Nucleon decays into three leptons: Noncontact contributions
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arXiv
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| Main Authors: | , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866917397346123776 |
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| author | Chen, Jing Liao, Yi Ma, Xiao-Dong Wang, Hao-Lin |
| author_facet | Chen, Jing Liao, Yi Ma, Xiao-Dong Wang, Hao-Lin |
| contents | We investigate baryon number violating (BNV) nucleon decays into three leptons from noncontact contributions that are induced by dimension-6 (dim-6) BNV operators in low-energy effective field theory (LEFT) with an exchange of a baryon, meson, lepton, or photon field. We systematically classify all these processes that change lepton flavor by one unit and formulate their decay widths in terms of the dim-6 LEFT Wilson coefficients. By applying constraints on these Wilson coefficients derived from current experimental limits on BNV two-body nucleon decays, we obtain stringent bounds on the rates of these triple-lepton modes. These bounds vary significantly from one dim-6 operator to another under consideration. Our results for the $Δ(B-L)=0$ modes differ by several orders of magnitude from previous phase-space estimates in the literature, thereby providing a more reliable assessment of their potential occurrence. In addition, we provide improved bounds on $Δ(B+L)=0$ modes compared to the existing experimental limits. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2512_02692 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Nucleon decays into three leptons: Noncontact contributions Chen, Jing Liao, Yi Ma, Xiao-Dong Wang, Hao-Lin High Energy Physics - Phenomenology We investigate baryon number violating (BNV) nucleon decays into three leptons from noncontact contributions that are induced by dimension-6 (dim-6) BNV operators in low-energy effective field theory (LEFT) with an exchange of a baryon, meson, lepton, or photon field. We systematically classify all these processes that change lepton flavor by one unit and formulate their decay widths in terms of the dim-6 LEFT Wilson coefficients. By applying constraints on these Wilson coefficients derived from current experimental limits on BNV two-body nucleon decays, we obtain stringent bounds on the rates of these triple-lepton modes. These bounds vary significantly from one dim-6 operator to another under consideration. Our results for the $Δ(B-L)=0$ modes differ by several orders of magnitude from previous phase-space estimates in the literature, thereby providing a more reliable assessment of their potential occurrence. In addition, we provide improved bounds on $Δ(B+L)=0$ modes compared to the existing experimental limits. |
| title | Nucleon decays into three leptons: Noncontact contributions |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2512.02692 |