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Selected Papers from “Physics beyond the Standard Model in Leptonic...
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Selected Papers from “Physics beyond the Standard Model in Leptonic & Hadronic Processes and Relevant Computing Tools”

A special issue of Particles (ISSN 2571-712X).

Deadline for manuscript submissions: closed (20 November 2024) | Viewed by 4251

Special Issue Editors

Prof. Dr. Theocharis Kosmas

E-Mail Website
Guest Editor
Theoretical Physics Section, University of Ioannina, GR 451 10 Ioannina, Greece
Interests: nuclear physics; nuclear astrophysics; neutrino physics; nuclear structure; muon physics; cold dark matter physics; purely leptonic atoms; micro-quasar jet emissions
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Mario E. Gómez

E-Mail Website
Guest Editor
Department of Physics, University of Huelva, 21071 Huelva, Spain
Interests: elementary particle physics theory; astro-particle physics; dark matter physics; WIMP dark matter candidates; theory of muon g-2 anomaly; lepton flavor violation; cosmology; axion-like majoron physics; grand unified theories; supersymmetry; neutrino physics; neutrinos mass textures
Dr. Odysseas Kosmas

E-Mail Website
Guest Editor
Conigital Ltd., Birmingham-Coventry, Manchester, UK
Interests: machine learning (ML) and artificial intelligence (AI) in physical sciences; physics informed neural networks (PINNs); explainable AI (XAI); optimization techniques; mathematical methods in physical sciences; numerical solutions of fundamental ordinary and partial differential equations (ODEs and PDEs); differential geometry; mathematical physics; computational astronomy and astrophysics
Dr. Alessandro Spatafora

E-Mail Website
Guest Editor
Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali del Sud, Catania, Italy
Interests: nuclear physics; nuclear structure; nuclear reactions; neutrino physics; neutrino-less double beta decay

Special Issue Information

Dear Colleagues,

The Special Issue will host selected papers from the international workshop “Physics beyond the Standard Model in Leptonic & Hadronic Processes and Relevant Computing Tools”, which was successfully held in University of Athens, Greece, from 26 February to 1 March, 2024 (https://indico.cern.ch/event/1356673/). The Article Processing Charge (APC) for submissions from the workshop will be waived, and publication will be free of charge.

Prof. Dr. Theocharis Kosmas
Prof. Dr. Mario E. Gómez
Dr. Odysseas Kosmas
Dr. Alessandro Spatafora
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. Particles is an international peer-reviewed open access quarterly 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 1600 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

  • standard model of electroweak and strong interactions
  • beyond the standard model physics theories
  • Beta and double beta decay modes
  • neutrino-less double beta decay (theory and experiments)
  • nuclear reactions for weak interaction (theory and experiments)
  • spectroscopy of purely leptonic atoms
  • the positronium as a probe of discrete symmetries
  • the muonium bound spectrum (theory and experiments)
  • neutral current neutrino-nucleus scattering (coherent and incoherent channel)
  • direct detection of dark matter
  • physics-informed neural networks (PINNs) in particle physics
  • numerical solutions of fundamental differential equations

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

Published Papers (5 papers)

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Research

8 pages, 361 KiB  
Article
Theoretical WIMP–Nucleus Scattering Rates for Isomeric Nuclei
by John D. Vergados and Dennis Bonatsos
Particles 2024, 7(3), 810-817; https://doi.org/10.3390/particles7030048 - 10 Sep 2024
Cited by 1 | Viewed by 582
Abstract
The direct detection of dark matter constituents, particularly weakly interacting massive particles (WIMPs), is central to particle physics and cosmology. In this paper, we develop the formalism for WIMP–nucleus-induced transitions from isomeric nuclear states, with particular focus on the experimentally interesting target 180 [...] Read more.
The direct detection of dark matter constituents, particularly weakly interacting massive particles (WIMPs), is central to particle physics and cosmology. In this paper, we develop the formalism for WIMP–nucleus-induced transitions from isomeric nuclear states, with particular focus on the experimentally interesting target 180Ta. Full article
(This article belongs to the Special Issue Selected Papers from “Physics beyond the Standard Model in Leptonic & Hadronic Processes and Relevant Computing Tools”)
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11 pages, 524 KiB  
Article
Neutron Star–Dark Matter Admixed Objects in the Mass Gap Region
by Michael Vikiaris
Particles 2024, 7(3), 692-702; https://doi.org/10.3390/particles7030040 - 8 Aug 2024
Viewed by 628
Abstract
To this day, the nature of dark matter (DM) remains elusive despite all our efforts. This type of matter has not been directly observed, so we infer its gravitational effect. Since galaxies and supermassive objects like these are most likely to contain DM, [...] Read more.
To this day, the nature of dark matter (DM) remains elusive despite all our efforts. This type of matter has not been directly observed, so we infer its gravitational effect. Since galaxies and supermassive objects like these are most likely to contain DM, we assume that dense objects such as neutron stars (NSs) are also likely to host DM. The NS is considered the best natural laboratory for testing theories and collecting observational data. We mainly focus on two types of DM particles, fermions and bosons, with a mass range of [0.01–1.5] GeV and repulsive interactions of about [10−4–10−1] MeV−1. Using a two-fluid model to solve the TOV equations, we find stable configurations that span hundreds of kilometers and weigh tens or even hundreds of solar masses. To visualize results, we think of a giant invisible compact DM object and the NS in the center as the core, the only visible part. Stability criteria are met for these configurations, so collapsing into a black hole is unlikely. We go further and use this work for smaller formations that exist inside the mysterious Mass Gap. We also find stable configurations of 3–4 solar masses, with NS-DM mixing capable of describing the mass gap. Regardless, the present theoretical prediction, if combined with corresponding observations, could shed light on the existence of DM and even more on its fundamental properties. Full article
(This article belongs to the Special Issue Selected Papers from “Physics beyond the Standard Model in Leptonic & Hadronic Processes and Relevant Computing Tools”)
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9 pages, 5236 KiB  
Article
Beamline Optimisation for High-Intensity Muon Beams at PSI Using the Heterogeneous Island Model
by Eremey Valetov, Giovanni Dal Maso, Peter-Raymond Kettle, Andreas Knecht and Angela Papa
Particles 2024, 7(3), 683-691; https://doi.org/10.3390/particles7030039 - 1 Aug 2024
Viewed by 944
Abstract
The High Intensity Muon Beams (HIMB) project at the Paul Scherrer Institute (PSI) will deliver muon beams with unprecedented intensities of up to 1010muons/s for next-generation particle physics and material science experiments. This represents a hundredfold increase over the [...] Read more.
The High Intensity Muon Beams (HIMB) project at the Paul Scherrer Institute (PSI) will deliver muon beams with unprecedented intensities of up to 1010muons/s for next-generation particle physics and material science experiments. This represents a hundredfold increase over the current state-of-the-art muon intensities, also provided by PSI. We performed beam dynamics optimisations and studies for the design of the HIMB beamlines MUH2 and MUH3 using Graphics Transport, Graphics Turtle, and G4beamline, the latter incorporating PSI’s own measured π+ cross-sections and variance reduction. We initially performed large-scale beamline optimisations using asynchronous Bayesian optimisation with DeepHyper. We are now developing an island-based evolutionary optimisation code glyfada based on the Paradiseo framework, where we implemented Message Passing Interface (MPI) islands with OpenMP parallelisation within each island. Furthermore, we implemented an island model that is also suitable for high-throughput computing (HTC) environments with asynchronous communication via a Redis database. The code interfaces with the codes COSY INFINITY and G4beamline. The code glyfada will provide heterogeneous island model optimisation using evolutionary optimisation and local search methods, as well as part-wise optimisation of the beamline with automatic advancement through stages. We will use the glyfada for a future large-scale optimisation of the HIMB beamlines. Full article
(This article belongs to the Special Issue Selected Papers from “Physics beyond the Standard Model in Leptonic & Hadronic Processes and Relevant Computing Tools”)
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11 pages, 750 KiB  
Article
New Physics Opportunities at the DUNE Near Detector
by Pantelis Melas, Dimitrios K. Papoulias and Niki Saoulidou
Particles 2024, 7(3), 623-633; https://doi.org/10.3390/particles7030035 - 15 Jul 2024
Viewed by 607
Abstract
Focusing on elastic neutrino–electron scattering events, we explore the prospect of constraining new physics beyond the Standard Model at the DUNE Near Detector (ND). Specifically, we extract the attainable sensitivities for motivated scenarios such as neutrino generalized interactions (NGIs), the sterile neutrino dipole [...] Read more.
Focusing on elastic neutrino–electron scattering events, we explore the prospect of constraining new physics beyond the Standard Model at the DUNE Near Detector (ND). Specifically, we extract the attainable sensitivities for motivated scenarios such as neutrino generalized interactions (NGIs), the sterile neutrino dipole portal and unitarity violation. We furthermore examine the impact of the τ-optimized flux at the DUNE-ND and compare our results with those obtained using the standard CP-optimized flux. We find that our present analysis is probing a previously unexplored region of the parameter space, complementing existing results from cosmological observations and terrestrial experiments. Full article
(This article belongs to the Special Issue Selected Papers from “Physics beyond the Standard Model in Leptonic & Hadronic Processes and Relevant Computing Tools”)
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8 pages, 262 KiB  
Article
Deformed Shell Model Applications to Weak Interaction Processes
by R. Sahu, V. K. B. Kota and T. S. Kosmas
Particles 2024, 7(3), 595-602; https://doi.org/10.3390/particles7030033 - 29 Jun 2024
Cited by 1 | Viewed by 611
Abstract
The deformed shell model (DSM), based on Hartree–Fock intrinsic states with angular momentum projection and band mixing, has been found to be quite successful in describing many spectroscopic properties of nuclei in the A = 60–100 region. More importantly, DSM has been used [...] Read more.
The deformed shell model (DSM), based on Hartree–Fock intrinsic states with angular momentum projection and band mixing, has been found to be quite successful in describing many spectroscopic properties of nuclei in the A = 60–100 region. More importantly, DSM has been used recently with good success in calculating nuclear structure factors, which are needed for a variety of weak interaction processes. In this article, in addition to giving an overview of this, we discuss the applications of DSM to obtain cross-sections for coherent and incoherent neutrino nucleus scattering on 96,98,100Mo targets and also for obtaining two neutrino double beta decay nuclear transition matrix elements for 100Mo. Full article
(This article belongs to the Special Issue Selected Papers from “Physics beyond the Standard Model in Leptonic & Hadronic Processes and Relevant Computing Tools”)
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