Search for Articles:
Title / Keyword
Author / Affiliation / Email
Journal
Article Type
 
 
Advanced Search
 
Section
Special Issue
Volume
Issue
Number
Page
 
5.3
2.2
Journals
Symmetry
Special Issues
Neutrinos and Symmetry: Theoretical Developments and New Directions
share announcement

Neutrinos and Symmetry: Theoretical Developments and New Directions

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

Deadline for manuscript submissions: 30 April 2026 | Viewed by 364

Special Issue Editors

Prof. Dr. Davide Meloni

E-Mail Website1 Website2
Guest Editor
Dipartimento di Matematica e Fisica, Università di Roma Tre, Via della Vasca Navale 84, 00146 Rome, Italy
Interests: theoretical physics; high energy physics; neutrinos
Dr. Alessio Giarnetti

E-Mail Website1 Website2
Guest Editor
Dipartimento di Matematica e Fisica, Universitá di Roma Tre, Via della Vasca Navale 84, 00146 Rome, Italy
Interests: neutrino theory; neutrinos; high energy physics

Special Issue Information

Dear Colleagues,

Neutrinos are special particles in many ways: on the one hand, their masses are orders of magnitude lighter than all other fermions, and on the other hand, their mixing matrix is substantially different from that measured in the quark sector. While measurements of their fundamental properties, like mass-squared differences and mixing angles, have recently reached remarkable experimental precision, the theoretical understanding of such values remains a deep mystery. Several efforts in the past have been devoted to searching for extensions of the Standard Model (SM) based on additional gauge and/or family symmetries that are able to explain neutrinos’ properties at the fundamental level.

In this volume, we want to offer an exhaustive overview of the proposed beyond-the-SM theories to accommodate neutrino masses and mixing and a panorama of the most recent research activity in the field.

Prof. Dr. Davide Meloni
Dr. Alessio Giarnetti
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

  • neutrino masses
  • neutrino mixing
  • symmetries
  • new physics
  • model building

Benefits of Publishing in a Special Issue

  • Ease of navigation: Grouping papers by topic helps scholars navigate broad scope journals more efficiently.
  • Greater discoverability: Special Issues support the reach and impact of scientific research. Articles in Special Issues are more discoverable and cited more frequently.
  • Expansion of research network: Special Issues facilitate connections among authors, fostering scientific collaborations.
  • External promotion: Articles in Special Issues are often promoted through the journal's social media, increasing their visibility.
  • Reprint: MDPI Books provides the opportunity to republish successful Special Issues in book format, both online and in print.

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

Published Papers (1 paper)

Order results
Result details
Show export options expand_more Show export options expand_less
Select all
Export citation of selected articles as:

Research

30 pages, 665 KB  
Article
Top-Down Analysis of Leptogenesis and Dirac Neutrino Masses in an Extended CP-Violating Standard Model
by Chilong Lin
Symmetry 2025, 17(11), 1888; https://doi.org/10.3390/sym17111888 - 6 Nov 2025
Abstract
We analytically investigate the charge parity (CP) violation, neutrino masses, and leptogenesis in the Standard Model (SM) with an extension to Dirac neutrinos, building on our previous quark sector analysis. Using systematic top-down diagonalization of fermion mass matrices and experimental neutrino mass-squared differences, [...] Read more.
We analytically investigate the charge parity (CP) violation, neutrino masses, and leptogenesis in the Standard Model (SM) with an extension to Dirac neutrinos, building on our previous quark sector analysis. Using systematic top-down diagonalization of fermion mass matrices and experimental neutrino mass-squared differences, we predict the complete neutrino mass spectrum and assess leptogenesis viability. We find that our analysis yields specific mass predictions: mh≈5.01×10−2 eV, ml≈6.09×10−3 eV, and a bimodal middle mass (mm≈4.97×10−2 eV for inverted ordering, mm≈1.05×10−2 eV for normal ordering). Four viable scenarios emerge with parameter constraints ranging from highly restrictive (1<g<1.01512) to moderately broad (1<g<5.9). Crucially, Dirac neutrino leptogenesis is about 71 orders of magnitude weaker than baryogenesis, indicating that Standard Model leptogenesis is negligible and Beyond Standard Model physics is needed for significant leptogenesis contributions. CP violation emerges through SN symmetry breaking, with mass degeneracies controlled by model parameters. Remarkably, while mass-squared differences are small, individual neutrino masses can be significantly larger, potentially addressing dark matter mass requirements and enhancing cosmological significance. This work provides testable predictions for neutrino experiments and establishes a unified analytical approach to CP violation across fermion sectors. Full article
(This article belongs to the Special Issue Neutrinos and Symmetry: Theoretical Developments and New Directions)
►▼ Show Figures

Figure 1

Show export options expand_more Show export options expand_less
Select all
Export citation of selected articles as:
 
Displaying articles 1-1
Back to TopTop