Searching. Please wait…
1582
37
170
29108
4409
2600
347
389
Abstract: 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 sidereal period, where a DM signal would appear. We then use these data to place exclusion limits on DM in the mass range [0.53,2.7] MeV/c2 interacting with electrons via a dark photon mediator. Taking advantage of the time-dependent signal we improve by -2 orders of magnitude on our previous limit obtained from the total rate of 1 e- events, using the same dataset. This daily modulation search represents the current strongest limit on DM-electron scattering via ultralight mediators for DM masses around 1 MeV/c2.
Fuente: Physical Review Letters, 2024, 132(10), 101006
Publisher: American Physical Society
Publication date: 01/03/2024
No. of pages: 7
Publication type: Article
DOI: 10.1103/PhysRevLett.132.101006
ISSN: 0031-9007,1079-7114
Spanish project: PID2019-109829 GB-I00
Publication Url: https://doi.org/10.1103/PhysRevLett.132.101006
Consult in UCrea Read publication
ARNQUIST, I.
AVALOS, N.
BAXTER, D.
BERTOU, X.
NURIA CASTELLÓ MOR
CHAVARRIA, A.E.
CUEVAS ZEPEDA, J.
DASTGHEIBI-FARD, A.
DE DOMINICIS, C.
DELIGNY, O.
JORGE DUARTE CAMPDERROS
ESTRADA, E.
GADOLA, N.
GAÏOR, R.
HOSSBACH, T.
IDDIR, L.
BRADLEY JAMES KAVANAGH
AGUSTIN LANTERO BARREDA
MARIA AMPARO LOPEZ VIRTO
ROCIO VILAR CORTABITARTE
Back