Results from the first use of low radioactivity argon in a dark matter search

被引：138

作者：

Agnes, P. ^{[1
]}

Agostino, L. ^{[2
]}

Albuquerque, I. F. M. ^{[3
,4
]}

Alexander, T. ^{[5
,6
,7
]}

Alton, A. K. ^{[8
]}

Arisaka, K. ^{[9
]}

Back, H. O. ^{[3
,10
]}

Baldin, B. ^{[7
]}

Biery, K. ^{[7
]}

Bonfini, G. ^{[11
]}

Bossa, M. ^{[11
,12
]}

Bottino, B. ^{[13
,14
]}

Brigatti, A. ^{[15
]}

Brodsky, J. ^{[3
]}

Budano, F. ^{[16
,17
]}

Bussino, S. ^{[16
,17
]}

Cadeddu, M. ^{[18
,19
]}

Cadonati, L. ^{[5
,6
]}

Cadoni, M. ^{[18
,19
]}

Calaprice, F. ^{[3
]}

Canci, N. ^{[11
,20
]}

Candela, A. ^{[11
]}

Cao, H. ^{[3
]}

Cariello, M. ^{[14
]}

Carlini, M. ^{[11
]}

Catalanotti, S. ^{[21
,22
]}

Cavalcante, P. ^{[11
,23
]}

Chepurnov, A. ^{[24
]}

Cocco, A. G. ^{[22
]}

Covone, G. ^{[21
,22
]}

Crippa, L. ^{[15
,25
]}

D'Angelo, D. ^{[15
,25
]}

D'Incecco, M. ^{[11
]}

Davini, S. ^{[11
,12
]}

De Cecco, S. ^{[2
]}

De Deo, M. ^{[11
]}

De Vincenzi, M. ^{[16
,17
]}

Derbin, A. ^{[26
]}

Devoto, A. ^{[18
,19
]}

Di Eusanio, F. ^{[3
]}

Di Pietro, G. ^{[11
,15
]}

Edkins, E. ^{[27
]}

Empl, A. ^{[20
]}

Fan, A. ^{[9
]}

Fiorillo, G. ^{[21
,22
]}

Fomenko, K. ^{[28
]}

Forster, G. ^{[5
,6
,7
]}

Franco, D. ^{[1
]}

Gabriele, F. ^{[11
]}

Galbiati, C. ^{[3
,15
]}

机构：

[1] Univ Paris Diderot, Sorbonne Paris Cite, CEA Irfu, CNRS IN2P3,APC,Obs Paris, F-75205 Paris, France

[2] Univ Paris 06, Univ Paris Diderot, LPNHE Paris, CNRS IN2P3, F-75252 Paris, France

[3] Princeton Univ, Dept Phys, Princeton, NJ 08544 USA

[4] Univ Sao Paulo, Inst Fis, BR-05508090 Sao Paulo, Brazil

[5] Univ Massachusetts, Amherst Ctr Fundamental Interact, Amherst, MA 01003 USA

[6] Univ Massachusetts, Dept Phys, Amherst, MA 01003 USA

[7] Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA

[8] Augustana Univ, Dept Phys, Sioux Falls, SD 57197 USA

[9] Univ Calif Los Angeles, Dept Phys & Astron, Los Angeles, CA 90095 USA

[10] Pacific NW Natl Lab, Richland, WA 99354 USA

[11] Lab Nazl Gran Sasso, I-67010 Assergi, AQ, Italy

[12] Gran Sasso Sci Inst, I-67100 Laquila, AQ, Italy

[13] Univ Genoa, Dept Phys, I-16146 Genoa, Italy

[14] Ist Nazl Fis Nucl, Sez Genova, I-16146 Genoa, Italy

[15] Ist Nazl Fis Nucl, Sez Milano, I-20133 Milan, Italy

[16] Ist Nazl Fis Nucl, Sez Roma Tre, I-00146 Rome, Italy

[17] Univ Roma Tre, Dept Phys & Math, I-00146 Rome, Italy

[18] Univ Cagliari, Dept Phys, I-09042 Cagliari, Italy

[19] Ist Nazl Fis Nucl, Sez Cagliari, I-09042 Cagliari, Italy

[20] Univ Houston, Dept Phys, Houston, TX 77204 USA

[21] Univ Naples Federico II, Dept Phys, I-80126 Naples, Italy

[22] Ist Nazl Fis Nucl, Sez Napoli, I-80126 Naples, Italy

[23] Virginia Tech, Dept Phys, Blacksburg, VA 24061 USA

[24] Moscow MV Lomonosov State Univ, Skobeltsyn Inst Nucl Phys, Moscow 119991, Russia

[25] Univ Milan, Dept Phys, I-20133 Milan, Italy

[26] St Petersburg Nucl Phys Inst, NRC Kurchatov Inst, Gatchina 188350, Russia

[27] Univ Hawaii, Dept Phys & Astron, Honolulu, HI 96822 USA

[28] Joint Inst Nucl Res, Dubna 141980, Russia

[29] Temple Univ, Dept Phys, Philadelphia, PA 19122 USA

[30] Univ Chicago, Enrico Fermi Inst, Kavli Inst, Chicago, IL 60637 USA

[31] Univ Chicago, Dept Phys, Chicago, IL 60637 USA

[32] Inst High Energy Phys, Beijing 100049, Peoples R China

[33] Lab Subterraneo Canfranc, Canfranc Estn, Madrid 22880, Spain

[34] Univ Strasbourg, CNRS, IN2P3, IPHC, F-67037 Strasbourg, France

[35] Black Hills State Univ, Sch Nat Sci, Spearfish, SD 57799 USA

[36] Natl Acad Sci Ukraine, Inst Nucl Res, UA-03680 Kiev, Ukraine

[37] Belgorod Natl Res Univ, Radiat Phys Lab, Belgorod 308007, Russia

[38] SLAC Natl Accelerator Lab, Menlo Pk, CA 94025 USA

[39] Kurchatov Inst, Natl Res Ctr, Moscow 123182, Russia

[40] Natl Res Nucl Univ MEPhI, Moscow 115409, Russia

[41] Univ Perugia, Dept Chem Biol & Biotechnol, I-06123 Perugia, Italy

[42] Ist Nazl Fis Nucl, Sez Perugia, I-06123 Perugia, Italy

[43] Univ Calif Davis, Dept Phys, Davis, CA 95616 USA

[44] Jagiellonian Univ, Smoluchowski Inst Phys, PL-30348 Krakow, Poland

[45] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA

[46] Univ Estadual Campinas, Inst Phys Gleb Wataghin, BR-13083859 Sao Paulo, Brazil

[47] Univ Chinese Acad Sci, Sch Phys, Beijing 100049, Peoples R China

来源：

PHYSICAL REVIEW D | 2016年 / 93卷 / 08期

基金：

美国国家科学基金会; 巴西圣保罗研究基金会;

关键词：

INTERACTING MASSIVE PARTICLES; LIQUID ARGON; GRAN SASSO; AR-39;

D O I：

10.1103/PhysRevD.93.081101

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Liquid argon is a bright scintillator with potent particle identification properties, making it an attractive target for direct-detection dark matter searches. The DarkSide-50 dark matter search here reports the first WIMP search results obtained using a target of low-radioactivity argon. DarkSide-50 is a dark matter detector, using a two-phase liquid argon time projection chamber, located at the Laboratori Nazionali del Gran Sasso. The underground argon is shown to contain Ar-39 at a level reduced by a factor (1.4 +/- 0.2) x 10(3) relative to atmospheric argon. We report a background-free null result from (2616 +/- 43) kg d of data, accumulated over 70.9 live days. When combined with our previous search using an atmospheric argon, the 90% C.L. upper limit on the WIMP-nucleon spin-independent cross section, based on zero events found in the WIMP search regions, is 2.0 x 10(-4)4 cm(2) (8.6 x 10(-44) cm(2), 8.0 x 10(-43) cm(2)) for a WIMP mass of 100 GeV/c(2) (1 TeV/c(2), 10 TeV/c(2)).

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