the speed of light and tracking the subsequent evolution. In this work, we consider the dual gravitational description of such collisions in the most general bulk theory with a fourderivative gravitational action containing a dynamical metric and a gauge field in five dimensions. Introducing the bulk gauge field enables the analysis of collisions of sheets which carry nonzero “baryon” number density in addition to energy density. Introducing the fourderivative terms enables consideration of such collisions in a gauge theory with finite gauge coupling, working perturbatively in the inverse coupling. While the dynamics of energy and momentum in the presence of perturbative inversecoupling corrections has been analyzed previously, here we are able to determine the effect of such finite coupling corrections on the dynamics of the density of a conserved global charge, which we take as a model for the dynamics of nonzero baryon number density. In accordance with expectations, as the coupling is reduced we observe that after the collisions less baryon density ends up stopped at midrapidity and more of it ends up moving near the lightcone.},
doi = {10.1007/JHEP12(2019)093},
journal = {Journal of High Energy Physics (Online)},
number = 12,
volume = 2019,
place = {United States},
year = {2019},
month = {12}
}
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