Radiogenic and muon-induced backgrounds in the LUX dark matter detector

Radiogenic and muon-induced backgrounds in the LUX dark matter detector

The Large Underground Xenon (LUX) dark matter experiment aims to detect rare low-energy interactions from Weakly Interacting Massive Particles (WIMPs). The radiogenic backgrounds in the LUX detector have been measured and compared with Monte Carlo simulation. Measurements of LUX high-energy data hav...

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Veröffentlicht in:Astroparticle physics 2015-03, Vol.62 (C), p.33-46
Hauptverfasser: Akerib, D.S., Araújo, H.M., Bai, X., Bailey, A.J., Balajthy, J., Bernard, E., Bernstein, A., Bradley, A., Byram, D., Cahn, S.B., Carmona-Benitez, M.C., Chan, C., Chapman, J.J., Chiller, A.A., Chiller, C., Coffey, T., Currie, A., de Viveiros, L., Dobi, A., Dobson, J., Druszkiewicz, E., Edwards, B., Faham, C.H., Fiorucci, S., Flores, C., Gaitskell, R.J., Gehman, V.M., Ghag, C., Gibson, K.R., Gilchriese, M.G.D., Hall, C., Hertel, S.A., Horn, M., Huang, D.Q., Ihm, M., Jacobsen, R.G., Kazkaz, K., Knoche, R., Larsen, N.A., Lee, C., Lindote, A., Lopes, M.I., Malling, D.C., Mannino, R., McKinsey, D.N., Mei, D.-M., Mock, J., Moongweluwan, M., Morad, J., Murphy, A.St.J., Nehrkorn, C., Nelson, H., Neves, F., Ott, R.A., Pangilinan, M., Parker, P.D., Pease, E.K., Pech, K., Phelps, P., Reichhart, L., Shutt, T., Silva, C., Solovov, V.N., Sorensen, P., O’Sullivan, K., Sumner, T.J., Szydagis, M., Taylor, D., Tennyson, B., Tiedt, D.R., Tripathi, M., Uvarov, S., Verbus, J.R., Walsh, N., Webb, R., White, J.T., Witherell, M.S., Wolfs, F.L.H., Woods, M., Zhang, C.
Format: Artikel
Sprache:eng
Schlagworte:
Dark matter
LUX
Material screening
Radioactive background
Simulation
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Zusammenfassung:The Large Underground Xenon (LUX) dark matter experiment aims to detect rare low-energy interactions from Weakly Interacting Massive Particles (WIMPs). The radiogenic backgrounds in the LUX detector have been measured and compared with Monte Carlo simulation. Measurements of LUX high-energy data have provided direct constraints on all background sources contributing to the background model. The expected background rate from the background model for the 85.3day WIMP search run is (2.6±0.2stat±0.4sys)×10-3 events keVee-1kg-1day-1 in a 118kg fiducial volume. The observed background rate is (3.6±0.4stat)×10-3 events keVee-1kg-1day-1, consistent with model projections. The expectation for the radiogenic background in a subsequent one-year run is presented.
ISSN:0927-6505
1873-2852
DOI:10.1016/j.astropartphys.2014.07.009