Longitudinal coherence in a holographic model of asymmetric collisions.

Phys Rev Lett

Institute for Theoretical Physics and Institute for Subatomic Physics, Utrecht University, Leuvenlaan 4, 3584 CE Utrecht, The Netherlands.

Published: June 2014

AI Article Synopsis

  • The study simulates how gravitational shock waves in anti-de Sitter space behave during heavy ion collisions, focusing on interactions of multiple constituents.
  • It concludes that if the separation between these constituents is less than or equal to 0.26 divided by the hydrodynamic temperature (T_hyd), they act as a single unit and do not affect the resulting plasma independently.
  • The findings suggest that the overall center-of-mass of the plasma aligns with the total center-of-mass of all constituents involved in the collision, which has implications for understanding both nucleus-nucleus and proton-nucleus collisions.

Article Abstract

As a model of the longitudinal structure in heavy ion collisions, we simulate gravitational shock wave collisions in anti-de Sitter space in which each shock is composed of multiple constituents. We find that all constituents act coherently, and their separation leaves no imprint on the resulting plasma, when this separation is ≲0.26/T_{hyd}, with T_{hyd} the temperature of the plasma at the time when hydrodynamics first becomes applicable. In particular, the center-of-mass of the plasma coincides with the center-of-mass of all the constituents participating in the collision, as opposed to the center-of-mass of the individual collisions. We discuss the implications for nucleus-nucleus and proton-nucleus collisions.

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Source
http://dx.doi.org/10.1103/PhysRevLett.112.221602DOI Listing

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