Baryon-number-violating nucleon decays in SMEFT extended with a light scalar
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arXiv
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| Hauptverfasser: | , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866910025276981248 |
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| author | Ma, Xiao-Dong Schmidt, Michael A. Zhang, Weihang |
| author_facet | Ma, Xiao-Dong Schmidt, Michael A. Zhang, Weihang |
| contents | New light particles have received considerable attention in recent years. Baryon-number-violating (BNV) nucleon decays involving such light particles are able to provide stringent constraints. They exhibit distinctive experimental signatures that merit thorough investigation. We systematically investigate BNV nucleon decay with a light scalar in an effective field theory framework. Within this framework, we set stringent bounds on BNV operators using available experimental data and predict the occurrence of several BNV three-body nucleon decays. We further study contributions to dinucleon to dilepton transitions in a nucleus mediated by the scalar, which complements single nucleon decay. Finally, we provide three ultraviolet-complete models that can generate different subsets of BNV operators in leading order. Our theoretical framework will facilitate experimental searches for those exotic nucleon decays. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2511_02169 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Baryon-number-violating nucleon decays in SMEFT extended with a light scalar Ma, Xiao-Dong Schmidt, Michael A. Zhang, Weihang High Energy Physics - Phenomenology New light particles have received considerable attention in recent years. Baryon-number-violating (BNV) nucleon decays involving such light particles are able to provide stringent constraints. They exhibit distinctive experimental signatures that merit thorough investigation. We systematically investigate BNV nucleon decay with a light scalar in an effective field theory framework. Within this framework, we set stringent bounds on BNV operators using available experimental data and predict the occurrence of several BNV three-body nucleon decays. We further study contributions to dinucleon to dilepton transitions in a nucleus mediated by the scalar, which complements single nucleon decay. Finally, we provide three ultraviolet-complete models that can generate different subsets of BNV operators in leading order. Our theoretical framework will facilitate experimental searches for those exotic nucleon decays. |
| title | Baryon-number-violating nucleon decays in SMEFT extended with a light scalar |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2511.02169 |