Could SBND-PRISM probe Lepton Flavor Violation?
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arXiv
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| Autores principales: | , , |
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| Formato: | Preprint |
| Publicado: |
2024
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| _version_ | 1866908386858106880 |
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| author | Alves, Gustavo F. S. Machado, Pedro A. N. Funchal, Renata Zukanovich |
| author_facet | Alves, Gustavo F. S. Machado, Pedro A. N. Funchal, Renata Zukanovich |
| contents | We investigate the possibility of using the Short-Baseline Near Detector (SBND) at Fermilab to constrain lepton flavor violating decays of pions and kaons. We study how to leverage SBND-PRISM, the use of the neutrino beam angular spread to mitigate systematic uncertainties, to enhance this analysis. We show that SBND-PRISM can put stringent limits on the flavor violating branching ratios $\rm{BR}(π^+ \to μ^+ ν_e) = 8.9 \times 10^{-4}$, $\rm{BR}(K^+ \to μ^+ ν_e) = 3.2 \times 10^{-3}$, improving previous constraints by factors 9 and 1.25, respectively. We also estimate the SBND-PRISM sensitivity to lepton number violating decays, $\rm{BR}(π^+ \to μ^+ \overlineν_e)= 2.1 \times 10^{-3}$ and $\rm{BR}(K^+ \to μ^+ \overlineν_e) = 7.4 \times 10^{-3}$, though not reaching previous BEBC limits. Last, we identify several ways how the SBND collaboration could improve this analysis. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2405_00777 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Could SBND-PRISM probe Lepton Flavor Violation? Alves, Gustavo F. S. Machado, Pedro A. N. Funchal, Renata Zukanovich High Energy Physics - Phenomenology We investigate the possibility of using the Short-Baseline Near Detector (SBND) at Fermilab to constrain lepton flavor violating decays of pions and kaons. We study how to leverage SBND-PRISM, the use of the neutrino beam angular spread to mitigate systematic uncertainties, to enhance this analysis. We show that SBND-PRISM can put stringent limits on the flavor violating branching ratios $\rm{BR}(π^+ \to μ^+ ν_e) = 8.9 \times 10^{-4}$, $\rm{BR}(K^+ \to μ^+ ν_e) = 3.2 \times 10^{-3}$, improving previous constraints by factors 9 and 1.25, respectively. We also estimate the SBND-PRISM sensitivity to lepton number violating decays, $\rm{BR}(π^+ \to μ^+ \overlineν_e)= 2.1 \times 10^{-3}$ and $\rm{BR}(K^+ \to μ^+ \overlineν_e) = 7.4 \times 10^{-3}$, though not reaching previous BEBC limits. Last, we identify several ways how the SBND collaboration could improve this analysis. |
| title | Could SBND-PRISM probe Lepton Flavor Violation? |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2405.00777 |