Lepton flavor violating decays and in the N-B-LSSM

Rong-Zhi Sun; Shu-Min Zhao; Ming-Yue Liu; Xing-Yu Han; Song Gao; Xing-Xing Dong

doi:10.1140/epjc/s10052-025-14762-1

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2024 Impact factor 4.8

Particles and Fields

Open Access

Eur. Phys. J. C (2025) 85: 1038
https://doi.org/10.1140/epjc/s10052-025-14762-1

Regular Article - Theoretical Physics

Lepton flavor violating decays $l_{j} \to l_{i} γ,$ $l_j\rightarrow l_i\gamma ,$ $l_{j} \to 3 l_{i}$ $l_j \rightarrow 3l_i$ and $μ \to e + q \bar{q}$ $\mu \rightarrow e+ q\bar{q}$ in the N-B-LSSM

Rong-Zhi Sun¹^,2^,3, Shu-Min Zhao¹^,2^,3^a, Ming-Yue Liu¹^,2^,3, Xing-Yu Han¹^,2^,3, Song Gao¹^,2^,3 and Xing-Xing Dong¹^,2^,3^,4

¹ Department of Physics, Hebei University, 071002, Baoding, China
² Hebei Key Laboratory of High-Precision Computation and Application of Quantum Field Theory, 071002, Baoding, China
³ Hebei Research Center of the Basic Discipline for Computational Physics, 071002, Baoding, China
⁴ Departamento de Fisica and CFTP, Instituto Superior Técnico, Universidade de Lisboa, Av.Rovisco Pais 1, 1049-001, Lisbon, Portugal

^a zhaosm@hbu.edu.cn

Received: 16 April 2025
Accepted: 11 September 2025
Published online: 20 September 2025

Abstract

The N-B-LSSM is an extension of the minimal supersymmetric Standard Model (MSSM) with the addition of three singlet new Higgs superfields and right-handed neutrinos, whose local gauge group is $S U {(3)}_{C} \times S U {(2)}_{L} \times U {(1)}_{Y} \times U {(1)}_{B - L} .$ $SU(3)_C\times SU(2)_L\times U(1)_Y\times U(1)_{B-L}.$ In the N-B-LSSM, we study lepton flavor violating decays $l_{j} \to l_{i} γ,$ $l_j\rightarrow l_i\gamma ,$ $l_{j} \to 3 l_{i}$ $l_j \rightarrow 3l_i$ and $μ \to e + q \bar{q}$ $\mu \rightarrow e+ q\bar{q}$ $(j = τ, μ, i = μ, e$ $(j=\tau ,\mu ,~i=\mu ,e$ and $i \neq j) .$ $i\ne j).$ Based on the current experimental limits, we carry out detailed parameter scanning and numerical calculation to analyse the effects of different sensitive parameters on lepton flavor violation (LFV) in the N-B-LSSM. The numerical results show that the non-diagonal elements involving the initial and final leptons are main sensitive parameters and LFV sources. This work is conducive to exploring new physics (NP) beyond the Standard Model (SM).

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.

Funded by SCOAP³.

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Lepton flavor violating decays lj→liγ,lj→3li and μ→e+qq¯ in the N-B-LSSM

Conference announcements

Lepton flavor violating decays $l_{j} \to l_{i} γ,$ $l_j\rightarrow l_i\gamma ,$ $l_{j} \to 3 l_{i}$ $l_j \rightarrow 3l_i$ and $μ \to e + q \bar{q}$ $\mu \rightarrow e+ q\bar{q}$ in the N-B-LSSM