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Symmetry
Special Issues
Current Issues in Particle Physics
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Current Issues in Particle Physics

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

Deadline for manuscript submissions: closed (31 July 2024) | Viewed by 7958

Special Issue Editor

Prof. Dr. Jeffery Secrest

E-Mail Website
Guest Editor
Department of Physics and Astronomy, Armstrong Campus, Georgia Southern University, Savannah, GA 31419, USA
Interests: experimental neutrino physics; neutrino mass; neutrino oscillations; supernova physics; experimental flavor physics; strange quark content of the nucleon

Special Issue Information

Dear Colleagues,

The Standard Model of particle physics has been tested and verified with an astounding level of success for nearly 50 years in terms of describing elementary particles and their fundamental interactions. Despite a number of predictive successes, it is widely suspected that the Standard Model is a low energy effective theory. There are a number of aesthetically displeasing and unanswered questions associated with the Standard Model regarding the large number of arbitrary parameters, the origin of CP violation, neutrino masses, the Higgs mass being relatively low, and the replication of particle families, to name but a few. Currently there are a number of avenues being pursued in order to determine new physics beyond the Standard Model.

Experimentally, the search for physics beyond the Standard Model includes, as examples, searches for exotic decays, new particles, high-precision experiments looking for deviations in the Standard Model calculations of observables, and other such anomalies.

Theoretically, the search for new physics includes predictions associated with such topics as unified theories where the aim is to embed the Standard Model into a larger symmetry group exploiting new symmetries such as supersymmetry, the application of effective theories along with numerical calculations and experimental observables, and other such extensions to the Standard Model and beyond.

Another aspect associated with physics beyond the Standard Model is the understanding of the universe at large both observationally and theoretically. Observational cosmology has given particle physics another avenue for applications and constraints. Questions associated with the nature of dark matter, dark energy, and the asymmetry between matter and antimatter are not answered within the framework of particle physics and thus suggest new physics beyond the Standard Model.

In this Special Issue, original research articles and reviews are welcome. Research areas may include (but are not limited to) the following: grand unified theories, effective theories, neutrinoless double beta decay, exotic decays, quark and neutrino mixing parameters, lattice gauge theory, precision measurements in the electroweak sector, neutrino mass measurements, and experimental search for rare decays.

We look forward to receiving your contributions.

Submit your paper and select the Journal “Symmetry” and the Special Issue “Current Issues in Particle Physics” via: MDPI submission system. Our papers will be published on a rolling basis and we will be pleased to receive your submission once you have finished it.

 

Prof. Dr. Jeffery Secrest
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Symmetry is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2400 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • beyond the standard model
  • supersymmetric and grand unified models
  • neutrino mass, neutrino mixing, neutrino oscillations
  • CP violation in the quark and neutrino sectors
  • CKM matrix and PMNS matrix
  • probes of new physics by measurements of weak charge, magnetic moments, electric dipole moments, etc.
  • anomalous measurements
  • constraints on standard model parameters
  • dark matter
  • dark energy and the cosmological constant

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Further information on MDPI's Special Issue polices can be found here.

Published Papers (4 papers)

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Research

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19 pages, 448 KiB  
Article
Generic Behavior of Electromagnetic Fields of Regular Rotating Electrically Charged Compact Objects in Nonlinear Electrodynamics Minimally Coupled to Gravity
by Irina Dymnikova and Evgeny Galaktionov
Symmetry 2023, 15(1), 188; https://doi.org/10.3390/sym15010188 - 9 Jan 2023
Cited by 2 | Viewed by 1186
Abstract
Regular rotating electrically charged compact objects are described by nonlinear electrodynamics minimally coupled to gravity in a self-consistent way and without additional assumptions on the relation between the electromagnetic field and gravity. The electromagnetic fields obey the system of four source-free nonlinear equations [...] Read more.
Regular rotating electrically charged compact objects are described by nonlinear electrodynamics minimally coupled to gravity in a self-consistent way and without additional assumptions on the relation between the electromagnetic field and gravity. The electromagnetic fields obey the system of four source-free nonlinear equations for the electromagnetic tensor Fμν, with only two independent components due to spacetime symmetry determined by the algebraic structure of electromagnetic stress–energy tensors (pr=−ρ). In this paper, we present, for an arbitrary gauge-invariant Lagrangian, the general regular solution and generic behavior of electromagnetic fields, including the generic features of the Lagrange dynamics, for regular rotating electrically charged black holes and electromagnetic spinning solitons. Full article
(This article belongs to the Special Issue Current Issues in Particle Physics)
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8 pages, 264 KiB  
Article
On Baryogenesis from a Complex Inflaton
by James Unwin
Symmetry 2021, 13(12), 2449; https://doi.org/10.3390/sym13122449 - 20 Dec 2021
Viewed by 2015
Abstract
We derive the particle asymmetry due to inflationary baryogenesis involving a complex inflaton, obtaining a different result to that in the literature. While asymmetries were found to be significantly smaller than previously calculated, in certain parameter regions, baryogenesis can still be achieved. Full article
(This article belongs to the Special Issue Current Issues in Particle Physics)
18 pages, 328 KiB  
Article
Construction and Characterization of Representations of SU(7) for GUT Model Builders
by Daniel Jones and Jeffery A. Secrest
Symmetry 2021, 13(6), 1044; https://doi.org/10.3390/sym13061044 - 9 Jun 2021
Viewed by 2010
Abstract
The natural extension to the SU(5) Georgi-Glashow grand unification model is to enlarge the gauge symmetry group. In this work, the SU(7) symmetry group is examined. The Cartan subalgebra is determined along with their commutation relations. The [...] Read more.
The natural extension to the SU(5) Georgi-Glashow grand unification model is to enlarge the gauge symmetry group. In this work, the SU(7) symmetry group is examined. The Cartan subalgebra is determined along with their commutation relations. The associated roots and weights of the SU(7) algebra are derived and discussed. The raising and lowering operators are explicitly constructed and presented. Higher dimensional representations are developed by graphical as well as tensorial methods. Applications of the SU(7) Lie group to supersymmetric grand unification as well as applications are discussed. Full article
(This article belongs to the Special Issue Current Issues in Particle Physics)
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Review

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17 pages, 327 KiB  
Review
New Symmetries, Conserved Quantities and Gauge Nature of a Free Dirac Field
by Vladimir V. Kassandrov and Nina V. Markova
Symmetry 2021, 13(12), 2288; https://doi.org/10.3390/sym13122288 - 1 Dec 2021
Cited by 1 | Viewed by 1558
Abstract
We present and amplify some of our previous statements on non-canonical interrelations between the solutions to free Dirac equation (DE) and Klein–Gordon equation (KGE). We demonstrate that all the solutions to the DE (possessing point- or string-like singularities) can be obtained via differentiation [...] Read more.
We present and amplify some of our previous statements on non-canonical interrelations between the solutions to free Dirac equation (DE) and Klein–Gordon equation (KGE). We demonstrate that all the solutions to the DE (possessing point- or string-like singularities) can be obtained via differentiation of a corresponding pair of the KGE solutions for a doublet of scalar fields. In this way, we obtain a “spinor analogue” of the mesonic Yukawa potential and previously unknown chains of solutions to DE and KGE, as well as an exceptional solution to the KGE and DE with a finite value of the field charge (“localized” de Broglie wave). The pair of scalar “potentials” is defined up to a gauge transformation under which corresponding solution of the DE remains invariant. Under transformations of Lorentz group, canonical spinor transformations form only a subclass of a more general class of transformations of the solutions to DE upon which the generating scalar potentials undergo transformations of internal symmetry intermixing their components. Under continuous turn by one complete revolution the transforming solutions, as a rule, return back to their initial values (“spinor two-valuedness” is absent). With an arbitrary solution of the DE, one can associate, apart from the standard one, a non-canonical set of conserved quantities, positive definite “energy” density among them, and with any KGE solution-positive definite “probability density”, etc. Finally, we discuss a generalization of the proposed procedure to the case when the external electromagnetic field is present. Full article
(This article belongs to the Special Issue Current Issues in Particle Physics)
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