Search for Low-Mass Weakly Interacting Massive Particles with SuperCDMS

Creators: Agnese, R.; Cornell, B. D.; Golwala, S. R.; Nelson, R. H.; SuperCDMS Collaboration

Abstract

We report a first search for weakly interacting massive particles (WIMPs) using the background rejection capabilities of SuperCDMS. An exposure of 577 kg days was analyzed for WIMPs with mass <30 GeV/c^2 , with the signal region blinded. Eleven events were observed after unblinding. We set an upper limit on the spin-independent WIMP-nucleon cross section of 1.2×10^( −42) cm^2 at 8 GeV/c^2 . This result is in tension with WIMP interpretations of recent experiments and probes new parameter space for WIMP-nucleon scattering for WIMP masses <6 GeV/c^2.

Additional Information

© 2014 American Physical Society. Received 12 March 2014; Published 20 June 2014. The SuperCDMS Collaboration gratefully acknowledges the contributions of numerous engineers and technicians. In addition, we gratefully acknowledge assistance from the staff of the Soudan Underground Laboratory and the Minnesota Department of Natural Resources. The iZIP detectors were fabricated in the Stanford Nanofabrication Facility, which is a member of the National Nanofabrication Infrastructure Network. This work is supported in part by the National Science Foundation, by the United States Department of Energy, by NSERC Canada, and by MultiDark (Spanish MINECO). Fermilab is operated by the Fermi Research Alliance, LLC under Contract No. De-AC02-07CH11359. SLAC is operated under Contract No. DE-AC02-76SF00515 with the United States Department of Energy.

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Published - PhysRevLett.112.241302.pdf

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