학술논문
Search for MeV Electron Recoils from Dark Matter in EXO-200
Document Type
Working Paper
Author
Collaboration, EXO-200; Kharusi, S. Al; Anton, G.; Badhrees, I.; Barbeau, P. S.; Beck, D.; Belov, V.; Bhatta, T.; Breidenbach, M.; Brunner, T.; Cao, G. F.; Cen, W. R.; Chambers, C.; Cleveland, B.; Coon, M.; Craycraft, A.; Daniels, T.; Darroch, L.; Daugherty, S. J.; Davis, J.; Delaquis, S.; Der Mesrobian-Kabakian, A.; DeVoe, R.; Dilling, J.; Dolgolenko, A.; Dolinski, M. J.; Echevers, J.; Fairbank Jr., W.; Fairbank, D.; Farine, J.; Feyzbakhsh, S.; Fierlinger, P.; Fu, Y. S.; Fudenberg, D.; Gautam, P.; Gornea, R.; Gratta, G.; Hall, C.; Hansen, E. V.; Hoessl, J.; Hufschmidt, P.; Hughes, M.; Iverson, A.; Jamil, A.; Jessiman, C.; Jewell, M. J.; Johnson, A.; Karelin, A.; Kaufman, L. J.; Koffas, T.; Krücken, R.; Kuchenkov, A.; Kumar, K. S.; Lan, Y.; Larson, A.; Lenardo, B. G.; Leonard, D. S.; Li, G. S.; Li, S.; Li, Z.; Licciardi, C.; Lin, Y. H.; MacLellan, R.; McElroy, T.; Michel, T.; Mong, B.; Moore, D. C.; Murray, K.; Njoya, O.; Nusair, O.; Odian, A.; Ostrovskiy, I.; Perna, A.; Piepke, A.; Pocar, A.; Retière, F.; Robinson, A. L.; Rowson, P. C.; Ruddell, D.; Runge, J.; Schmidt, S.; Sinclair, D.; Skarpaas, K.; Soma, A. K.; Stekhanov, V.; Tarka, M.; Thibado, S.; Todd, J.; Tolba, T.; Totev, T. I.; Tsang, R. H. M.; Veenstra, B.; Veeraraghavan, V.; Vogel, P.; Vuilleumier, J. -L.; Wagenpfeil, M.; Watkins, J.; Wen, L. J.; Wichoski, U.; Wrede, G.; Wu, S. X.; Xia, Q.; Yahne, D. R.; Yang, L.; Yen, Y. -R.; Zeldovich, O. Ya.; Ziegler, T.
Source
Phys. Rev. D 107, 012007 (2023)
Subject
Language
Abstract
We present a search for electron-recoil signatures from the charged-current absorption of fermionic dark matter using the EXO-200 detector. We report an average electron recoil background rate of $6.8 \times 10^{-4}\, \mathrm{cts}\,\mathrm{kg}^{-1}\mathrm{yr}^{-1}\mathrm{keV}^{-1}$ above $4\,\mathrm{MeV}$ and find no statistically significant excess over our background projection. Using a total ${}^{136}\mathrm{Xe}$ exposure of $234.1\,\mathrm{kg}\,\mathrm{yr}$ we exclude new parameter space for the charged-current absorption cross-section for dark matter masses between $m_\chi = 2.6\,\mathrm{MeV} - 11.6\,\mathrm{MeV}$ with a minimum of $6\times 10^{-51}\,\mathrm{cm}^2$ at $8.3\,\mathrm{MeV}$ at the $90\%$ confidence level.
Comment: 9 pages, 6 figures, 1 table
Comment: 9 pages, 6 figures, 1 table