Low-mass constraints on WIMP effective models of inelastic scattering using the Migdal effect
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| Format: | Preprint |
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2024
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| _version_ | 1866912186949959680 |
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| author | Kang, Sunghyun Scopel, Stefano Tomar, Gaurav |
| author_facet | Kang, Sunghyun Scopel, Stefano Tomar, Gaurav |
| contents | We use the Migdal effect to extend to low masses the bounds on each of the effective couplings of the non-relativistic effective field theory of a WIMP of mass $m_χ$ and spin 1/2 that interacts inelastically with nuclei by either upscattering to a heavier state with mass splitting $δ>0$ or by downscattering to a lighter state with $δ<0$. In order to do so we perform a systematic analysis of the Migdal bounds in the $m_χ-δ$ parameter space comparing them to those from nuclear recoil searches. The Migdal effect allows to significantly extend to low WIMP masses the nuclear recoil bounds for $δ<0$. In this case the bounds are driven by XENON1T, except when $δ$ is vanishing or very small, when, depending on the WIMP-nucleus interaction, in the lower end of the $m_χ$ range either DS50 or SuperCDMS are more constraining. On the other hand, when $δ>0$ and the WIMP particle upscatters to a heavier state nuclear recoil bounds are stronger than those from the Migdal effect. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2407_16187 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Low-mass constraints on WIMP effective models of inelastic scattering using the Migdal effect Kang, Sunghyun Scopel, Stefano Tomar, Gaurav High Energy Physics - Phenomenology High Energy Physics - Experiment We use the Migdal effect to extend to low masses the bounds on each of the effective couplings of the non-relativistic effective field theory of a WIMP of mass $m_χ$ and spin 1/2 that interacts inelastically with nuclei by either upscattering to a heavier state with mass splitting $δ>0$ or by downscattering to a lighter state with $δ<0$. In order to do so we perform a systematic analysis of the Migdal bounds in the $m_χ-δ$ parameter space comparing them to those from nuclear recoil searches. The Migdal effect allows to significantly extend to low WIMP masses the nuclear recoil bounds for $δ<0$. In this case the bounds are driven by XENON1T, except when $δ$ is vanishing or very small, when, depending on the WIMP-nucleus interaction, in the lower end of the $m_χ$ range either DS50 or SuperCDMS are more constraining. On the other hand, when $δ>0$ and the WIMP particle upscatters to a heavier state nuclear recoil bounds are stronger than those from the Migdal effect. |
| title | Low-mass constraints on WIMP effective models of inelastic scattering using the Migdal effect |
| topic | High Energy Physics - Phenomenology High Energy Physics - Experiment |
| url | https://arxiv.org/abs/2407.16187 |