First Results from the DarkSide-50 Dark Matter Experiment at Laboratori Nazionali del Gran Sasso
Creators: name: Agnes, P.
name: Alexander, T.
name: Alton, A.
name: Arisaka, K.
name: Back, H. O.
name: Baldin, B.
name: Biery, K.
name: Bonfini, G.
name: Bossa, M.
name: Brigatti, A.
name: Brodsky, J.
name: Budano, F.
name: Cadonati, L.
name: Calaprice, F.
name: Canci, N.
name: Candela, A.
name: Cao, H.
name: Cariello, M.
name: Cavalcante, P.
name: Chavarria, A.
name: Chepurnov, A.
name: Cocco, A. G.
name: Crippa, L.
name: D'Angelo, D.
name: D'Incecco, M.
name: Davini, S.
name: De Deo, M.
name: Derbin, A.
name: Devoto, A.
name: Di Eusanio, F.
name: Di Pietro, G.
name: Edkins, E.
name: Empl, A.
name: Fan, A.
name: Fiorillo, G.
name: Fomenko, K.
name: Forster, G.
name: Franco, D.
name: Gabriele, F.
name: Galbiati, C.
name: Goretti, A.
name: Grandi, L.
name: Gromov, M.
name: Guan, M. Y.
name: Guardincerri, Y.
name: Hackett, B.
name: Herner, K.
name: Hungerford, E. V.
name: Ianni, Al.
name: Ianni, An.
name: Jollet, C.
name: Keeter, K.
name: Kendziora, C.
name: Kidner, S.
name: Kobychev, V.
name: Koh, G.
name: Korablev, D.
name: Korga, G.
name: Kurlej, A.
name: Li, P. X.
name: Loer, B.
name: Lombardi, P.
name: Love, C.
name: Ludhova, L.
name: Luitz, S.
name: Ma, Y. Q.
name: Machulin, I.
name: Mandarano, A.
name: Mari, S.
name: Maricic, J.
name: Marini, L.
name: Martoff, C. J.
name: Meregaglia, A.
name: Meroni, E.
name: Meyers, P. D.
name: Milincic, R.
name: Montanari, D.
name: Monte, A.
name: Montuschi, M.
name: Monzani, M. E.
name: Mosteiro, P.
name: Mount, B.
name: Muratova, V.
name: Musico, P.
name: Nelson, A.
name: Odrowski, S.
name: Okounkova, M.
name: Orsini, M.
name: Ortica, F.
name: Pagani, L.
name: Pallavicini, M.
name: Pantic, E.
name: Papp, L.
name: Parmeggiano, S.
name: Parsells, R.
name: Pelczar, K.
name: Pelliccia, N.
name: Perasso, S.
name: Pocar, A.
name: Pordes, S.
name: Pugachev, D.
name: Qian, H.
name: Randle, K.
name: Ranucci, G.
name: Razeto, A.
name: Reinhold, B.
name: Renshaw, A.
name: Romani, A.
name: Rossi, B.
name: Rossi, N.
name: Rountree, S. D.
name: Sablone, D.
name: Saggese, P.
name: Saldanha, R.
name: Sands, W.
name: Sangiorgio, S.
name: Segreto, E.
name: Semenov, D.
name: Shields, E.
name: Skorokhvatov, M.
name: Smirnov, O.
name: Sotnikov, A.
name: Stanford, C.
name: Suvorov, Y.
name: Tartaglia, R.
name: Tatarowicz, J.
name: Testera, G.
name: Tonazzo, A.
name: Unzhakov, E.
name: Vogelaar, R. B.
name: Wada, M.
name: Walker, S.
name: Wang, H.
name: Wang, Y.
name: Watson, A.
name: Westerdale, S.
name: Wojcik, M.
name: Wright, A.
name: Xiang, X.
name: Xu, J.
name: Yang, C. G.
name: Yoo, J.
name: Zavatarelli, S.
name: Zec, A.
name: Zhu, C.
name: Zuzel, G.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: High Energy Physics - Experiment (hep-ex)
subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences
subject: FOS: Physical sciences

description: We report the first results of DarkSide-50, a direct search for dark matter operating in the underground Laboratori Nazionali del Gran Sasso (LNGS) and searching for the rare nuclear recoils possibly induced by weakly interacting massive particles (WIMPs). The dark matter detector is a Liquid Argon Time Projection Chamber with a (46.4+-0.7) kg active mass, operated inside a 30 t organic liquid scintillator neutron veto, which is in turn installed at the center of a 1 kt water Cherenkov veto for the residual flux of cosmic rays. We report here the null results of a dark matter search for a (1422+-67) kg d exposure with an atmospheric argon fill. This is the most sensitive dark matter search performed with an argon target, corresponding to a 90% CL upper limit on the WIMP-nucleon spin-independent cross section of 6.1x10^-44 cm^2 for a WIMP mass of 100 GeV/c^2.
description: 26 pages, 7 figures; updated figures and references, notably Fig. 7 has updated CDMSII curve; fixed typos; clarified some language and figures; updated references