Silicon detector results from the first five-tower run of CDMS II

CDMS Collaboration: R. Agnese (18); Z. Ahmed (1); A.J. Anderson (4),; S. Arrenberg (20); D. Balakishiyeva (18); R. Basu Thakur (2); D.A. Bauer (2),; A. Borgland (8); D. Brandt (8); P.L. Brink (8); T. Bruch (20); R. Bunker; (11); B. Cabrera (10); D.O. Caldwell (15); D.G. Cerdeno (13); H. Chagani; (19); J. Cooley (9); B. Cornell (1); C.H. Crewdson (6); P. Cushman (19); M.; Daal (14); F. Dejongh (2); P.C.F. Di Stefano (6); E. do Couto e Silva (8); T.; Doughty (14); L. Esteban (13); S. Fallows (19); E. Figueroa-Feliciano (4); J.; Filippini (1); J. Fox (6); M. Fritts (19); G.L. Godfrey (8); S.R. Golwala; (1); J. Hall (5); R.H. Harris (12); S.A. Hertel (4); T. Hofer (19); D.; Holmgren (2); L. Hsu (2); M.E. Huber (16); A. Jastram (12); O. Kamaev (6); B.; Kara (9); M.H. Kelsey (8); A. Kennedy (19); P. Kim (8); M. Kiveni (11); K.; Koch (19); M. Kos (11); S.W. Leman (4); E. Lopez-Asamar (13); R. Mahapatra; (12); V. Mandic (19); C. Martinez (6); K.A. McCarthy (4); N. Mirabolfathi; (14); R.A. Moffatt (10); D.C. Moore (1); P. Nadeau (6); R.H. Nelson (1); K.; Page (6); R. Partridge (8); M. Pepin (19); A. Phipps (14); K. Prasad (12); M.; Pyle (14); H. Qiu (9); W. Rau (6); P. Redl (10); A. Reisetter (17); Y. Ricci; (6); T. Saab (18); B. Sadoulet (14; 3); J. Sander (12); K. Schneck (8),; R.W. Schnee (11); S. Scorza (9); B. Serfass (14); B. Shank (10); D. Speller; (14); K.M. Sundqvist (14); A.N. Villano (19); B. Welliver (18); D.H. Wright; (8); S. Yellin (10); J.J. Yen (10); J. Yoo (2); B.A. Young (7); and J. Zhan; (19) ((1) California Institute of Technology; (2) Fermi National Accelerator; Laboratory; (3) Lawrence Berkeley National Laboratory; (4) Massachusetts; Institute of Technology; (5) Pacific Northwest National Laboratory; (6); Queen's University; (7) Santa Clara University; (8) SLAC National Accelerator; Laboratory / Kavli Institute for Particle Astrophysics; Cosmology; (9); Southern Methodist University; (10) Stanford University; (11) Syracuse; University; (12) Texas A & M University; (13) Universidad Autonoma de Madrid,; (14) University of California; Berkeley; (15) University of California; Santa; Barbara; (16) University of Colorado; Denver; (17) University of Evansville,; (18) University of Florida; Gainesville; (19) University of Minnesota; (20); University of Zurich)

arXiv:1304.3706·astro-ph.CO·September 17, 2013

Silicon detector results from the first five-tower run of CDMS II

CDMS Collaboration: R. Agnese (18), Z. Ahmed (1), A.J. Anderson (4),, S. Arrenberg (20), D. Balakishiyeva (18), R. Basu Thakur (2), D.A. Bauer (2),, A. Borgland (8), D. Brandt (8), P.L. Brink (8), T. Bruch (20), R. Bunker, (11), B. Cabrera (10), D.O. Caldwell (15)

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TL;DR

This paper reports a blind search for low-mass WIMPs using silicon detectors in the CDMS II experiment, setting new upper limits on WIMP-nucleon cross sections and excluding certain parameter spaces.

Contribution

First analysis of silicon detector data from CDMS II's full detector set, providing new constraints on low-mass WIMP interactions.

Findings

01

No candidate WIMP events observed.

02

Set an upper limit of 1.7x10^-41 cm^2 on WIMP-nucleon cross section.

03

Excluded parameter space relevant to recent low-mass WIMP searches.

Abstract

We report results of a search for Weakly Interacting Massive Particles (WIMPs) with the Si detectors of the CDMS II experiment. This report describes a blind analysis of the first data taken with CDMS II's full complement of detectors in 2006-2007; results from this exposure using the Ge detectors have already been presented. We observed no candidate WIMP-scattering events in an exposure of 55.9 kg-days before analysis cuts, with an expected background of ~1.1 events. The exposure of this analysis is equivalent to 10.3 kg-days over a recoil energy range of 7-100 keV for an ideal Si detector and a WIMP mass of 10 GeV/c2. These data set an upper limit of 1.7x10-41 cm2 on the WIMP-nucleon spin-independent cross section of a 10 GeV/c2 WIMP. These data exclude parameter space for spin-independent WIMP-nucleon elastic scattering that is relevant to recent searches for low-mass WIMPs.

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