| Autor: |
Arnquist, I., Avalos, N., Baxter, D., Bertou, X., Castello-Mor, N., Chavarria, A. E., Cuevas-Zepeda, J., Dastgheibi-Fard, A., De Dominicis, C., Deligny, O., Duarte-Campderros, J., Estrada, E., Gadola, N., Gaior, R., Hossbach, T., Iddir, L., Kavanagh, B. J., Kilminster, B., Lantero-Barreda, A., Lawson, I., Lee, S., Letessier-Selvon, A., Loaiza, P., Lopez-Virto, A., McGuire, K. J., Mitra, P., Munagavalasa, S., Norcini, D., Paul, S., Piers, A., Privitera, P., Robmann, P., Scorza, S., Settimo, M., Smida, R., Traina, M., Vilar, R., Warot, G., Yajur, R., Zopounidis, J-P. |
| Rok vydání: |
2023 |
| Předmět: |
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| Druh dokumentu: |
Working Paper |
| Popis: |
Dark Matter (DM) particles with sufficiently large cross sections may scatter as they travel through Earth's bulk. The corresponding changes in the DM flux give rise to a characteristic daily modulation signal in detectors sensitive to DM-electron interactions. Here, we report results obtained from the first underground operation of the DAMIC-M prototype detector searching for such a signal from DM with MeV-scale mass. A model-independent analysis finds no modulation in the rate of 1$e^-$ events with periods in the range 1-48 h. We then use these data to place exclusion limits on DM in the mass range [0.53, 2.7] MeV/c$^2$ interacting with electrons via a dark photon mediator. Taking advantage of the time-dependent signal we improve by $\sim$2 orders of magnitude on our previous limit obtained from the total rate of 1$e^-$ events, using the same data set. This daily modulation search represents the current strongest limit on DM-electron scattering via ultralight mediators for DM masses around 1 MeV/c$^2$. |
| Databáze: |
arXiv |
| Externí odkaz: |
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