Improved WIMP-search reach of the CDMS II germanium data

被引：57

作者：

Agnese, R. ^{[23
]}

Anderson, A. J. ^{[5
]}

Asai, M. ^{[9
]}

Balakishiyeva, D. ^{[23
]}

Barker, D. ^{[25
]}

Thakur, R. Basu ^{[3
,24
]}

Bauer, D. A. ^{[3
]}

Billard, J. ^{[5
]}

Borgland, A. ^{[9
]}

Bowles, M. A. ^{[13
]}

Brandt, D. ^{[9
]}

Brink, P. L. ^{[9
]}

Bunker, R. ^{[10
]}

Cabrera, B. ^{[12
]}

Caldwell, D. O. ^{[20
]}

Calkins, R. ^{[11
]}

Cerdeno, D. G. ^{[2
]}

Chagani, H. ^{[25
]}

Chen, Y. ^{[13
]}

Cooley, J. ^{[11
]}

Cornell, B. ^{[1
]}

Crewdson, C. H. ^{[7
]}

Cushman, P. ^{[25
]}

Daal, M. ^{[19
]}

Di Stefano, P. C. F. ^{[7
]}

Doughty, T. ^{[19
]}

Esteban, L. ^{[16
,17
]}

Fallows, S. ^{[25
]}

Figueroa-Feliciano, E. ^{[5
]}

Godfrey, G. L. ^{[9
]}

Golwala, S. R. ^{[1
]}

Hall, J. ^{[6
]}

Harris, H. R. ^{[14
,15
]}

Hertel, S. A. ^{[5
]}

Hofer, T. ^{[25
]}

Holmgren, D. ^{[3
]}

Hsu, L. ^{[3
]}

Huber, M. E. ^{[21
]}

Jardin, D. ^{[11
]}

Jastram, A. ^{[14
,15
]}

Kamaev, O. ^{[7
]}

Kara, B. ^{[11
]}

Kelsey, M. H. ^{[9
]}

Kennedy, A. ^{[25
]}

Kiveni, M. ^{[13
]}

Koch, K. ^{[25
]}

Leder, A. ^{[5
]}

Loer, B. ^{[3
]}

Lopez Asamar, E. ^{[16
,17
]}

Lukens, P. ^{[3
]}

机构：

[1] CALTECH, Div Phys Math & Astron, Pasadena, CA 91125 USA

[2] Univ Durham, Dept Phys, Inst Particle Phys Phenomenol, Durham, England

[3] Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA

[4] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA

[5] MIT, Dept Phys, Cambridge, MA 02139 USA

[6] Pacific NW Natl Lab, Richland, WA 99352 USA

[7] Queens Univ, Dept Phys, Kingston, ON K7L 3N6, Canada

[8] Santa Clara Univ, Dept Phys, Santa Clara, CA 95053 USA

[9] Kavli Inst Particle Astrophys & Cosmol, SLAC Natl Accelerator Lab, Menlo Pk, CA 94025 USA

[10] South Dakota Sch Mines & Technol, Dept Phys, Rapid City, SD 57701 USA

[11] So Methodist Univ, Dept Phys, Dallas, TX 75275 USA

[12] Stanford Univ, Dept Phys, Stanford, CA 94305 USA

[13] Syracuse Univ, Dept Phys, Syracuse, NY 13244 USA

[14] Texas A&M Univ, Dept Phys & Astron, College Stn, TX 77843 USA

[15] Texas A&M Univ, Mitchell Inst Fundamental Phys & Astron, College Stn, TX 77843 USA

[16] Univ Autonoma Madrid, Dept Fis Teor, E-28049 Madrid, Spain

[17] Univ Autonoma Madrid, Inst Fis Teor UAM CSIC, E-28049 Madrid, Spain

[18] Univ British Columbia, Dept Phys & Astron, Vancouver, BC V6T 1Z1, Canada

[19] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA

[20] Univ Calif Santa Barbara, Dept Phys, Santa Barbara, CA 93106 USA

[21] Univ Colorado, Dept Phys, Denver, CO 80217 USA

[22] Univ Evansville, Dept Phys, Evansville, IN 47722 USA

[23] Univ Florida, Dept Phys, Gainesville, FL 32611 USA

[24] Univ Illinois, Dept Phys, Urbana, IL 61801 USA

[25] Univ Minnesota, Sch Phys & Astron, Minneapolis, MN 55455 USA

[26] Univ S Dakota, Dept Phys, Vermillion, SD 57069 USA

来源：

PHYSICAL REVIEW D | 2015年 / 92卷 / 07期

基金：

美国国家科学基金会; 美国能源部;

关键词：

HUBBLE-SPACE-TELESCOPE; DARK-MATTER; ROTATION CURVES; MASS; CONSTRAINTS; IONIZATION; DYNAMICS; REDSHIFT; NUCLEAR; PROOF;

D O I：

10.1103/PhysRevD.92.072003

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

CDMS II data from the five-tower runs at the Soudan Underground Laboratory were reprocessed with an improved charge-pulse fitting algorithm. Two new analysis techniques to reject surface-event backgrounds were applied to the 612 kg days germanium-detector weakly interacting massive particle (WIMP)-search exposure. An extended analysis was also completed by decreasing the 10 keV analysis threshold to similar to 5 keV, to increase sensitivity near a WIMP mass of 8 GeV/c(2). After unblinding, there were zero candidate events above a deposited energy of 10 keV and six events in the lower-threshold analysis. This yielded minimum WIMP-nucleon spin-independent scattering cross-section limits of 1.8 x 10(-44) and 1.18 x 10(-41) at 90% confidence for 60 and 8.6 GeV/c(2) WIMPs, respectively. This improves the previous CDMS II result by a factor of 2.4 (2.7) for 60 (8.6) GeV/c(2) WIMPs.

引用

页数：23

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