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Coupling constant corrections in a holographic model of heavy ion collisions with nonzero baryon number density

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  • معلومة اضافية
    • Publisher Information:
      Springer Science and Business Media LLC 2020-05-19T19:56:14Z 2020-05-19T19:56:14Z 2019-12 2020-03-24T17:09:51Z
    • نبذة مختصرة :
      Sufficiently energetic collisions of heavy ions result in the formation of a droplet of a strongly coupled liquid state of QCD matter known as quark-gluon plasma. By using gauge-gravity 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 four-derivative 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 four-derivative 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 inverse-coupling 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 expec- tations, as the coupling is reduced we observe that after the collisions less baryon density ends up stopped at mid-rapidity and more of it ends up moving near the lightcone.
    • الموضوع:
      Article; http://purl.org/eprint/type/JournalArticle
    • Note:
      application/pdf
      English
    • Other Numbers:
      MYG oai:dspace.mit.edu:1721.1/125323
      1029-8479
      Folkestad, Asmund et al. “Coupling constant corrections in a holographic model of heavy ion collisions with nonzero baryon number density.” Journal of High Energy Physics 12 (2019): 093 © 2019 The Author(s)
      1155489704
    • Contributing Source:
      MASSACHUSETTS INST OF TECHNOL LIBRS
      From OAIster®, provided by the OCLC Cooperative.
    • الرقم المعرف:
      edsoai.on1155489704
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