First Dark Matter Constraints from a SuperCDMS Single-Charge Sensitive Detector.

R Agnese,T Aralis,T Aramaki,I J Arnquist,E Azadbakht,W Baker,S Banik,D Barker,D A Bauer, T Binder,M A Bowles,P L Brink,R Bunker, B Cabrera,R Calkins, C Cartaro,D G Cerdeño,Y-Y Chang,J Cooley,B Cornell,P Cushman,P C F Di Stefano,T Doughty, E Fascione, E Figueroa-Feliciano,C Fink,M Fritts,G Gerbier,R Germond,M Ghaith,S R Golwala,H R Harris,Z Hong,E W Hoppe,L Hsu,M E Huber,V Iyer,D Jardin,C Jena, M H Kelsey,A Kennedy, A Kubik,N A Kurinsky, R E Lawrence, J V Leyva,B Loer,E Lopez Asamar,P Lukens, D MacDonell,R Mahapatra,V Mandic, N Mast,E H Miller,N Mirabolfathi,B Mohanty,J D Morales Mendoza,J Nelson,J L Orrell,S M Oser, W A Page, R Partridge,M Pepin,A Phipps, F Ponce,S Poudel,M Pyle,H Qiu,W Rau,A Reisetter,T Reynolds,A Roberts,A E Robinson, H E Rogers,R K Romani,T Saab, B Sadoulet,J Sander,A Scarff,R W Schnee, S Scorza,K Senapati,B Serfass,J So,D Speller,C Stanford,M Stein, J Street,H A Tanaka,D Toback,R Underwood,A N Villano,B von Krosigk,S L Watkins,J S Wilson,M J Wilson, J Winchell, D H Wright, S Yellin,B A Young,X Zhang,X Zhao

PHYSICAL REVIEW LETTERS（2018）

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摘要

We present the first limits on inelastic electron-scattering dark matter and dark photon absorption using a prototype SuperCDMS detector having a charge resolution of 0.1 electron-hole pairs (CDMS HVeV, a 0.93 g CDMS high-voltage device). These electron-recoil limits significantly improve experimental constraints on dark matter particles with masses as low as 1 MeV/c(2). We demonstrate a sensitivity to dark photons competitive with other leading approaches but using substantially less exposure (0.49 g d). These results demonstrate the scientific potential of phonon-mediated semiconductor detectors that are sensitive to single electronic excitations.

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