High Energy Particle Physics and Relativistic Hydrodynamics

A special issue of Symmetry (ISSN 2073-8994). This special issue belongs to the section "Physics".

Deadline for manuscript submissions: closed (31 July 2021) | Viewed by 4426

Special Issue Editor


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Guest Editor
Faculty of Physics, Warsaw University of Technology, 75, Koszykowa str., 00-662 Warsaw, Poland
Interests: high energy physics; particle physics; heavy ion physics; modeling of nuclear processes; computer simulation methods; MC simulations; information sciences

Special Issue Information

Dear Colleagues,

There is no doubt that symmetries play a fundamental role in high energy physics and their relativistic phenomena. Researchers strive to develop elegant models to describe the world of elementary particles and make theoretical predictions introducing symmetry. An example of such efforts is the supersymmetric standard model, which introduces a supersymmetric partner for each particle and is part of the research relating to the grand unified theory. By exploring the particular areas of the phase diagram of strongly interacting matter, chiral symmetry restoration can be expected. In the case of quasi-free quarks (transition to quark–gluon plasma), (partial) restoration of chiral symmetry is expected. Moreover, in dense nuclear matter, the properties of the various hadronic resonances can change as a consequence of the recovery of chiral symmetry. When describing nuclear matter using relativistic hydrodynamics, cylindrical, ellipsoidal, spheroidal, or Gaussian symmetries are used to describe the initial state of quark matter in collisions of heavy ions at relativistic energies.

In this Special Issue of Symmetry, we will focus on all aspect of symmetries, including the reasons and consequences for the prevalent use of symmetry and restoration or for breaking symmetry. This Special Issue will cover many topics, such as high energy physics, particle physics, strong interactions, QCD, QED, the standard model and beyond, particle interactions, the physics of heavy ions, resonance productions, and relativistic hydrodynamics. Investigations of relativistic hydrodynamics in the scientific fields mentioned above are also welcome.

Dr. Marcin Słodkowski
Guest Editor

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Keywords

  • symmetry
  • particle properties
  • symmetry theory
  • strong interaction
  • chiral symmetry
  • heavy ion physics
  • resonance productions
  • relativistic hydrodynamics

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Published Papers (2 papers)

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Research

15 pages, 693 KiB  
Article
Modeling the Dynamics of Heavy-Ion Collisions with a Hydrodynamic Model Using a Graphics Processor
by Marcin Słodkowski, Dominik Setniewski, Paweł Aszklar and Joanna Porter-Sobieraj
Symmetry 2021, 13(3), 507; https://doi.org/10.3390/sym13030507 - 20 Mar 2021
Cited by 2 | Viewed by 2268
Abstract
Dense bulk matter is formed during heavy-ion collision and expands towards a vacuum. It behaves as a perfect fluid, described by relativistic hydrodynamics. In order to study initial condition fluctuation and properties of jet propagation in dense hot matter, we assume a Cartesian [...] Read more.
Dense bulk matter is formed during heavy-ion collision and expands towards a vacuum. It behaves as a perfect fluid, described by relativistic hydrodynamics. In order to study initial condition fluctuation and properties of jet propagation in dense hot matter, we assume a Cartesian laboratory frame with several million cells in a stencil with high-accuracy data volume grids. Employing numerical algorithms to solve hydrodynamic equations in such an assumption requires a lot of computing power. Hydrodynamic simulations of nucleus + nucleus interactions in the range of energies of the Large Hadron Collider (LHC) are carried out using our program, which uses Graphics Processing Units (GPUs) and Compute Unified Device Architecture (CUDA). In this work, we focused on transforming hydrodynamic quantities into kinetic descriptions. We implemented the hypersurface freeze-out conditions using marching cubes techniques. We developed freeze-out procedures to obtain the momentum distributions of particles on the hypersurface. The final particle distributions, elliptic flow, and higher harmonics are comparable to the experimental LHC data. Full article
(This article belongs to the Special Issue High Energy Particle Physics and Relativistic Hydrodynamics)
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7 pages, 325 KiB  
Article
Similarities in Multiparticle Production Processes in pp Collisions as Imprints of Nonextensive Statistics
by Maciej Rybczynski and Zbigniew Wlodarczyk
Symmetry 2020, 12(8), 1339; https://doi.org/10.3390/sym12081339 - 10 Aug 2020
Cited by 2 | Viewed by 1605
Abstract
The transverse momentum pT spectra of both hadrons and jets produced in pp collisions at beam energies from hundreds GeV to a few TeV exhibit power-law behavior of 1/pTn at high pT, with similar power [...] Read more.
The transverse momentum pT spectra of both hadrons and jets produced in pp collisions at beam energies from hundreds GeV to a few TeV exhibit power-law behavior of 1/pTn at high pT, with similar power indices n. The respective nonextensivity parameters for transverse momenta distributions and the global nonextensivity parameter obtained from multiplicities are compared. In particular, data on kaon to pion (charged particles) multiplicity ratio are analyzed, assuming that the reaction occurs in some nonextensive environment. The values of the corresponding nonextensivity parameters were found to be similar, strongly indicating the existence of a common mechanism behind all these observables. Full article
(This article belongs to the Special Issue High Energy Particle Physics and Relativistic Hydrodynamics)
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