Results from a Low-Energy Analysis of the CDMS II Germanium Data
Zeeshan Ahmed(California Institute of Technology), D. S. Akerib(Case Western Reserve University), S. Arrenberg(University of Zurich), C. N. Bailey(Case Western Reserve University), D. Balakishiyeva(University of Florida), L. Baudis(University of Zurich), D. Bauer(Fermi National Accelerator Laboratory), P. L. Brink(SLAC National Accelerator Laboratory), T. Bruch(University of Zurich), R. Bunker(University of California, Santa Barbara), Blas Cabrera(Stanford University), D. O. Caldwell(University of California, Santa Barbara), J. Cooley(Southern Methodist University), E. do Couto e Silva(SLAC National Accelerator Laboratory), P. Cushman(University of Minnesota), M. Daal(University of California, Berkeley), F. DeJongh(Fermi National Accelerator Laboratory), P. Di Stefano(Queen's University), M. R. Dragowsky(Case Western Reserve University), L. Duong(University of Minnesota), S. Fallows(University of Minnesota), E. Figueroa‐Feliciano(Massachusetts Institute of Technology), J. P. Filippini(California Institute of Technology), J. Fox(Queen's University), M. Fritts(University of Minnesota), S. R. Golwala(California Institute of Technology), J. Hall(Fermi National Accelerator Laboratory), R. Hennings‐Yeomans(Case Western Reserve University), S. A. Hertel(Massachusetts Institute of Technology), D. Holmgren(Fermi National Accelerator Laboratory), L. Hsu(Fermi National Accelerator Laboratory), M. E. Huber(University of Colorado Denver), O. Kamaev(University of Minnesota), M. Kiveni(Syracuse University), M. Kos(Syracuse University), S. W. Leman(Massachusetts Institute of Technology), S. Liu(Queen's University), R. Mahapatra(Texas A&M University), V. Mandic(University of Minnesota), K. A. McCarthy(Massachusetts Institute of Technology), N. Mirabolfathi(University of California, Berkeley), David C. Moore(California Institute of Technology), H. Nelson(University of California, Santa Barbara), R. W. Ogburn(Stanford University), A. Phipps(University of California, Berkeley), M. Pyle(Stanford University), Xiaoxue Qiu(University of Minnesota), E. Ramberg(Fermi National Accelerator Laboratory), W. Rau(Queen's University), A. Reisetter(University of Minnesota), R. Resch(SLAC National Accelerator Laboratory), T. Saab(University of Florida), B. Sadoulet(Lawrence Berkeley National Laboratory), J. Sander(University of California, Santa Barbara), R. W. Schnee(Syracuse University), D. N. Seitz(University of California, Berkeley), B. Serfass(University of California, Berkeley), K. M. Sundqvist(University of California, Berkeley), M. Tarka(University of Zurich), P. Wikus(Massachusetts Institute of Technology), S. Yellin(University of California, Santa Barbara), J. Yoo(Fermi National Accelerator Laboratory), Betty Young(Santa Clara University), J. Zhang(University of Minnesota)
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Abstract
We report results from a reanalysis of data from the Cryogenic Dark Matter Search (CDMS II) experiment at the Soudan Underground Laboratory. Data taken between October 2006 and September 2008 using eight germanium detectors are reanalyzed with a lowered, 2 keV recoil-energy threshold, to give increased sensitivity to interactions from weakly interacting massive particles (WIMPs) with masses below ∼10 GeV/c(2). This analysis provides stronger constraints than previous CDMS II results for WIMP masses below 9 GeV/c(2) and excludes parameter space associated with possible low-mass WIMP signals from the DAMA/LIBRA and CoGeNT experiments.
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