The DarkSide experiment: present status and future

Agnes, P.;Albuquerque, I. F. M.;Alexander, T.;Alton, A. K.;Asner, D. M.;Back, H. O.;Baldin, B.;Biery, K.;Bocci, V.;Bonfini, G.;Bonivento, W.;Bossa, M.;Bottino, B.;Brigatti, A.;Brodsky, J.;Budano, F.;Bussino, S.;CADEDDU, MATTEO;Cadonati, L.;CADONI, MARIANO;Calaprice, F.;Canci, N.;Candela, A.;CARAVATI, MAURO;Cariello, M.;Carlini, M.;Catalanotti, S.;Cavalcante, P.;Chepurnov, A.;Cicalo, C.;Cocco, A. G.;Covone, G.;D'Angelo, D.;D'Incecco, M.;Davini, S.;De Cecco, S.;De Deo, M.;De Vincenzi, M.;Derbin, A.;DEVOTO, ALBERTO;Eusanio, F. Di;Pietro, G. Di;Dionisi, C.;Edkins, E.;Empl, A.;Fan, A.;Fiorillo, G.;Fomenko, K.;Forster, G.;Franco, D.;Gabriele, F.;GALBIATI, CRISTIANO;Giagu, S.;Giganti, C.;Giovanetti, G. K.;Goretti, A. M.;Granato, F.;Grandi, L.;Gromov, M.;Guan, M.;Guardincerri, Y.;Hackett, B. R.;Herner, K.;Hughes, D.;Humble, P.;Hungerford, E. V.;Ianni, A.l.;Ianni, A.n.;James, I.;Johnson, T. N.;Jollet, C.;Keeter, K.;Kendziora, C. L.;Koh, G.;Korablev, D.;Korga, G.;Kubankin, A.;Li, X.;LISSIA, MARCELLO;Loer, B.;Lombardi, P.;Longo, G.;Ma, Y.;Machulin, I. N.;Mandarano, A.;Mari, S. M.;Maricic, J.;Marini, L.;Martoff, C. J.;Meregaglia, A.;Meyers, P. D.;Milincic, R.;Miller, J. D.;Montanari, D.;Monte, A.;Mount, B. J.;Muratova, V. N.;Musico, P.;Napolitano, J.;Agasson, A. Navrer;Odrowski, S.;Orsini, M.;Ortica, F.;Pagani, L.;Pallavicini, M.;Pantic, E.;Parmeggiano, S.;Pelczar, K.;Pelliccia, N.;Pocar, A.;Pordes, S.;Pugachev, D. A.;Qian, H.;Randle, K.;Ranucci, G.;Razeti, M.;Razeto, A.;Reinhold, B.;Renshaw, A. L.;Rescigno, M.;Riffard, Q.;Romani, A.;Rossi, B.;Rossi, N.;Rountree, D.;Sablone, D.;Saggese, P.;Saldanha, R.;Sands, W.;Savarese, C.;Schlitzer, B.;Segreto, E.;Semenov, D. A.;Shields, E.;Singh, P. N.;Skorokhvatov, M. D.;Smirnov, O.;Sotnikov, A.;Stanford, C.;Suvorov, Y.;Tartaglia, R.;Tatarowicz, J.;Testera, G.;Tonazzo, A.;Trinchese, P.;Unzhakov, E. V.;Verducci, M.;Vishneva, A.;Vogelaar, B.;Wada, M.;Walker, S.;Wang, H.;Wang, Y.;Watson, A. W.;Westerdale, S.;Wilhelmi, J.;Wojcik, M. M.;Xiang, X.i.;Xiao, X.;Xu, J.;Yang, C.;Zec, A.;Zhong, W.;Zhu, C.

2017-01-01

---

Abstract

DarkSide is a multi-stage program devoted to direct searches of Dark Matter particles with detectors based on double phase liquid Argon Time Projection Chamber. The DarkSide-50 setup is running underground at the Laboratori Nazionali del Gran Sasso. First it was operated with Atmospheric Argon and during that run (1422 ± 67) kg×d of truly background-free exposure has been accumulated. Obtained data made it possible to set a 90% C.L. upper limit on the WIMP-nucleon cross section of 6.1 × 10-44 cm2 (for a WIMP mass of 100 GeV/c2). Presently the detector is filled with Underground Argon, which is depleted in 39Ar by a factor of (1.4 ± 0.2)×103 with respect to Atmospheric Argon. Acquired so far (2616 ± 43) kg×d (71 live days) in combination with the data from the Atmospheric Argon run give us the 90% C.L. upper limit on the WIMP-nucleon spin-independent cross section of 2.0×10-44 cm2 for a WIMP mass of 100 GeV/c2. Up to date this is the best limit obtained with an argon target.