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Selected Papers from 43rd International Conference of Theoretical Physics: Matter to the Deepest, Recent Developments In Physics Of Fundamental Interactions (MTTD2019)

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

Deadline for manuscript submissions: closed (31 December 2019) | Viewed by 17819

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Special Issue Editors

Prof. Dr. Janusz Gluza

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Guest Editor

Institute of Physics, University of Silesia in Katowice, Chorzow, Poland
Interests: particle physics
Special Issues, Collections and Topics in MDPI journals

Prof. Dr. Jan Sładkowski

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Co-Guest Editor

Institute of Physics, University of Silesia, 75 Pułku Piechoty 1, Pl 41-005 Chorzów, Poland
Interests: quantum field theory; quantum computing; mathematical physics; game theory
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Dr. Bartosz Dziewit

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Institute of Physics, University of Silesia in Katowice, Chorzow, Poland
Interests: particle physics
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Prof. Dr. Ilona Bednarek

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Co-Guest Editor

Department of Field Theory and Particle Physics, Institute of Physics, University of Silesia, Uniwersytecka 4, 40-007 Katowice, Poland
Interests: energy; nuclear matter; neutron star

Special Issue Information

Dear Colleagues,

Every second year, the Particle Physics and Astrophysics and Cosmology groups of the University of Silesia, Katowice, Poland, organize the International Conference on Theoretical Physics.

Traditionally, the topics we would like to cover are:

Precision tests of the Standard Model.
Low-energy physics.
Methods in multi-loop calculations.
Extensions of the Standard Model.
Neutrinos, astrophysics, and cosmology.

The conference participants are welcome to submit their contributions on the topic of their conference presentation to this Special Issue. Papers will be selected for publication.

The first 10 submissions accepted by Guest Editors are free of any charges. Additional contributions will be negotiated. The Article Processing Charge (APC) for publication in this open-access journal is as a rule 1400 CHF (Swiss Francs).

Prof. Dr. Janusz Gluza
Prof. Dr. Jan Sładkowski
Dr. Bartosz Dziewit
Prof. Dr. Ilona Bednarek
Guest Editors

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

Theoretical Physics

Published Papers (7 papers)

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Research

8 pages, 247 KiB

Open AccessArticle

Family Symmetries and Multi Higgs Doublet Models

by Bartosz Dziewit, Jacek Holeczek, Sebastian Zając and Marek Zrałek

Symmetry 2020, 12(1), 156; https://doi.org/10.3390/sym12010156 - 12 Jan 2020

Cited by 3 | Viewed by 2299

Abstract

Imposing a family symmetry on the Standard Model in order to reduce the number of its free parameters, due to the Schur’s Lemma, requires an explicit breaking of this symmetry. To avoid the need for this symmetry to break, additional Higgs doublets can be introduced. In such an extension of the Standard Model, we investigate family symmetries of the Yukawa Lagrangian. We find that adding a second Higgs doublet (2HDM) does not help, at least for finite subgroups of the

U (3)

group up to the order of 1025. Full article

(This article belongs to the Special Issue Selected Papers from 43rd International Conference of Theoretical Physics: Matter to the Deepest, Recent Developments In Physics Of Fundamental Interactions (MTTD2019))

15 pages, 765 KiB

Open AccessArticle

Doubly Charged Higgs Bosons and Spontaneous Symmetry Breaking at eV and TeV Scales

by Janusz Gluza, Magdalena Kordiaczyńska and Tripurari Srivastava

Symmetry 2020, 12(1), 153; https://doi.org/10.3390/sym12010153 - 11 Jan 2020

Cited by 3 | Viewed by 2344

Abstract

In this paper, beyond standard models are considered with additional scalar triplets without modification of the gauge group (Higgs Triplet Model—HTM) and with an extended gauge group [...] Read more.

In this paper, beyond standard models are considered with additional scalar triplets without modification of the gauge group (Higgs Triplet Model—HTM) and with an extended gauge group

S U {(2)}_{R} \otimes S U {(2)}_{L} \otimes U (1)

(Left–Right Symmetric Model—LRSM). These models differ drastically in possible triplet vacuum expectation values (VEV). Within the HTM, we needed to keep the triplet VEV at most within the range of GeV to keep the electroweak

ρ

parameter strictly close to 1, down to electronvolts due to the low energy constraints on lepton flavor-violating processes and neutrino oscillation parameters. For LRSM, the scale connected with the

S U {(2)}_{R}

triplet is relevant, and to provide proper masses of non-standard gauge bosons, VEV should at least be at the TeV level. Both models predict the existence of doubly charged scalar particles. In this paper, their production in the

e^{+} e^{-}

collider is examined for making a distinction in the s- and t- channels between the two models in scenarios when masses of doubly charged scalars are the same. Full article

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18 pages, 337 KiB

Open AccessArticle

Super-Weak Force and Neutrino Masses

by Zoltán Trócsányi

Symmetry 2020, 12(1), 107; https://doi.org/10.3390/sym12010107 - 6 Jan 2020

Cited by 16 | Viewed by 2231

Abstract

We consider an anomaly free extension of the standard model gauge group

G_{SM}

by an abelian group to

G_{SM} \otimes U {(1)}_{Z}

. The condition of anomaly cancellation is known to fix the Z-charges of the particles, [...] Read more.

We consider an anomaly free extension of the standard model gauge group

G_{SM}

by an abelian group to

G_{SM} \otimes U {(1)}_{Z}

. The condition of anomaly cancellation is known to fix the Z-charges of the particles, but two. We fix one remaining charge by allowing for all possible Yukawa interactions of the known left-handed neutrinos and new right-handed ones that obtain their masses through interaction with a new scalar field with spontaneously broken vacuum. We discuss some of the possible consequences of the model. Full article

12 pages, 289 KiB

Open AccessArticle

Does Our Universe Prefer Exotic Smoothness?

by Torsten Asselmeyer-Maluga, Jerzy Król and Tomasz Miller

Symmetry 2020, 12(1), 98; https://doi.org/10.3390/sym12010098 - 5 Jan 2020

Cited by 1 | Viewed by 2963

Abstract

Various experimentally verified values of physical parameters indicate that the universe evolves close to the topological phase of exotic smoothness structures on

R^{4}

and K3 surface. The structures determine the

α

parameter of the Starobinski model, the number of e-folds, the [...] Read more.

Various experimentally verified values of physical parameters indicate that the universe evolves close to the topological phase of exotic smoothness structures on

R^{4}

and K3 surface. The structures determine the

α

parameter of the Starobinski model, the number of e-folds, the spectral tilt, the scalar-to-tensor ratio and the GUT and electroweak energy scales, as topologically supported quantities. Neglecting exotic

R^{4}

and K3 leaves these free parameters undetermined. We present general physical and mathematical reasons for such preference of exotic smoothness. It appears that the spacetime should be formed on open domains of smooth

K 3 # \bar{C P^{2}}

at extra-large scales possibly exceeding our direct observational capacities. Such potent explanatory power of the formalism is not that surprising since there exist natural physical conditions, which we state explicitly, that allow for the unique determination of a spacetime within the exotic K3. Full article

9 pages, 308 KiB

Open AccessArticle

Axion Stars

by Hong Zhang

Symmetry 2020, 12(1), 25; https://doi.org/10.3390/sym12010025 - 20 Dec 2019

Cited by 19 | Viewed by 3313

Abstract

The dark matter particle can be a QCD axion or axion-like particle. A locally over-densed distribution of axions can condense into a bound Bose–Einstein condensate called an axion star, which can be bound by self-gravity or bound by self-interactions. It is possible that a significant fraction of the dark matter axion is in the form of axion stars. This would make some efforts searching for the axion as the dark matter particle more challenging, but at the same time it would also open up new possibilities. Some of the properties of axion stars, including their emission rates and their interactions with other astrophysical objects, are not yet completely understood. Full article

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8 pages, 328 KiB

Open AccessArticle

The Grimus–Neufeld Model with FlexibleSUSY at One-Loop

by Simonas Draukšas, Vytautas Dūdėnas, Thomas Gajdosik, Andrius Juodagalvis, Paulius Juodsnukis and Darius Jurčiukonis

Symmetry 2019, 11(11), 1418; https://doi.org/10.3390/sym11111418 - 16 Nov 2019

Viewed by 2269

Abstract

The Grimus–Neufeld model can explain the smallness of measured neutrino masses by extending the Standard Model with a single heavy neutrino and a second Higgs doublet, using the seesaw mechanism and radiative mass generation. The Grimus–Lavoura approximation allows us to calculate the light neutrino masses analytically. By inverting these analytic expressions, we determine the neutrino Yukawa couplings from the measured neutrino mass differences and the neutrino mixing matrix. Short-cutting the full renormalization of the model, we implement the Grimus–Neufeld model in the spectrum calculator FlexibleSUSY and check the consistency of the implementation. These checks hint that FlexibleSUSY is able to do the job of numerical renormalization in a restricted parameter space. As a summary, we also comment on further steps of the implementation and the use of FlexibleSUSY for the model. Full article

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9 pages, 352 KiB

Open AccessFeature PaperArticle

Exponentiation in QED and Quasi-Stable Charged Particles

by Stanisław Jadach, Wiesław Płaczek and Maciej Skrzypek

Symmetry 2019, 11(11), 1389; https://doi.org/10.3390/sym11111389 - 8 Nov 2019

Cited by 2 | Viewed by 1581

Abstract

In this note we present a new exponentiation scheme of soft photon radiation from charged quasi-stable resonances. It generalizes the well established scheme of Yennie, Frautschi and Suura. While keeping the same functional form of an exponent, the new scheme is both exact in its soft limit and accounts properly for the kinematical shift in resonant propagators. We present the scheme on an example of two processes: a toy model of single W production in

e ν

scattering and the W pair production and decay in

e^{+} e^{-}

annihilation. The latter process is of relevance for the planned FCCee collider where high precision of Monte Carlo simulations is a primary goal. The proposed scheme is a step in this direction. Full article

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Selected Papers from 43rd International Conference of Theoretical Physics: Matter to the Deepest, Recent Developments In Physics Of Fundamental Interactions (MTTD2019)

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