Advances of Asymmetry/Symmetry in High Energy Physics

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

Deadline for manuscript submissions: 30 November 2025 | Viewed by 383

Special Issue Editors


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Guest Editor
Adjunct Professor, Campus Iturama, Universidade Federal do Triângulo Mineiro, Iturama 38280-000, MG, Brazil
Interests: regularization; renormalization; quantum corrections and quantum field theories with violation of Lorentz symmetry

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Guest Editor
Associate Professor, Departamento de Física, Universidade Federal da Paraíba, João Pessoa 58051-970, Brazil
Interests: supersymmetry; superfields; noncommutativity; Lorentz symmetry breaking; effective action and renormalization
Special Issues, Collections and Topics in MDPI journals

E-Mail Website
Guest Editor
Associate Professor, Departamento de Física, Universidade Federal da Paraíba, João Pessoa 58051-970, Brazil
Interests: breaking Lorentz symmetry in modified theories of gravity: classical and quantum aspects; hidden symmetries near the horizon of extended objects from supergravity classical aspects of non-local gravitational field theories

Special Issue Information

Dear Colleagues,

Symmetries in Physics are one of the main aspects of the construction of field theories. The very definition of an elementary particle is related to the concept of symmetry, supersymmetric theories are built based on the Poincaré group, and the form of particle interactions is determined by symmetries. 

As important as symmetries are the violations of them. The asymmetry between matter and antimatter in the universe is still an unsolved mystery. Also, although theories possess symmetries at classical levels and are built according to them, quantum corrections can break them. The quantum breaking of a classical symmetry is called an anomaly, and it is related to observable processes. From a physical point of view, it is mandatory to find out if the anomaly is indeed real or spurious. Furthermore, it is interesting from an experimental point of view to check how good the symmetries that we take for granted are. For instance, the Standard Model Extension is a symmetry breaking framework that makes it possible to test how good Lorentz and CPT symmetries are by means of several precise experiments.

This Special Issue cover several aspects of asymmetries/symmetries in particle physics, including supersymmetry, anomalies in quantum field theory, Lorentz and CPT violation, spontaneous symmetry breaking, and baryogenesis, among others.

Dr. Alexandre Rodrigues Vieira
Prof. Dr. Albert Petrov
Prof. Dr. Paulo José Ferreira Porfírio da Silva
Guest Editors

Manuscript Submission Information

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Keywords

  • anomalies in QFT
  • supersymmetry
  • baryogenesis
  • spontaneous and explicit symmetry breaking
  • Lorentz and CPT violation
  • space-time symmetries
  • renormalization and symmetries
  • standard model extension

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Published Papers (1 paper)

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Research

10 pages, 560 KiB  
Article
Insights into Freezeout Dynamics in Symmetric Heavy Ion Collisions with Changing Event Centrality
by Pei-Pin Yang, Atef Abdelkader, Lamiaa Galal Amin, Haji Muhammad Bilal Hussain, Ouazir Salem and Moustafa Salouci
Symmetry 2025, 17(5), 744; https://doi.org/10.3390/sym17050744 - 13 May 2025
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Abstract
This study presents the investigation of freezeout parameters, namely the kinetic freezeout temperature (T) and transverse flow velocity (βT), in different centrality intervals with fixed as well as with variable flow profile (n0) in the [...] Read more.
This study presents the investigation of freezeout parameters, namely the kinetic freezeout temperature (T) and transverse flow velocity (βT), in different centrality intervals with fixed as well as with variable flow profile (n0) in the blast-wave model (using Boltzmann Gibbs statistics). The model is used to fit the experimental data of transverse momentum spectra of π+, K+, and p in AuAu and PbPb collisions at 200 GeV and 2.76 TeV, respectively. In our observation, when the parameter n0 is considered as a free parameter, the parameter T decreases from head-on to peripheral collisions, while it increases towards the periphery if n0 is fixed. In addition, parameter βT decreases from central to peripheral collisions in both cases. These findings provide valuable insights into the dynamics of quark-gluon plasma formation and expansion in high-energy nuclear collisions. Moreover, the kinetic freezeout temperature T and the transverse flow velocity βT are mass-dependent; while the former becomes larger for massive particles, the latter becomes larger for light particles, showing the mass differential kinetic freezeout scenario. Full article
(This article belongs to the Special Issue Advances of Asymmetry/Symmetry in High Energy Physics)
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