Missing energy signatures of inelastic magnetic dipole DM at NA64e
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arXiv
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| Autori principali: | , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2026
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| _version_ | 1866908920897863680 |
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| author | Gninenko, Sergei N. Krasnikov, N. V. Voronchikhin, I. V. Kirpichnikov, D. V. |
| author_facet | Gninenko, Sergei N. Krasnikov, N. V. Voronchikhin, I. V. Kirpichnikov, D. V. |
| contents | Some extensions of the Standard Model consider inelastic dark matter (iDM) as an attractive candidate for sub-GeV DM of thermal origin that could be detected at modern accelerators. In the present paper, we calculate the production rate of iDM pairs $χ_{1} \barχ_0$ interacting with the ordinary photon via dipole magnetic moment in the reaction of high-energy electron scattering on nuclei, $e^- N \to e^- N χ_{1} \barχ_0$, in the NA64e experiment at the CERN SPS. We derive the projected sensitivity of NA64e to such particles assuming of $\simeq10^{13}$ 100 GeV electrons on target. We also show, that incorporating heavy vector meson decays, $γ^* N \to N V (\to χ_1 \barχ_0)$, alongside bremsstrahlung-like emission of inelastic dark matter pairs, $e^- N \to e^- N γ^* (\to χ_1 \barχ_0)$, will allow NA64e to probe previously unexplored regions of the iDM parameter space, in particular for modest mass splittings, $Δ\simeq 5 \times 10^{-2}$, and relatively light masses, $m_{χ_0} \lesssim 100~\mbox{MeV}$. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2603_28278 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Missing energy signatures of inelastic magnetic dipole DM at NA64e Gninenko, Sergei N. Krasnikov, N. V. Voronchikhin, I. V. Kirpichnikov, D. V. High Energy Physics - Phenomenology Some extensions of the Standard Model consider inelastic dark matter (iDM) as an attractive candidate for sub-GeV DM of thermal origin that could be detected at modern accelerators. In the present paper, we calculate the production rate of iDM pairs $χ_{1} \barχ_0$ interacting with the ordinary photon via dipole magnetic moment in the reaction of high-energy electron scattering on nuclei, $e^- N \to e^- N χ_{1} \barχ_0$, in the NA64e experiment at the CERN SPS. We derive the projected sensitivity of NA64e to such particles assuming of $\simeq10^{13}$ 100 GeV electrons on target. We also show, that incorporating heavy vector meson decays, $γ^* N \to N V (\to χ_1 \barχ_0)$, alongside bremsstrahlung-like emission of inelastic dark matter pairs, $e^- N \to e^- N γ^* (\to χ_1 \barχ_0)$, will allow NA64e to probe previously unexplored regions of the iDM parameter space, in particular for modest mass splittings, $Δ\simeq 5 \times 10^{-2}$, and relatively light masses, $m_{χ_0} \lesssim 100~\mbox{MeV}$. |
| title | Missing energy signatures of inelastic magnetic dipole DM at NA64e |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2603.28278 |