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

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arxiv 1804.10697 v7 pith:TDILXE56 submitted 2018-04-27 hep-ex astro-ph.COphysics.ins-det

SuperCDMS Collaboration , R. Agnese , T. Aralis , T. Aramaki , I.J. Arnquist , E. Azadbakht , W. Baker , S. Banik
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D. Barker D.A. Bauer T. Binder M.A. Bowles P.L. Brink R. Bunker B. Cabrera R. Calkins C. Cartaro D.G. Cerdeno 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
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classification hep-exastro-ph.COphysics.ins-det
keywords darkmattercdmsconstraintsdemonstratedetectorfirstgram
verification ladder T0 review T1 audit T2 compute T3 formal
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abstract

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 gram CDMS HV device). These electron-recoil limits significantly improve experimental constraints on dark matter particles with masses as low as 1 MeV/$\mathrm{c^2}$. We demonstrate a sensitivity to dark photons competitive with other leading approaches but using substantially less exposure (0.49 gram days). These results demonstrate the scientific potential of phonon-mediated semiconductor detectors that are sensitive to single electronic excitations.

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