Low-Mass Dark Matter Search with the DarkSide-50 Experiment
High Energy Astrophysical Phenomena
2018-08-29 v3 Cosmology and Nongalactic Astrophysics
Abstract
We present the results of a search for dark matter WIMPs in the mass range below 20 GeV/c^2 using a target of low-radioactivity argon. The data were obtained using the DarkSide-50 apparatus at Laboratori Nazionali del Gran Sasso (LNGS). The analysis is based on the ionization signal, for which the DarkSide-50 time projection chamber is fully efficient at 0.1 keVee. The observed rate in the detector at 0.5 keVee is about 1.5 events/keVee/kg/day and is almost entirely accounted for by known background sources. We obtain a 90% C.L. exclusion limit above 1.8 GeV/c^2 for the spin-independent cross section of dark matter WIMPs on nucleons, extending the exclusion region for dark matter below previous limits in the range 1.8-6 GeV/c^2.
Keywords
Cite
@article{arxiv.1802.06994,
title = {Low-Mass Dark Matter Search with the DarkSide-50 Experiment},
author = {The DarkSide Collaboration and P. Agnes and I. F. M. Albuquerque and T. Alexander and A. K. Alton and G. R. Araujo and D. M. Asner and M. Ave and H. O. Back and B. Baldin and G. Batignani and K. Biery and V. Bocci and G. Bonfini and W. Bonivento and B. Bottino and F. Budano and S. Bussino and M. Cadeddu and M. Cadoni and F. Calaprice and A. Caminata and N. Canci and A. Candela and M. Caravati and M. Cariello and M. Carlini and M. Carpinelli and S. Catalanotti and V. Cataudella and P. Cavalcante and S. Cavuoti and R. Cereseto and A. Chepurnov and C. Cicalò and L. Cifarelli and A. G. Cocco and G. Covone and D. D'Angelo and M. D'Incecco and D. D'Urso and S. Davini and A. De Candia and S. De Cecco and M. De Deo and G. De Filippis and G. De Rosa and M. De Vincenzi and P. Demontis and A. V. Derbin and A. Devoto and F. Di Eusanio and G. Di Pietro and C. Dionisi and M. Downing and E. Edkins and A. Empl and A. Fan and G. Fiorillo and K. Fomenko and D. Franco and F. Gabriele and A. Gabrieli and C. Galbiati and P. Garcia Abia and C. Ghiano and S. Giagu and C. Giganti and G. K. Giovanetti and O. Gorchakov and A. M. Goretti and F. Granato and M. Gromov and M. Guan and Y. Guardincerri and M. Gulino and B. R. Hackett and M. H. Hassanshahi and K. Herner and B. Hosseini and D. Hughes and P. Humble and E. V. Hungerford and Al. Ianni and An. Ianni and V. Ippolito and I. James and T. N. Johnson and Y. Kahn and K. Keeter and C. L. Kendziora and I. Kochanek and G. Koh and D. Korablev and G. Korga and A. Kubankin and M. Kuss and M. La Commara and M. Lai and X. Li and M. Lisanti and M. Lissia and B. Loer and G. Longo and Y. Ma and A. A. Machado and I. N. Machulin and A. Mandarano and L. Mapelli and S. M. Mari and J. Maricic and C. J. Martoff and A. Messina and P. D. Meyers and R. Milincic and S. Mishra-Sharma and A. Monte and M. Morrocchi and B. J. Mount and V. N. Muratova and P. Musico and R. Nania and A. Navrer Agasson and A. O. Nozdrina and A. Oleinik and M. Orsini and F. Ortica and L. Pagani and M. Pallavicini and L. Pandola and E. Pantic and E. Paoloni and F. Pazzona and K. Pelczar and N. Pelliccia and V. Pesudo and A. Pocar and S. Pordes and S. S. Poudel and D. A. Pugachev and H. Qian and F. Ragusa and M. Razeti and A. Razeto and B. Reinhold and A. L. Renshaw and M. Rescigno and Q. Riffard and A. Romani and B. Rossi and N. Rossi and D. Sablone and O. Samoylov and W. Sands and S. Sanfilippo and M. Sant and R. Santorelli and C. Savarese and E. Scapparone and B. Schlitzer and E. Segreto and D. A. Semenov and A. Shchagin and A. Sheshukov and P. N. Singh and M. D. Skorokhvatov and O. Smirnov and A. Sotnikov and C. Stanford and S. Stracka and G. B. Suffritti and Y. Suvorov and R. Tartaglia and G. Testera and A. Tonazzo and P. Trinchese and E. V. Unzhakov and M. Verducci and A. Vishneva and B. Vogelaar and M. Wada and T. J. Waldrop and H. Wang and Y. Wang and A. W. Watson and S. Westerdale and M. M. Wojcik and M. Wojcik and X. Xiang and X. Xiao and C. Yang and Z. Ye and C. Zhu and A. Zichichi and G. Zuzel},
journal= {arXiv preprint arXiv:1802.06994},
year = {2018}
}
Comments
9 pages, 8 figures; submission accepted by journal