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Title: Improved WIMP-search reach of the CDMS II germanium data

Abstract

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 ~5keV, to increase sensitivity near a WIMP mass of 8GeV/c2. 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 1.8×10-44 and 1.18×10-41 at 90% confidence for 60 and 8.6GeV/c2 WIMPs, respectively. This improves the previous CDMS II result by a factor of 2.4 (2.7) for 60 (8.6)GeV/c2 WIMPs.

Authors:
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Publication Date:
Research Org.:
SLAC National Accelerator Lab., Menlo Park, CA (United States); Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States); Pacific Northwest National Lab. (PNNL), Richland, WA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP)
Contributing Org.:
SuperCDMS Collaboration
OSTI Identifier:
1263389
Alternate Identifier(s):
OSTI ID: 1212761; OSTI ID: 1224640; OSTI ID: 1226401; OSTI ID: 1454440
Report Number(s):
SLAC-PUB-16649; FERMILAB-PUB-15-173-AE; IPPP-15-24; DCTP-15-48; PNNL-SA-110143
Journal ID: ISSN 1550-7998; PRVDAQ; arXiv:1504.05871
Grant/Contract Number:  
AC02-76SF00515; AC02-07CH11359; AC05-76RL01830; AC02-05CH11231
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review. D, Particles, Fields, Gravitation and Cosmology
Additional Journal Information:
Journal Volume: 92; Journal Issue: 7; Journal ID: ISSN 1550-7998
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; 97 MATHEMATICS AND COMPUTING; astrophysics; experiment-HEP; HEPEX; 46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY

Citation Formats

Agnese, R., Anderson, A. J., Asai, M., Balakishiyeva, D., Barker, D., Basu Thakur, R., Bauer, D. A., Billard, J., Borgland, A., Bowles, M. A., Brandt, D., Brink, P. L., Bunker, R., Cabrera, B., Caldwell, D. O., Calkins, R., Cerdeño, D. G., Chagani, H., Chen, Y., Cooley, J., Cornell, B., Crewdson, C. H., Cushman, P., Daal, M., Di Stefano, P. C. F., Doughty, T., Esteban, L., Fallows, S., Figueroa-Feliciano, E., Godfrey, G. L., Golwala, S. R., Hall, J., Harris, H. R., Hertel, S. A., Hofer, T., Holmgren, D., Hsu, L., Huber, M. E., Jardin, D., Jastram, A., Kamaev, O., Kara, B., Kelsey, M. H., Kennedy, A., Kiveni, M., Koch, K., Leder, A., Loer, B., Lopez Asamar, E., Lukens, P., Mahapatra, R., Mandic, V., McCarthy, K. A., Mirabolfathi, N., Moffatt, R. A., Oser, S. M., Page, K., Page, W. A., Partridge, R., Pepin, M., Phipps, A., Prasad, K., Pyle, M., Qiu, H., Rau, W., Redl, P., Reisetter, A., Ricci, Y., Rogers, H. E., Saab, T., Sadoulet, B., Sander, J., Schneck, K., Schnee, R. W., Scorza, S., Serfass, B., Shank, B., Speller, D., Toback, D., Upadhyayula, S., Villano, A. N., Welliver, B., Wilson, J. S., Wright, D. H., Yang, X., Yellin, S., Yen, J. J., Young, B. A., and Zhang, J. Improved WIMP-search reach of the CDMS II germanium data. United States: N. p., 2015. Web. doi:10.1103/PhysRevD.92.072003.
Agnese, R., Anderson, A. J., Asai, M., Balakishiyeva, D., Barker, D., Basu Thakur, R., Bauer, D. A., Billard, J., Borgland, A., Bowles, M. A., Brandt, D., Brink, P. L., Bunker, R., Cabrera, B., Caldwell, D. O., Calkins, R., Cerdeño, D. G., Chagani, H., Chen, Y., Cooley, J., Cornell, B., Crewdson, C. H., Cushman, P., Daal, M., Di Stefano, P. C. F., Doughty, T., Esteban, L., Fallows, S., Figueroa-Feliciano, E., Godfrey, G. L., Golwala, S. R., Hall, J., Harris, H. R., Hertel, S. A., Hofer, T., Holmgren, D., Hsu, L., Huber, M. E., Jardin, D., Jastram, A., Kamaev, O., Kara, B., Kelsey, M. H., Kennedy, A., Kiveni, M., Koch, K., Leder, A., Loer, B., Lopez Asamar, E., Lukens, P., Mahapatra, R., Mandic, V., McCarthy, K. A., Mirabolfathi, N., Moffatt, R. A., Oser, S. M., Page, K., Page, W. A., Partridge, R., Pepin, M., Phipps, A., Prasad, K., Pyle, M., Qiu, H., Rau, W., Redl, P., Reisetter, A., Ricci, Y., Rogers, H. E., Saab, T., Sadoulet, B., Sander, J., Schneck, K., Schnee, R. W., Scorza, S., Serfass, B., Shank, B., Speller, D., Toback, D., Upadhyayula, S., Villano, A. N., Welliver, B., Wilson, J. S., Wright, D. H., Yang, X., Yellin, S., Yen, J. J., Young, B. A., & Zhang, J. Improved WIMP-search reach of the CDMS II germanium data. United States. doi:https://doi.org/10.1103/PhysRevD.92.072003
Agnese, R., Anderson, A. J., Asai, M., Balakishiyeva, D., Barker, D., Basu Thakur, R., Bauer, D. A., Billard, J., Borgland, A., Bowles, M. A., Brandt, D., Brink, P. L., Bunker, R., Cabrera, B., Caldwell, D. O., Calkins, R., Cerdeño, D. G., Chagani, H., Chen, Y., Cooley, J., Cornell, B., Crewdson, C. H., Cushman, P., Daal, M., Di Stefano, P. C. F., Doughty, T., Esteban, L., Fallows, S., Figueroa-Feliciano, E., Godfrey, G. L., Golwala, S. R., Hall, J., Harris, H. R., Hertel, S. A., Hofer, T., Holmgren, D., Hsu, L., Huber, M. E., Jardin, D., Jastram, A., Kamaev, O., Kara, B., Kelsey, M. H., Kennedy, A., Kiveni, M., Koch, K., Leder, A., Loer, B., Lopez Asamar, E., Lukens, P., Mahapatra, R., Mandic, V., McCarthy, K. A., Mirabolfathi, N., Moffatt, R. A., Oser, S. M., Page, K., Page, W. A., Partridge, R., Pepin, M., Phipps, A., Prasad, K., Pyle, M., Qiu, H., Rau, W., Redl, P., Reisetter, A., Ricci, Y., Rogers, H. E., Saab, T., Sadoulet, B., Sander, J., Schneck, K., Schnee, R. W., Scorza, S., Serfass, B., Shank, B., Speller, D., Toback, D., Upadhyayula, S., Villano, A. N., Welliver, B., Wilson, J. S., Wright, D. H., Yang, X., Yellin, S., Yen, J. J., Young, B. A., and Zhang, J. Mon . "Improved WIMP-search reach of the CDMS II germanium data". United States. doi:https://doi.org/10.1103/PhysRevD.92.072003. https://www.osti.gov/servlets/purl/1263389.
@article{osti_1263389,
title = {Improved WIMP-search reach of the CDMS II germanium data},
author = {Agnese, R. and Anderson, A. J. and Asai, M. and Balakishiyeva, D. and Barker, D. and Basu Thakur, R. and Bauer, D. A. and Billard, J. and Borgland, A. and Bowles, M. A. and Brandt, D. and Brink, P. L. and Bunker, R. and Cabrera, B. and Caldwell, D. O. and Calkins, R. and Cerdeño, D. G. and Chagani, H. and Chen, Y. and Cooley, J. and Cornell, B. and Crewdson, C. H. and Cushman, P. and Daal, M. and Di Stefano, P. C. F. and Doughty, T. and Esteban, L. and Fallows, S. and Figueroa-Feliciano, E. and Godfrey, G. L. and Golwala, S. R. and Hall, J. and Harris, H. R. and Hertel, S. A. and Hofer, T. and Holmgren, D. and Hsu, L. and Huber, M. E. and Jardin, D. and Jastram, A. and Kamaev, O. and Kara, B. and Kelsey, M. H. and Kennedy, A. and Kiveni, M. and Koch, K. and Leder, A. and Loer, B. and Lopez Asamar, E. and Lukens, P. and Mahapatra, R. and Mandic, V. and McCarthy, K. A. and Mirabolfathi, N. and Moffatt, R. A. and Oser, S. M. and Page, K. and Page, W. A. and Partridge, R. and Pepin, M. and Phipps, A. and Prasad, K. and Pyle, M. and Qiu, H. and Rau, W. and Redl, P. and Reisetter, A. and Ricci, Y. and Rogers, H. E. and Saab, T. and Sadoulet, B. and Sander, J. and Schneck, K. and Schnee, R. W. and Scorza, S. and Serfass, B. and Shank, B. and Speller, D. and Toback, D. and Upadhyayula, S. and Villano, A. N. and Welliver, B. and Wilson, J. S. and Wright, D. H. and Yang, X. and Yellin, S. and Yen, J. J. and Young, B. A. and Zhang, J.},
abstractNote = {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 ~5keV, to increase sensitivity near a WIMP mass of 8GeV/c2. 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 1.8×10-44 and 1.18×10-41 at 90% confidence for 60 and 8.6GeV/c2 WIMPs, respectively. This improves the previous CDMS II result by a factor of 2.4 (2.7) for 60 (8.6)GeV/c2 WIMPs.},
doi = {10.1103/PhysRevD.92.072003},
journal = {Physical Review. D, Particles, Fields, Gravitation and Cosmology},
number = 7,
volume = 92,
place = {United States},
year = {2015},
month = {10}
}

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