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878 results on '"Serfass, B."'

1. Light Dark Matter Constraints from SuperCDMS HVeV Detectors Operated Underground with an Anticoincidence Event Selection

Author

SuperCDMS Collaboration, Albakry, M. F., Alkhatib, I., Alonso-González, D., Amaral, D. W. P., Anczarski, J., Aralis, T., Aramaki, T., Arnquist, I. J., Langroudy, I. Ataee, Azadbakht, E., Bathurst, C., Bhattacharyya, R., Biffl, A. J., Brink, P. L., Buchanan, M., Bunker, R., Cabrera, B., Calkins, R., Cameron, R. A., Cartaro, C., Cerdeño, D. G., Chang, Y. -Y., Chaudhuri, M., Chen, J. -H., Chen, R., Chott, N., Cooley, J., Coombes, H., Cushman, P., Cyna, R., Das, S., De Brienne, F., Dharani, S., di Vacri, M. L., Diamond, M. D., Elwan, M., Fascione, E., Figueroa-Feliciano, E., Fouts, K., Fritts, M., Germond, R., Ghaith, M., Golwala, S. R., Hall, J., Harms, S. A. S., Harris, K., Hassan, N., Hong, Z., Hoppe, E. W., Hsu, L., Huber, M. E., Iyer, V., Jardin, D., Kashyap, V. K. S., Keller, S. T. D., Kelsey, M. H., Kennard, K. T., Kubik, A., Kurinsky, N. A., Lee, M., Leyva, J., Liu, J., Liu, Y., Loer, B., Asamar, E. Lopez, Lukens, P., MacFarlane, D. B., Mahapatra, R., Mammo, J. S., Mast, N., Mayer, A. J., Theenhausen, H. Meyer zu, Michaud, É., Michielin, E., Mirabolfathi, N., Mirzakhani, M., Mohanty, B., Monteiro, D., Nelson, J., Neog, H., Novati, V., Orrell, J. L., Osborne, M. D., Oser, S. M., Pandey, L., Pandey, S., Partridge, R., Pedreros, D. S., Peng, W., Perna, L., Perry, W. L., Podviianiuk, R., Poudel, S. S., Pradeep, A., Pyle, M., Rau, W., Reid, E., Ren, R., Reynolds, T., Rios, M., Roberts, A., Robinson, A. E., Ryan, J. L., Saab, T., Sadek, D., Sadoulet, B., Sahoo, S. P., Saikia, I., Sander, J., Sattari, A., Schmidt, B., Schnee, R. W., Scorza, S., Serfass, B., Simchony, A., Sincavage, D. J., Sinervo, P., Street, J., Sun, H., Tanner, E., Terry, G. D., Toback, D., Verma, S., Villano, A. N., von Krosigk, B., Watkins, S. L., Wen, O., Williams, Z., Wilson, M. J., Winchell, J., Wykoff, K., Yellin, S., Young, B. A., Yu, T. C., Zatschler, B., Zatschler, S., Zaytsev, A., Zhang, E., Zheng, L., Zuniga, A., and Zurowski, M. J.

Subjects
High Energy Physics - Experiment, Astrophysics - Cosmology and Nongalactic Astrophysics, Physics - Instrumentation and Detectors
Abstract

This article presents constraints on dark-matter-electron interactions obtained from the first underground data-taking campaign with multiple SuperCDMS HVeV detectors operated in the same housing. An exposure of 7.63 g-days is used to set upper limits on the dark-matter-electron scattering cross section for dark matter masses between 0.5 and 1000 MeV/$c^2$, as well as upper limits on dark photon kinetic mixing and axion-like particle axioelectric coupling for masses between 1.2 and 23.3 eV/$c^2$. Compared to an earlier HVeV search, sensitivity was improved as a result of an increased overburden of 225 meters of water equivalent, an anticoincidence event selection, and better pile-up rejection. In the case of dark-matter-electron scattering via a heavy mediator, an improvement by up to a factor of 25 in cross-section sensitivity was achieved., Comment: 7 pages + title and references, 4 figures, and 1 table

Published
2024

2. First Demonstration of the HeRALD Superfluid Helium Detector Concept

Author

Anthony-Petersen, R., Biekert, A., Chang, C. L., Chang, Y., Chaplinsky, L., Dushkin, A., Fink, C. W., Garcia-Sciveres, M., Guo, W., Hertel, S. A., Li, X., Lin, J., Mahapatra, R., Matava, W., McKinsey, D. N., Osterman, D. Z., Patel, P. K., Penning, B., Pinckney, H. D., Platt, M., Pyle, M., Qi, Y., Reed, M., Rischbieter, G. R. C, Romani, R. K., Serafin, A., Serfass, B., Smith, R. J., Sorensen, P., Suerfu, B., Suzuki, A., Velan, V., Wang, G., Wang, Y., Watkins, S. L., and Williams, M. R.

Subjects
Physics - Instrumentation and Detectors, High Energy Physics - Experiment
Abstract

The SPICE/HeRALD collaboration is performing R&D to enable studies of sub-GeV dark matter models using a variety of target materials. Here we report our recent progress on instrumenting a superfluid $^4$He target mass with a transition-edge sensor based calorimeter to detect both atomic signals (scintillation) and $^4$He quasiparticle (phonon and roton) excitations. The sensitivity of HeRALD to the critical "quantum evaporation" signal from $^4$He quasiparticles requires us to block the superfluid film flow to the calorimeter. We have developed a heat-free film-blocking method employing an unoxidized Cs film, which we implemented in a prototype "HeRALD v0.1" detector of ~10 g target mass. This article reports initial studies of the atomic and quasiparticle signal channels. A key result of this work is the measurement of the quantum evaporation channel's gain of 0.15 $\pm$ 0.01, which will enable $^4$He-based dark matter experiments in the near term. With this gain the HeRALD detector reported here has an energy threshold of 145 eV at 5 sigma, which would be sensitive to dark matter masses down to 220 MeV/c$^2$., Comment: 14 pages, 9 figures

Published
2023
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3. First measurement of the nuclear-recoil ionization yield in silicon at 100 eV

Author

Albakry, M. F., Alkhatib, I., Alonso, D., Amaral, D. W. P., An, P., Aralis, T., Aramaki, T., Arnquist, I. J., Langroudy, I. Ataee, Azadbakht, E., Banik, S., Barbeau, P. S., Bathurst, C., Bhattacharyya, R., Brink, P. L., Bunker, R., Cabrera, B., Calkins, R., Cameron, R. A., Cartaro, C., Cerdeño, D. G., Chang, Y. -Y., Chaudhuri, M., Chen, R., Chott, N., Cooley, J., Coombes, H., Corbett, J., Cushman, P., Das, S., De Brienne, F., Rios, M., Dharani, S., di Vacri, M. L., Diamond, M. D., Elwan, M., Fascione, E., Figueroa-Feliciano, E., Fink, C. W., Fouts, K., Fritts, M., Gerbier, G., Germond, R., Ghaith, M., Golwala, S. R., Hall, J., Hassan, N., Hedges, S. C., Hines, B. A., Hong, Z., Hoppe, E. W., Hsu, L., Huber, M. E., Iyer, V., Kashyap, V. K. S., Kelsey, M. H., Kubik, A., Kurinsky, N. A., Lee, M., Li, A., Li, L., Litke, M., Liu, J., Liu, Y., Loer, B., Asamar, E. Lopez, Lukens, P., MacFarlane, D. B., Mahapatra, R., Mandic, V., Mast, N., Mayer, A. J., Theenhausen, H. Meyer zu, Michaud, ., Michielin, E., Mirabolfathi, N., Mohanty, B., Nebolsky, B., Nelson, J., Neog, H., Novati, V., Orrell, J. L., Osborne, M. D., Oser, S. M., Page, W. A., Pandey, S., Partridge, R., Pedreros, D. S., Perna, L., Podviianiuk, R., Ponce, F., Poudel, S., Pradeep, A., Pyle, M., Rau, W., Reid, E., Ren, R., Reynolds, T., Roberts, A., Robinson, A. E., Runge, J., Saab, T., Sadek, D., Sadoulet, B., Saikia, I., Sander, J., Sattari, A., Schmidt, B., Schnee, R. W., Scorza, S., Serfass, B., Poudel, S. S., Sincavage, D. J., Sinervo, P., Speaks, Z., Street, J., Sun, H., Thasrawala, F. K., Toback, D., Underwood, R., Verma, S., Villano, A. N., von Krosigk, B., Watkins, S. L., Wen, O., Williams, Z., Wilson, M. J., Winchell, J., Wykoff, K., Yellin, S., Young, B. A., Yu, T. C., Zatschler, B., Zatschler, S., Zaytsev, A., Zeolla, A., Zhang, E., Zheng, L., Zheng, Y., and Zuniga, A.

Subjects
Physics - Instrumentation and Detectors, Astrophysics - Instrumentation and Methods for Astrophysics, High Energy Physics - Experiment, Nuclear Experiment
Abstract

We measured the nuclear--recoil ionization yield in silicon with a cryogenic phonon-sensitive gram-scale detector. Neutrons from a mono-energetic beam scatter off of the silicon nuclei at angles corresponding to energy depositions from 4\,keV down to 100\,eV, the lowest energy probed so far. The results show no sign of an ionization production threshold above 100\,eV. These results call for further investigation of the ionization yield theory and a comprehensive determination of the detector response function at energies below the keV scale.

Published
2023
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4. A Search for Low-mass Dark Matter via Bremsstrahlung Radiation and the Migdal Effect in SuperCDMS

Author

Albakry, M. F., Alkhatib, I., Alonso, D., Amaral, D. W. P., Aralis, T., Aramaki, T., Arnquist, I. J., Langroudy, I. Ataee, Azadbakht, E., Banik, S., Bathurst, C., Bhattacharyya, R., Brink, P. L., Bunker, R., Cabrera, B., Calkins, R., Cameron, R. A., Cartaro, C., Cerdeño, D. G., Chang, Y. -Y., Chaudhuri, M., Chen, R., Chott, N., Cooley, J., Coombes, H., Corbett, J., Cushman, P., Das, S., De Brienne, F., Rios, M., Dharani, S., di Vacri, M. L., Diamond, M. D., Elwan, M., Fascione, E., Figueroa-Feliciano, E., Fink, C. W., Fouts, K., Fritts, M., Gerbier, G., Germond, R., Ghaith, M., Golwala, S. R., Hall, J., Hassan, N., Hines, B. A., Hong, Z., Hoppe, E. W., Hsu, L., Huber, M. E., Iyer, V., Jardin, D., Kashyap, V. K. S., Kelsey, M. H., Kubik, A., Kurinsky, N. A., Lee, M., Li, A., Litke, M., Liu, J., Liu, Y., Loer, B., Asamar, E. Lopez, Lukens, P., MacFarlane, D. B., Mahapatra, R., Mast, N., Mayer, A. J., Theenhausen, H. Meyer zu, Michaud, É., Michielin, E., Mirabolfathi, N., Mohanty, B., Nelson, J., Neog, H., Novati, V., Orrell, J. L., Osborne, M. D., Oser, S. M., Page, W. A., Pandey, S., Partridge, R., Pedreros, D. S., Perna, L., Podviianiuk, R., Ponce, F., Poudel, S., Pradeep, A., Pyle, M., Rau, W., Reid, E., Ren, R., Reynolds, T., Roberts, A., Robinson, A. E., Saab, T., Sadek, D., Sadoulet, B., Saikia, I., Sander, J., Sattari, A., Schmidt, B., Schnee, R. W., Scorza, S., Serfass, B., Poudel, S. S., Sincavage, D. J., Sinervo, P., Street, J., Sun, H., Terry, G. D., Thasrawala, F. K., Toback, D., Underwood, R., Verma, S., Villano, A. N., von Krosigk, B., Watkins, S. L., Wen, O., Williams, Z., Wilson, M. J., Winchell, J., Wu, C. -P., Wykoff, K., Yellin, S., Young, B. A., Yu, T. C., Zatschler, B., Zatschler, S., Zaytsev, A., Zhang, E., Zheng, L., and Zuniga, A.

Subjects
High Energy Physics - Experiment, High Energy Physics - Phenomenology
Abstract

We present a new analysis of previously published of SuperCDMS data using a profile likelihood framework to search for sub-GeV dark matter (DM) particles through two inelastic scattering channels: bremsstrahlung radiation and the Migdal effect. By considering these possible inelastic scattering channels, experimental sensitivity can be extended to DM masses that are undetectable through the DM-nucleon elastic scattering channel, given the energy threshold of current experiments. We exclude DM masses down to $220~\textrm{MeV}/c^2$ at $2.7 \times 10^{-30}~\textrm{cm}^2$ via the bremsstrahlung channel. The Migdal channel search provides overall considerably more stringent limits and excludes DM masses down to $30~\textrm{MeV}/c^2$ at $5.0 \times 10^{-30}~\textrm{cm}^2$., Comment: Submitted to PRD

Published
2023
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5. Effective Field Theory Analysis of CDMSlite Run 2 Data

Author

SuperCDMS Collaboration, Albakry, M. F., Alkhatib, I., Amaral, D. W. P., Aralis, T., Aramaki, T., Arnquist, I. J., Langroudy, I. Ataee, Azadbakht, E., Banik, S., Bathurst, C., Bauer, D. A., Bezerra, L. V. S., Bhattacharyya, R., Brink, P. L., Bunker, R., Cabrera, B., Calkins, R., Cameron, R. A., Cartaro, C., Cerdeño, D. G., Chang, Y. -Y., Chaudhuri, M., Chen, R., Chott, N., Cooley, J., Coombes, H., Corbett, J., Cushman, P., De Brienne, F., Dharani, S., di Vacri, M. L., Diamond, M. D., Fascione, E., Figueroa-Feliciano, E., Fink, C. W., Fouts, K., Fritts, M., Gerbier, G., Germond, R., Ghaith, M., Golwala, S. R., Hall, J., Hassan, N., Hines, B. A., Hollister, M. I., Hong, Z., Hoppe, E. W., Hsu, L., Huber, M. E., Iyer, V., Jastram, A., Kashyap, V. K. S., Kelsey, M. H., Kubik, A., Kurinsky, N. A., Lawrence, R. E., Lee, M., Li, A., Liu, J., Liu, Y., Loer, B., Lukens, P., MacFarlane, D. B., Mahapatra, R., Mandic, V., Mast, N., Mayer, A. J., Theenhausen, H. Meyer zu, Michaud, É., Michielin, E., Mirabolfathi, N., Mohanty, B., Nagorny, S., Nelson, J., Neog, H., Novati, V., Orrell, J. L., Osborne, M. D., Oser, S. M., Page, W. A., Partridge, R., Pedreros, D. S., Podviianiuk, R., Ponce, F., Poudel, S., Pradeep, A., Pyle, M., Rau, W., Reid, E., Ren, R., Reynolds, T., Roberts, A., Robinson, A. E., Rogers, H. E., Saab, T., Sadoulet, B., Saikia, I., Sander, J., Sattari, A., Schmidt, B., Schnee, R. W., Scorza, S., Serfass, B., Poudel, S. S., Sincavage, D. J., Stanford, C., Street, J., Sun, H., Thasrawala, F. K., Toback, D., Underwood, R., Verma, S., Villano, A. N., von Krosigk, B., Watkins, S. L., Wen, O., Williams, Z., Wilson, M. J., Winchell, J., Wykoff, K., Yellin, S., Young, B. A., Yu, T. C., Zatschler, B., Zatschler, S., Zaytsev, A., Zhang, E., Zheng, L., and Zuber, S.

Subjects
Astrophysics - Cosmology and Nongalactic Astrophysics, High Energy Physics - Experiment
Abstract

CDMSlite Run 2 was a search for weakly interacting massive particles (WIMPs) with a cryogenic 600 g Ge detector operated in a high-voltage mode to optimize sensitivity to WIMPs of relatively low mass from 2 - 20 GeV/$c^2$. In this article, we present an effective field theory (EFT) analysis of the CDMSlite Run 2 data using an extended energy range and a comprehensive treatment of the expected background. A binned likelihood Bayesian analysis was performed on the recoil energy data, taking into account the parameters of the EFT interactions and optimizing the data selection with respect to the dominant background components. Energy regions within 5$\sigma$ of known activation peaks were removed from the analysis. The Bayesian evidences resulting from the different operator hypotheses show that the CDMSlite Run 2 data are consistent with the background-only models and do not allow for a signal interpretation assuming any additional EFT interaction. Consequently, upper limits on the WIMP mass and coupling-coefficient amplitudes and phases are presented for each EFT operator. These limits improve previous CDMSlite Run 2 bounds for WIMP masses above 5 GeV/$c^2$., Comment: 16 pages, 8 figures

Published
2022

6. Investigating the sources of low-energy events in a SuperCDMS-HVeV detector

Author

SuperCDMS Collaboration, Albakry, M. F., Alkhatib, I., Amaral, D. W. P., Aralis, T., Aramaki, T., Arnquist, I. J., Langroudy, I. Ataee, Azadbakht, E., Banik, S., Bathurst, C., Bauer, D. A., Bhattacharyya, R., Brink, P. L., Bunker, R., Cabrera, B., Calkins, R., Cameron, R. A., Cartaro, C., Cerdeño, D. G., Chang, Y. -Y., Chaudhuri, M., Chen, R., Chott, N., Cooley, J., Coombes, H., Corbett, J., Cushman, P., De Brienne, F., Dharani, S., di Vacri, M. L., Diamond, M. D., Fascione, E., Figueroa-Feliciano, E., Fink, C. W., Fouts, K., Fritts, M., Gerbier, G., Germond, R., Ghaith, M., Golwala, S. R., Hall, J., Hassan, N., Hines, B. A., Hollister, M. I., Hong, Z., Hoppe, E. W., Hsu, L., Huber, M. E., Iyer, V., Jastram, A., Kashyap, V. K. S., Kelsey, M. H., Kubik, A., Kurinsky, N. A., Lawrence, R. E., Lee, M., Li, A., Liu, J., Liu, Y., Loer, B., Asamar, E. Lopez, Lukens, P., MacFarlane, D. B., Mahapatra, R., Mandic, V., Mast, N., Mayer, A. J., Theenhausen, H. Meyer zu, Michaud, É., Michielin, E., Mirabolfathi, N., Mohanty, B., Nagorny, S., Nelson, J., Neog, H., Novati, V., Orrell, J. L., Osborne, M. D., Oser, S. M., Page, W. A., Partridge, R., Pedreros, D. S., Podviianiuk, R., Ponce, F., Poudel, S., Pradeep, A., Pyle, M., Rau, W., Reid, E., Ren, R., Reynolds, T., Roberts, A., Robinson, A. E., Saab, T., Sadoulet, B., Saikia, I., Sander, J., Sattari, A., Schmidt, B., Schnee, R. W., Scorza, S., Serfass, B., Poudel, S. S., Sincavage, D. J., Stanford, C., Street, J., Sun, H., Thasrawala, F. K., Toback, D., Underwood, R., Verma, S., Villano, A. N., von Krosigk, B., Watkins, S. L., Wen, O., Williams, Z., Wilson, M. J., Winchell, J., Wykoff, K., Yellin, S., Young, B. A., Yu, T. C., Zatschler, B., Zatschler, S., Zaytsev, A., Zhang, E., Zheng, L., and Zuber, S.

Subjects
High Energy Physics - Experiment, Astrophysics - Cosmology and Nongalactic Astrophysics, Physics - Instrumentation and Detectors
Abstract

Recent experiments searching for sub-GeV/$c^2$ dark matter have observed event excesses close to their respective energy thresholds. Although specific to the individual technologies, the measured excess event rates have been consistently reported at or below event energies of a few-hundred eV, or with charges of a few electron-hole pairs. In the present work, we operated a 1-gram silicon SuperCDMS-HVeV detector at three voltages across the crystal (0 V, 60 V and 100 V). The 0 V data show an excess of events in the tens of eV region. Despite this event excess, we demonstrate the ability to set a competitive exclusion limit on the spin-independent dark matter--nucleon elastic scattering cross section for dark matter masses of $\mathcal{O}(100)$ MeV/$c^2$, enabled by operation of the detector at 0 V potential and achievement of a very low $\mathcal{O}(10)$ eV threshold for nuclear recoils. Comparing the data acquired at 0 V, 60 V and 100 V potentials across the crystal, we investigated possible sources of the unexpected events observed at low energy. The data indicate that the dominant contribution to the excess is consistent with a hypothesized luminescence from the printed circuit boards used in the detector holder.

Published
2022
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7. A Strategy for Low-Mass Dark Matter Searches with Cryogenic Detectors in the SuperCDMS SNOLAB Facility

Author

SuperCDMS Collaboration, Albakry, M. F., Alkhatib, I., Amaral, D. W. P., Aralis, T., Aramaki, T., Arnquist, I. J., Langroudy, I. Ataee, Azadbakht, E., Banik, S., Bathurst, C., Bauer, D. A., Bhattacharyya, R., Brink, P. L., Bunker, R., Cabrera, B., Calkins, R., Cameron, R. A., Cartaro, C., Cerdeno, D. G., Chang, Y. -Y., Chaudhuri, M., Chen, R., Chott, N., Cooley, J., Coombes, H., Corbett, J., Cushman, P., De Brienne, F., Dharani, S., di Vacri, M. L., Diamond, M. D., Fascione, E., Figueroa-Feliciano, E., Fink, C. W., Fouts, K., Fritts, M., Gerbier, G., Germond, R., Ghaith, M., Golwala, S. R., Hall, J., Hassan, N., Hines, B. A., Hollister, M. I., Hong, Z., Hoppe, E. W., Hsu, L., Huber, M. E., Iyer, V., Jastram, A., Kashyap, V. K. S., Kelsey, M. H., Kubik, A., Kurinsky, N. A., Lawrence, R. E., Lee, M., Li, A., Liu, J., Liu, Y., Loer, B., Lukens, P., MacFarlane, D. B., Mahapatra, R., Mandic, V., Mast, N., Mayer, A. J., Theenhausen, H. Meyer zu, Michaud, E., Michielin, E., Mirabolfathi, N., Mohanty, B., Nagorny, S., Nelson, J., Neog, H., Novati, V., Orrell, J. L., Osborne, M. D., Oser, S. M., Page, W. A., Partridge, R., Pedreros, D. S., Podviianiuk, R., Ponce, F., Poudel, S., Pradeep, A., Pyle, M., Rau, W., Reid, E., Ren, R., Reynolds, T., Roberts, A., Robinson, A. E., Saab, T., Sadoulet, B., Saikia, I., Sander, J., Sattari, A., Schmidt, B., Schnee, R. W., Scorza, S., Serfass, B., Poudel, S. S., Sincavage, D. J., Stanford, C., Street, J., Sun, H., Thasrawala, F. K., Toback, D., Underwood, R., Verma, S., Villano, A. N., von Krosigk, B., Watkins, S. L., Wen, O., Williams, Z., Wilson, M. J., Winchell, J., Wyko, K., Yellin, S., Young, B. A., Yu, T. C., Zatschler, B., Zatschler, S., Zaytsev, A., Zhang, E., Zheng, L., and Zuber, S.

Subjects
Physics - Instrumentation and Detectors, Astrophysics - Instrumentation and Methods for Astrophysics, High Energy Physics - Experiment, Nuclear Experiment
Abstract

The SuperCDMS Collaboration is currently building SuperCDMS SNOLAB, a dark matter search focused on nucleon-coupled dark matter in the 1-5 GeV/c$^2$ mass range. Looking to the future, the Collaboration has developed a set of experience-based upgrade scenarios, as well as novel directions, to extend the search for dark matter using the SuperCDMS technology in the SNOLAB facility. The experienced-based scenarios are forecasted to probe many square decades of unexplored dark matter parameter space below 5 GeV/c$^2$, covering over 6 decades in mass: 1-100 eV/c$^2$ for dark photons and axion-like particles, 1-100 MeV/c$^2$ for dark-photon-coupled light dark matter, and 0.05-5 GeV/c$^2$ for nucleon-coupled dark matter. They will reach the neutrino fog in the 0.5-5 GeV/c$^2$ mass range and test a variety of benchmark models and sharp targets. The novel directions involve greater departures from current SuperCDMS technology but promise even greater reach in the long run, and their development must begin now for them to be available in a timely fashion. The experienced-based upgrade scenarios rely mainly on dramatic improvements in detector performance based on demonstrated scaling laws and reasonable extrapolations of current performance. Importantly, these improvements in detector performance obviate significant reductions in background levels beyond current expectations for the SuperCDMS SNOLAB experiment. Given that the dominant limiting backgrounds for SuperCDMS SNOLAB are cosmogenically created radioisotopes in the detectors, likely amenable only to isotopic purification and an underground detector life-cycle from before crystal growth to detector testing, the potential cost and time savings are enormous and the necessary improvements much easier to prototype., Comment: contribution to Snowmass 2021; v2 updated (assorted corrections and improvements to forecasts) October 2022; v3 updated (corrected SuperCDMS SNOLAB sensitivity curves in upgrade forecast plots in body of text) April 2023

Published
2022

8. Ionization yield measurement in a germanium CDMSlite detector using photo-neutron sources

Author

SuperCDMS Collaboration, Albakry, M. F., Alkhatib, I., Amaral, D. W. P., Aralis, T., Aramaki, T., Arnquist, I. J., Langroudy, I. Ataee, Azadbakht, E., Banik, S., Bathurst, C., Bauer, D. A., Bezerra, L. V. S., Bhattacharyya, R., Bowles, M. A., Brink, P. L., Bunker, R., Cabrera, B., Calkins, R., Cameron, R. A., Cartaro, C., Cerdeño, D. G., Chang, Y. -Y., Chaudhuri, M., Chen, R., Chott, N., Cooley, J., Coombes, H., Corbett, J., Cushman, P., De Brienne, F., di Vacri, M. L., Diamond, M. D., Fascione, E., Figueroa-Feliciano, E., Fink, C. W., Fouts, K., Fritts, M., Gerbier, G., Germond, R., Ghaith, M., Golwala, S. R., Hall, J., Hines, B. A., Hollister, M. I., Hong, Z., Hoppe, E. W., Hsu, L., Huber, M. E., Iyer, V., Jastram, A., Kashyap, V. K. S., Kelsey, M. H., Kubik, A., Kurinsky, N. A., Lawrence, R. E., Lee, M., Li, A., Liu, J., Liu, Y., Loer, B., Lukens, P., MacDonell, D., MacFarlane, D. B., Mahapatra, R., Mandic, V., Mast, N., Mayer, A. J., Theenhausen, H. Meyer zu, Michaud, É., Michielin, E., Mirabolfathi, N., Mohanty, B., Mendoza, J. D. Morales, Nagorny, S., Nelson, J., Neog, H., Novati, V., Orrell, J. L., Osborne, M. D., Oser, S. M., Page, W. A., Partridge, R., Pedreros, D. S., Podviianiuk, R., Ponce, F., Poudel, S., Pradeep, A., Pyle, M., Rau, W., Reid, E., Ren, R., Reynolds, T., Roberts, A., Robinson, A. E., Saab, T., Sadoulet, B., Saikia, I., Sander, J., Sattari, A., Scarff, A., Schmidt, B., Schnee, R. W., Scorza, S., Serfass, B., Sincavage, D. J., Stanford, C., Street, J., Thasrawala, F. K., Toback, D., Underwood, R., Verma, S., Villano, A. N., von Krosigk, B., Watkins, S. L., Wen, O., Williams, Z., Wilson, M. J., Winchell, J., Wykoff, K., Yellin, S., Young, B. A., Yu, T. C., Zatschler, B., Zatschler, S., Zaytsev, A., Zhang, E., Zheng, L., and Zuber, S.

Subjects
Physics - Instrumentation and Detectors
Abstract

Two photo-neutron sources, $^{88}$Y$^{9}$Be and $^{124}$Sb$^{9}$Be, have been used to investigate the ionization yield of nuclear recoils in the CDMSlite germanium detectors by the SuperCDMS collaboration. This work evaluates the yield for nuclear recoil energies between 1 keV and 7 keV at a temperature of $\sim$ 50 mK. We use a Geant4 simulation to model the neutron spectrum assuming a charge yield model that is a generalization of the standard Lindhard model and consists of two energy dependent parameters. We perform a likelihood analysis using the simulated neutron spectrum, modeled background, and experimental data to obtain the best fit values of the yield model. The ionization yield between recoil energies of 1 keV and 7 keV is shown to be significantly lower than predicted by the standard Lindhard model for germanium. There is a general lack of agreement among different experiments using a variety of techniques studying the low-energy range of the nuclear recoil yield, which is most critical for interpretation of direct dark matter searches. This suggests complexity in the physical process that many direct detection experiments use to model their primary signal detection mechanism and highlights the need for further studies to clarify underlying systematic effects that have not been well understood up to this point.

Published
2022
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9. Constraints on Lightly Ionizing Particles from CDMSlite

Author

SuperCDMS Collaboration, Alkhatib, I., Amaral, D. W. P., Aralis, T., Aramaki, T., Arnquist, I. J., Langroudy, I. Ataee, Azadbakht, E., Banik, S., Barker, D., Bathurst, C., Bauer, D. A., Bezerra, L. V. S., Bhattacharyya, R., Bowles, M. A., Brink, P. L., Bunker, R., Cabrera, B., Calkins, R., Cameron, R. A., Cartaro, C., Cerdeño, D. G., Chang, Y. -Y., Chaudhuri, M., Chen, R., Chott, N., Cooley, J., Coombes, H., Corbett, J., Cushman, P., De Brienne, F., di Vacri, M. L., Diamond, M. D., Fascione, E., Figueroa-Feliciano, E., Fink, C. W., Fouts, K., Fritts, M., Gerbier, G., Germond, R., Ghaith, M., Golwala, S. R., Harris, H. R., Hines, B. A., Hollister, M. I., Hong, Z., Hoppe, E. W., Hsu, L., Huber, M. E., Iyer, V., Jardin, D., Jastram, A., Kashyap, V. K. S., Kelsey, M. H., Kubik, A., Kurinsky, N. A., Lawrence, R. E., Li, A., Loer, B., Asamar, E. Lopez, Lukens, P., MacFarlane, D. B., Mahapatra, R., Mandic, V., Mast, N., Mayer, A. J., Theenhausen, H. Meyer zu, Michaud, É. M., Michielin, E., Mirabolfathi, N., Mohanty, B., Mendoza, J. D. Morales, Nagorny, S., Nelson, J., Neog, H., Novati, V., Orrell, J. L., Oser, S. M., Page, W. A., Partridge, R., Podviianiuk, R., Ponce, F., Poudel, S., Pradeep, A., Pyle, M., Rau, W., Reid, E., Ren, R., Reynolds, T., Roberts, A., Robinson, A. E., Saab, T., Sadoulet, B., Sander, J., Sattari, A., Schnee, R. W., Scorza, S., Serfass, B., Sincavage, D. J., Stanford, C., Street, J., Toback, D., Underwood, R., Verma, S., Villano, A. N., von Krosigk, B., Watkins, S. L., Wilson, J. S., Wilson, M. J., Winchell, J., Wright, D. H., Yellin, S., Young, B. A., Yu, T. C., Zhang, E., Zhang, H. G., Zhao, X., and Zheng, L.

Subjects
High Energy Physics - Experiment, Astrophysics - Cosmology and Nongalactic Astrophysics, Astrophysics - High Energy Astrophysical Phenomena, High Energy Physics - Phenomenology, Physics - Instrumentation and Detectors
Abstract

The Cryogenic Dark Matter Search low ionization threshold experiment (CDMSlite) achieved efficient detection of very small recoil energies in its germanium target, resulting in sensitivity to Lightly Ionizing Particles (LIPs) in a previously unexplored region of charge, mass, and velocity parameter space. We report first direct-detection limits calculated using the optimum interval method on the vertical intensity of cosmogenically-produced LIPs with an electric charge smaller than $e/(3\times10^5$), as well as the strongest limits for charge $\leq e/160$, with a minimum vertical intensity of $1.36\times10^{-7}$\,cm$^{-2}$s$^{-1}$sr$^{-1}$ at charge $e/160$. These results apply over a wide range of LIP masses (5\,MeV/$c^2$ to 100\,TeV/$c^2$) and cover a wide range of $\beta\gamma$ values (0.1 -- $10^6$), thus excluding non-relativistic LIPs with $\beta\gamma$ as small as 0.1 for the first time.

Published
2020
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10. Performance of a Large Area Photon Detector For Rare Event Search Applications

Author

CPD Collaboration, Fink, C. W., Watkins, S. L., Aramaki, T., Brink, P. L., Camilleri, J., Defay, X., Ganjam, S., Kolomensky, Yu. G., Mahapatra, R., Mirabolfathi, N., Page, W. A., Partridge, R., Platt, M., Pyle, M., Sadoulet, B., Serfass, B., and Zuber, S.

Subjects
Physics - Instrumentation and Detectors, High Energy Physics - Experiment
Abstract

We present the design and characterization of a large-area Cryogenic PhotoDetector (CPD) designed for active particle identification in rare event searches, such as neutrinoless double beta decay and dark matter experiments. The detector consists of a $45.6$ $\mathrm{cm}^2$ surface area by 1-mm-thick $10.6$ $\mathrm{g}$ Si wafer. It is instrumented with a distributed network of Quasiparticle-trap-assisted Electrothermal feedback Transition-edge sensors (QETs) with superconducting critical temperature $T_c=41.5$ $\mathrm{mK}$ to measure athermal phonons released from interactions with photons. The detector is characterized and calibrated with a collimated $^{55}$Fe X-ray source incident on the center of the detector. The noise equivalent power is measured to be $1\times 10^{-17}$ $\mathrm{W}/\sqrt{\mathrm{Hz}}$ in a bandwidth of $2.7$ $\mathrm{kHz}$. The baseline energy resolution is measured to be $\sigma_E = 3.86 \pm 0.04$ $(\mathrm{stat.})^{+0.23}_{-0.00}$ $(\mathrm{syst.})$ $\mathrm{eV}$ (RMS). The detector also has an expected timing resolution of $\sigma_t = 2.3$ $\mu\mathrm{s}$ for $5$ $\sigma_E$ events., Comment: 6 pages, 5 figures

Published
2020
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11. Light Dark Matter Search with a High-Resolution Athermal Phonon Detector Operated Above Ground

Author

Alkhatib, I., Amaral, D. W. P., Aralis, T., Aramaki, T., Arnquist, I. J., Langroudy, I. Ataee, Azadbakht, E., Banik, S., Barker, D., Bathurst, C., Bauer, D. A., Bezerra, L. V. S., Bhattacharyya, R., Binder, T., Bowles, M. A., Brink, P. L., Bunker, R., Cabrera, B., Calkins, R., Cameron, R. A., Cartaro, C., Cerdeño, D. G., Chang, Y. -Y., Chaudhuri, M., Chen, R., Chott, N., Cooley, J., Coombes, H., Corbett, J., Cushman, P., De Brienne, F., di Vacri, M. L., Diamond, M. D., Fascione, E., Figueroa-Feliciano, E., Fink, C. W., Fouts, K., Fritts, M., Gerbier, G., Germond, R., Ghaith, M., Golwala, S. R., Harris, H. R., Herbert, N., Hines, B. A., Hollister, M. I., Hong, Z., Hoppe, E. W., Hsu, L., Huber, M. E., Iyer, V., Jardin, D., Jastram, A., Kashyap, V. K. S., Kelsey, M. H., Kubik, A., Kurinsky, N. A., Lawrence, R. E., Li, A., Loer, B., Asamar, E. Lopez, Lukens, P., MacDonell, D., MacFarlane, D. B., Mahapatra, R., Mandic, V., Mast, N., Mayer, A. J., Theenhausen, H. Meyer zu, Michaud, É. M., Michielin, E., Mirabolfathi, N., Mohanty, B., Mendoza, J. D. Morales, Nagorny, S., Nelson, J., Neog, H., Novati, V., Orrell, J. L., Oser, S. M., Page, W. A., Pakarha, P., Partridge, R., Podviianiuk, R., Ponce, F., Poudel, S., Pyle, M., Rau, W., Reid, E., Ren, R., Reynolds, T., Roberts, A., Robinson, A. E., Saab, T., Sadoulet, B., Sander, J., Sattari, A., Schnee, R. W., Scorza, S., Serfass, B., Sincavage, D. J., Stanford, C., Street, J., Toback, D., Underwood, R., Verma, S., Villano, A. N., von Krosigk, B., Watkins, S. L., Wills, L., Wilson, J. S., Wilson, M. J., Winchell, J., Wright, D. H., Yellin, S., Young, B. A., Yu, T. C., Zhang, E., Zhang, H. G., Zhao, X., Zheng, L., Camilleri, J., Kolomensky, Yu. G., and Zuber, S.

Subjects
High Energy Physics - Experiment, Astrophysics - Cosmology and Nongalactic Astrophysics, Physics - Instrumentation and Detectors
Abstract

We present limits on spin-independent dark matter-nucleon interactions using a $10.6$ $\mathrm{g}$ Si athermal phonon detector with a baseline energy resolution of $\sigma_E=3.86 \pm 0.04$ $(\mathrm{stat.})^{+0.19}_{-0.00}$ $(\mathrm{syst.})$ $\mathrm{eV}$. This exclusion analysis sets the most stringent dark matter-nucleon scattering cross-section limits achieved by a cryogenic detector for dark matter particle masses from $93$ to $140$ $\mathrm{MeV}/c^2$, with a raw exposure of $9.9$ $\mathrm{g}\cdot\mathrm{d}$ acquired at an above-ground facility. This work illustrates the scientific potential of detectors with athermal phonon sensors with eV-scale energy resolution for future dark matter searches., Comment: 7 pages, 4 figures, this version includes ancillary files from official data release

Published
2020
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12. Constraints on low-mass, relic dark matter candidates from a surface-operated SuperCDMS single-charge sensitive detector

Author

SuperCDMS Collaboration, Amaral, D. W., Aralis, T., Aramaki, T., Arnquist, I. J., Azadbakht, E., Banik, S., Barker, D., Bathurst, C., Bauer, D. A., Bezerra, L. V. S., Bhattacharyya, R., Binder, T., Bowles, M. A., Brink, P. L., Bunker, R., Cabrera, B., Calkins, R., Cameron, R. A., Cartaro, C., Cerdeño, D. G., Chang, Y. -Y., Chen, R., Chott, N., Cooley, J., Coombes, H., Corbett, J., Cushman, P., De Brienne, F., di Vacri, M. L., Diamond, M. D., Fascione, E., Figueroa-Feliciano, E., Fink, C. W., Fouts, K., Fritts, M., Gerbier, G., Germond, R., Ghaith, M., Golwala, S. R., Harris, H. R., Herbert, N., Hines, B. A., Hollister, M. I., Hong, Z., Hoppe, E. W., Hsu, L., Huber, M. E., Iyer, V., Jardin, D., Jastram, A., Kelsey, M. H., Kubik, A., Kurinsky, N. A., Lawrence, R. E., Li, A., Loer, B., Asamar, E. Lopez, Lukens, P., MacDonell, D., MacFarlane, D. B., Mahapatra, R., Mandic, V., Mast, N., Mayer, A. J., Michaud, É. M., Michielin, E., Mirabolfathi, N., Mohanty, B., Mendoza, J. D. Morales, Nagorny, S., Nelson, J., Neog, H., Novati, V., Orrell, J. L., Oser, S. M., Page, W. A., Pakarha, P., Partridge, R., Podviianiuk, R., Ponce, F., Poudel, S., Pyle, M., Rau, W., Reid, E., Ren, R., Reynolds, T., Roberts, A., Robinson, A. E., Rogers, H. E., Saab, T., Sadoulet, B., Sander, J., Sattari, A., Schnee, R. W., Scorza, S., Serfass, B., Sincavage, D. J., Stanford, C., Stein, M., Street, J., Toback, D., Underwood, R., Verma, S., Villano, A. N., von Krosigk, B., Watkins, S. L., Wills, L., Wilson, J. S., Wilson, M. J., Winchell, J., Wright, D. H., Yellin, S., Young, B. A., Yu, T. C., Zhang, E., Zhang, H. G., Zhao, X., and Zheng, L.

Subjects
High Energy Physics - Experiment, Astrophysics - Cosmology and Nongalactic Astrophysics, Physics - Instrumentation and Detectors
Abstract

This article presents an analysis and the resulting limits on light dark matter inelastically scattering off of electrons, and on dark photon and axion-like particle absorption, using a second-generation SuperCDMS high-voltage eV-resolution detector. The 0.93 gram Si detector achieved a 3 eV phonon energy resolution; for a detector bias of 100 V, this corresponds to a charge resolution of 3% of a single electron-hole pair. The energy spectrum is reported from a blind analysis with 1.2 gram-days of exposure acquired in an above-ground laboratory. With charge carrier trapping and impact ionization effects incorporated into the dark matter signal models, the dark matter-electron cross section $\bar{\sigma}_{e}$ is constrained for dark matter masses from 0.5--$10^{4} $MeV$/c^{2}$; in the mass range from 1.2--50 eV$/c^{2}$ the dark photon kinetic mixing parameter $\varepsilon$ and the axioelectric coupling constant $g_{ae}$ are constrained. The minimum 90% confidence-level upper limits within the above mentioned mass ranges are $\bar{\sigma}_{e}\,=\,8.7\times10^{-34}$ cm$^{2}$, $\varepsilon\,=\,3.3\times10^{-14}$, and $g_{ae}\,=\,1.0\times10^{-9}$., Comment: 5 pages + title and references, 3 figures and 1 table

Published
2020
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13. Characterizing TES Power Noise for Future Single Optical-Phonon and Infrared-Photon Detectors

Author

Fink, C. W., Watkins, S. L., Aramaki, T., Brink, P. L., Ganjam, S., Hines, B. A., Huber, M. E., Kurinsky, N. A., Mahapatra, R., Mirabolfathi, N., Page, W. A., Partridge, R., Platt, M., Pyle, M., Sadoulet, B., Serfass, B., and Zuber, S.

Subjects
Physics - Instrumentation and Detectors
Abstract

In this letter, we present the performance of a $100~\mu\mathrm{m}\times 400~\mu\mathrm{m} \times 40~\mathrm{nm}$ tungsten (W) Transition-Edge Sensor (TES) with a critical temperature of 40 mK. This device has a measured noise equivalent power (NEP) of $1.5\times 10^{-18}\ \mathrm{W}/\sqrt{\mathrm{Hz}}$, in a bandwidth of $2.6$ kHz, indicating a resolution for Dirac delta energy depositions of $40\pm 5~\mathrm{meV}$ (rms). The performance demonstrated by this device is a critical step towards developing a $\mathcal{O}(100)~\mathrm{meV}$ threshold athermal phonon detectors for low-mass dark matter searches., Comment: 5 pages, 6 figures. Accepted for publication at AIP Advances

Published
2020
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14. Constraints on Lightly Ionizing Particles from CDMSlite

Author

Alkhatib, I, Amaral, DWP, Aralis, T, Aramaki, T, Arnquist, IJ, Langroudy, I Ataee, Azadbakht, E, Banik, S, Barker, D, Bathurst, C, Bauer, DA, Bezerra, LVS, Bhattacharyya, R, Bowles, MA, Brink, PL, Bunker, R, Cabrera, B, Calkins, R, Cameron, RA, Cartaro, C, Cerdeño, DG, Chang, Y-Y, Chaudhuri, M, Chen, R, Chott, N, Cooley, J, Coombes, H, Corbett, J, Cushman, P, De Brienne, F, di Vacri, ML, Diamond, MD, Fascione, E, Figueroa-Feliciano, E, Fink, CW, Fouts, K, Fritts, M, Gerbier, G, Germond, R, Ghaith, M, Golwala, SR, Harris, HR, Hines, BA, Hollister, MI, Hong, Z, Hoppe, EW, Hsu, L, Huber, ME, Iyer, V, Jardin, D, Jastram, A, Kashyap, VKS, Kelsey, MH, Kubik, A, Kurinsky, NA, Lawrence, RE, Li, A, Loer, B, Asamar, E Lopez, Lukens, P, MacFarlane, DB, Mahapatra, R, Mandic, V, Mast, N, Mayer, AJ, Theenhausen, H Meyer zu, Michaud, ÉM, Michielin, E, Mirabolfathi, N, Mohanty, B, Mendoza, JD Morales, Nagorny, S, Nelson, J, Neog, H, Novati, V, Orrell, JL, Oser, SM, Page, WA, Partridge, R, Podviianiuk, R, Ponce, F, Poudel, S, Pradeep, A, Pyle, M, Rau, W, Reid, E, Ren, R, Reynolds, T, Roberts, A, Robinson, AE, Saab, T, Sadoulet, B, Sander, J, Sattari, A, Schnee, RW, Scorza, S, Serfass, B, Sincavage, DJ, Stanford, C, and Street, J

Subjects
SuperCDMS Collaboration, Mathematical Sciences, Physical Sciences, Engineering, General Physics
Abstract

The Cryogenic Dark Matter Search low ionization threshold experiment (CDMSlite) achieved efficient detection of very small recoil energies in its germanium target, resulting in sensitivity to lightly ionizing particles (LIPs) in a previously unexplored region of charge, mass, and velocity parameter space. We report first direct-detection limits calculated using the optimum interval method on the vertical intensity of cosmogenically produced LIPs with an electric charge smaller than e/(3×10^{5}), as well as the strongest limits for charge ≤e/160, with a minimum vertical intensity of 1.36×10^{-7}  cm^{-2} s^{-1} sr^{-1} at charge e/160. These results apply over a wide range of LIP masses (5  MeV/c^{2} to 100  TeV/c^{2}) and cover a wide range of βγ values (0.1-10^{6}), thus excluding nonrelativistic LIPs with βγ as small as 0.1 for the first time.

Published
2021

15. Light Dark Matter Search with a High-Resolution Athermal Phonon Detector Operated above Ground

Author

Alkhatib, I, Amaral, DWP, Aralis, T, Aramaki, T, Arnquist, IJ, Langroudy, I Ataee, Azadbakht, E, Banik, S, Barker, D, Bathurst, C, Bauer, DA, Bezerra, LVS, Bhattacharyya, R, Binder, T, Bowles, MA, Brink, PL, Bunker, R, Cabrera, B, Calkins, R, Cameron, RA, Cartaro, C, Cerdeño, DG, Chang, Y-Y, Chaudhuri, M, Chen, R, Chott, N, Cooley, J, Coombes, H, Corbett, J, Cushman, P, De Brienne, F, di Vacri, ML, Diamond, MD, Fascione, E, Figueroa-Feliciano, E, Fink, CW, Fouts, K, Fritts, M, Gerbier, G, Germond, R, Ghaith, M, Golwala, SR, Harris, HR, Herbert, N, Hines, BA, Hollister, MI, Hong, Z, Hoppe, EW, Hsu, L, Huber, ME, Iyer, V, Jardin, D, Jastram, A, Kashyap, VKS, Kelsey, MH, Kubik, A, Kurinsky, NA, Lawrence, RE, Li, A, Loer, B, Asamar, E Lopez, Lukens, P, MacDonell, D, MacFarlane, DB, Mahapatra, R, Mandic, V, Mast, N, Mayer, AJ, Theenhausen, H Meyer zu, Michaud, ÉM, Michielin, E, Mirabolfathi, N, Mohanty, B, Mendoza, JD Morales, Nagorny, S, Nelson, J, Neog, H, Novati, V, Orrell, JL, Oser, SM, Page, WA, Pakarha, P, Partridge, R, Podviianiuk, R, Ponce, F, Poudel, S, Pyle, M, Rau, W, Reid, E, Ren, R, Reynolds, T, Roberts, A, Robinson, AE, Saab, T, Sadoulet, B, Sander, J, Sattari, A, Schnee, RW, Scorza, S, and Serfass, B

Subjects
Nuclear and Plasma Physics, Particle and High Energy Physics, Physical Sciences, SuperCDMS Collaboration, Mathematical Sciences, Engineering, General Physics, Mathematical sciences, Physical sciences
Abstract

We present limits on spin-independent dark matter-nucleon interactions using a 10.6 g Si athermal phonon detector with a baseline energy resolution of σ_{E}=3.86±0.04(stat)_{-0.00}^{+0.19}(syst)  eV. This exclusion analysis sets the most stringent dark matter-nucleon scattering cross-section limits achieved by a cryogenic detector for dark matter particle masses from 93 to 140  MeV/c^{2}, with a raw exposure of 9.9 g d acquired at an above-ground facility. This work illustrates the scientific potential of detectors with athermal phonon sensors with eV-scale energy resolution for future dark matter searches.

Published
2021

16. Modeling of Impact Ionization and Charge Trapping in SuperCDMS HVeV Detectors

Author

Ponce, F., Page, W., Brink, P. L., Cabrera, B., Cherry, M., Fink, C., Kurinsky, N., Partridge, R., Pyle, M., Sadoulet, B., Serfass, B., Stanford, C., Watkins, S. L., Yellin, S., and Young, B. A.

Subjects
Physics - Instrumentation and Detectors
Abstract

A model for charge trapping and impact ionization, and an experiment to measure these parameters is presented for the SuperCDMS HVeV detector. A procedure to isolate and quantify the main sources of noise (bulk and surface charge leakage) in the measurements is also describe. This sets the stage to precisely measure the charge trapping and impact ionization probabilities in order to incorporate this model into future dark matter searches.

Published
2019
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17. Measuring the Impact Ionization and Charge Trapping Probabilities in SuperCDMS HVeV Phonon Sensing Detectors

Author

Ponce, F., Page, W., Brink, P. L., Cabrera, B., Cherry, M., Fink, C., Kurinsky, N., Partridge, R., Pyle, M., Sadoulet, B., Serfass, B., Stanford, C., Watkins, S. L., Yellin, S., and Young, B. A.

Subjects
Physics - Instrumentation and Detectors
Abstract

A 0.93 gram $1{\times}1{\times}0.4$ cm$^3$ SuperCDMS silicon HVeV detector operated at 30 mK was illuminated by 1.91 eV photons using a room temperature pulsed laser coupled to the cryostat via fiber optic. The detector's response under a variety of specific operating conditions was used to study the detector leakage current, charge trapping and impact ionization in the high-purity Si substrate. The measured probabilities for a charge carrier in the detector to undergo charge trapping (0.713 $\pm$ 0.093%) or cause impact ionization (1.576 $\pm$ 0.110%) were found to be nearly independent of bias polarity and charge-carrier type (electron or hole) for substrate biases of $\pm$ 140 V., Comment: 4 pages, 4 figures

Published
2019
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18. Constraints on dark photons and axionlike particles from the SuperCDMS Soudan experiment

Author

Aralis, T, Aramaki, T, Arnquist, IJ, Azadbakht, E, Baker, W, Banik, S, Barker, D, Bathurst, C, Bauer, DA, Bezerra, LVS, Bhattacharyya, R, Binder, T, Bowles, MA, Brink, PL, Bunker, R, Cabrera, B, Calkins, R, Cameron, RA, Cartaro, C, Cerdeño, DG, Chang, Y-Y, Cooley, J, Coombes, H, Corbett, J, Cornell, B, Cushman, P, De Brienne, F, di Vacri, ML, Diamond, MD, Fascione, E, Figueroa-Feliciano, E, Fink, CW, Fouts, K, Fritts, M, Gerbier, G, Germond, R, Ghaith, M, Golwala, SR, Harris, HR, Herbert, N, Hines, BA, Hollister, MI, Hong, Z, Hoppe, EW, Hsu, L, Huber, ME, Iyer, V, Jardin, D, Jastram, A, Kelsey, MH, Kennedy, A, Kubik, A, Kurinsky, NA, Lawrence, RE, Li, A, Loer, B, Asamar, E Lopez, Lukens, P, MacDonell, D, MacFarlane, DB, Mahapatra, R, Mandic, V, Mast, N, Michaud, ÉM, Michielin, E, Mirabolfathi, N, Mohanty, B, Mendoza, JD Morales, Nagorny, S, Nelson, J, Neog, H, Orrell, JL, Oser, SM, Page, WA, Pakarha, P, Partridge, R, Podviianiuk, R, Ponce, F, Poudel, S, Pyle, M, Rau, W, Ren, R, Reynolds, T, Roberts, A, Robinson, AE, Rogers, HE, Saab, T, Sadoulet, B, Sander, J, Schnee, RW, Scorza, S, Senapati, K, Serfass, B, Sincavage, DJ, Stanford, C, Stein, M, Street, J, Toback, D, Underwood, R, and Verma, S

Subjects
hep-ex, physics.ins-det, Astronomical and Space Sciences, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Quantum Physics, Nuclear & Particles Physics
Abstract

We present an analysis of electron recoils in cryogenic germanium detectors operated during the SuperCDMS Soudan experiment. The data are used to set new constraints on the axioelectric coupling of axionlike particles and the kinetic mixing parameter of dark photons, assuming the respective species constitutes all of the galactic dark matter. This study covers the mass range from 40 eV/c2 to 500 keV/c2 for both candidates, excluding previously untested parameter space for masses below ∼1 keV/c2. For the kinetic mixing of dark photons, values below 10-15 are reached for particle masses around 100 eV/c2; for the axioelectric coupling of axionlike particles, values below 10-12 are reached for particles with masses in the range of a few-hundred eV/c2.

Published
2020

19. Search for Low-Mass Dark Matter with CDMSlite Using a Profile Likelihood Fit

Author

SuperCDMS Collaboration, Agnese, R., Aralis, T., Aramaki, T., Arnquist, I. J., Azadbakht, E., Baker, W., Banik, S., Barker, D., Bauer, D. A., Binder, T., Bowles, M. A., Brink, P. L., Bunker, R., Cabrera, B., Calkins, R., Cameron, R. A., Cartaro, C., Cerdeño, D. G., Chang, Y. -Y., Cooley, J., Cornell, B., Cushman, P., De Brienne, F., Doughty, T., Fascione, E., Figueroa-Feliciano, E., Fink, C. W., Fritts, M., Gerbier, G., Germond, R., Ghaith, M., Golwala, S. R., Harris, H. R., Herbert, N., Hong, Z., Hoppe, E. W., Hsu, L., Huber, M. E., Iyer, V., Jardin, D., Jastram, A., Jena, C., Kelsey, M. H., Kennedy, A., Kubik, A., Kurinsky, N. A., Lawrence, R. E., Loer, B., Asamar, E. Lopez, Lukens, P., MacDonell, D., Mahapatra, R., Mandic, V., Mast, N., Miller, E., Mirabolfathi, N., Mohanty, B., Mendoza, J. D. Morales, Nelson, J., Neog, H., Orrell, J. L., Oser, S. M., Page, W. A., Partridge, R., Pepin, M., Ponce, F., Poudel, S., Pyle, M., Qiu, H., Rau, W., Reisetter, A., Ren, R., Reynolds, T., Roberts, A., Robinson, A. E., Rogers, H. E., Saab, T., Sadoulet, B., Sander, J., Scarff, A., Schnee, R. W., Scorza, S., Senapati, K., Serfass, B., Speller, D., Stanford, C., Stein, M., Street, J., Tanaka, H. A., Toback, D., Underwood, R., Villano, A. N., von Krosigk, B., Watkins, S. L., Wilson, J. S., Wilson, M. J., Winchell, J., Wright, D. H., Yellin, S., Young, B. A., Zhang, X., and Zhao, X.

Subjects
Astrophysics - Cosmology and Nongalactic Astrophysics, Physics - Instrumentation and Detectors
Abstract

The Cryogenic Dark Matter Search low ionization threshold experiment (CDMSlite) searches for interactions between dark matter particles and germanium nuclei in cryogenic detectors. The experiment has achieved a low energy threshold with improved sensitivity to low-mass (<10 GeV/c$^2$) dark matter particles. We present an analysis of the final CDMSlite data set, taken with a different detector than was used for the two previous CDMSlite data sets. This analysis includes a data "salting" method to protect against bias, improved noise discrimination, background modeling, and the use of profile likelihood methods to search for a dark matter signal in the presence of backgrounds. We achieve an energy threshold of 70 eV and significantly improve the sensitivity for dark matter particles with masses between 2.5 and 10 GeV/c$^2$ compared to previous analyses. We set an upper limit on the dark matter-nucleon scattering cross section in germanium of 5.4$\times$10$^{-42}$ cm$^2$ at 5 GeV/c$^2$, a factor of $\sim$2.5 improvement over the previous CDMSlite result.

Published
2018
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20. Production Rate Measurement of Tritium and Other Cosmogenic Isotopes in Germanium with CDMSlite

Author

SuperCDMS Collaboration, Agnese, R., Aralis, T., Aramaki, T., Arnquist, I. J., Azadbakht, E., Baker, W., Barker, D., Bauer, D. A., Binder, T., Bowles, M. A., Brink, P. L., Bunker, R., Cabrera, B., Calkins, R., Cartaro, C., Cerdeño, D. G., Chang, Y. -Y., Cooley, J., Cornell, B., Cushman, P., Doughty, T., Fascione, E., Figueroa-Feliciano, E., Fink, C. W., Fritts, M., Gerbier, G., Germond, R., Ghaith, M., Golwal, S. R., Harris, H. R., Hong, Z., Hoppe, E. W., Hsu, L., Huber, M. E., Iyer, V., Jardin, D., Jastram, A., Jena, C., Kelsey, M. H., Kennedy, A., Kubik, A., Kurinsky, N. A., Lawrence, R. E., Loer, B., Asamar, E. Lopez, Lukens, P., MacDonell, D., Mahapatra, R., Mandic, V., Mast, N., Miller, E., Mirabolfathi, N., Mohanty, B., Mendoza, J. D. Morales, Nelson, J., Orrell, J. L., Oser, S. M., Page, W. A., Partridge, R., Pepin, M., Ponce, F., Poudel, S., Pyle, M., Qiu, H., Rau, W., Reisetter, A., Ren, R., Reynolds, T., Roberts, A., Robinson, A. E., Rogers, H. E., Saab, T., Sadoulet, B., Banik, S., Sander, J., Scarff, A., Schnee, R. W., Scorza, S., Senapati, K., Serfass, B., Speller, D., Stein, M., Street, J., Tanaka, H. A., Toback, D., Underwood, R., Villano, A. N., von Krosigk, B., Watkins, S. L., Wilson, J. S., Wilson, M. J., Winchell, J., Wright, D. H., Yellin, S., Young, B. A., Zhang, X., and Zhao, X.

Subjects
Physics - Instrumentation and Detectors, Astrophysics - Cosmology and Nongalactic Astrophysics, Astrophysics - Instrumentation and Methods for Astrophysics, High Energy Physics - Experiment, Nuclear Experiment
Abstract

Future direct searches for low-mass dark matter particles with germanium detectors, such as SuperCDMS SNOLAB, are expected to be limited by backgrounds from radioactive isotopes activated by cosmogenic radiation inside the germanium. There are limited experimental data available to constrain production rates and a large spread of theoretical predictions. We examine the calculation of expected production rates, and analyze data from the second run of the CDMS low ionization threshold experiment (CDMSlite) to estimate the rates for several isotopes. We model the measured CDMSlite spectrum and fit for contributions from tritium and other isotopes. Using the knowledge of the detector history, these results are converted to cosmogenic production rates at sea level. The production rates in atoms/(kg$\cdot$day) are 74$\pm$9 for $^3$H, 1.5$\pm$0.7 for $^{55}$Fe, 17$\pm$5 for $^{65}$Zn, and 30$\pm$18 for $^{68}$Ge., Comment: 14 pages, 10 figures, 5 tables. v5 contains the extended data release (and documentation) of the CDMSlite Run 2 data as ancillary files

Published
2018
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21. First Dark Matter Constraints from a SuperCDMS Single-Charge Sensitive Detector

Author

SuperCDMS Collaboration, Agnese, R., Aralis, T., Aramaki, T., Arnquist, I. J., Azadbakht, E., Baker, W., Banik, S., Barker, D., Bauer, D. A., Binder, T., Bowles, M. A., Brink, P. L., Bunker, R., Cabrera, B., Calkins, R., Cartaro, C., Cerdeno, D. G., Chang, Y. -Y., Cooley, J., Cornell, B., Cushman, P., Di Stefano, P. C. F., Doughty, T., Fascione, E., Figueroa-Feliciano, E., Fink, C., Fritts, M., Gerbier, G., Germond, R., Ghaith, M., Golwala, S. R., Harris, H. R., Hong, Z., Hoppe, E. W., Hsu, L., Huber, M. E., Iyer, V., Jardin, D., Jena, C., Kelsey, M. H., Kennedy, A., Kubik, A., Kurinsky, N. A., Lawrence, R. E., Leyva, J. V., Loer, B., Asamar, E. Lopez, Lukens, P., MacDonell, D., Mahapatra, R., Mandic, V., Mast, N., Miller, E. H., Mirabolfathi, N., Mohanty, B., Mendoza, J. D. Morales, Nelson, J., Orrell, J. L., Oser, S. M., Page, W. A., Partridge, R., Pepin, M., Phipps, A., Ponce, F., Poudel, S., Pyle, M., Qiu, H., Rau, W., Reisetter, A., Reynolds, T., Roberts, A., Robinson, A. E., Rogers, H. E., Romani, R. K., Saab, T., Sadoulet, B., Sander, J., Scarff, A., Schnee, R. W., Scorza, S., Senapati, K., Serfass, B., So, J., Speller, D., Stanford, C., Stein, M., Street, J., Tanaka, H. A., Toback, D., Underwood, R., Villano, A. N., von Krosigk, B., Watkins, S. L., Wilson, J. S., Wilson, M. J., Winchell, J., Wright, D. H., Yellin, S., Young, B. A., Zhang, X., and Zhao, X.

Subjects
High Energy Physics - Experiment, Astrophysics - Cosmology and Nongalactic Astrophysics, Physics - Instrumentation and Detectors
Abstract

We present the first limits on inelastic electron-scattering dark matter and dark photon absorption using a prototype SuperCDMS detector having a charge resolution of 0.1 electron-hole pairs (CDMS HVeV, a 0.93 gram CDMS HV device). These electron-recoil limits significantly improve experimental constraints on dark matter particles with masses as low as 1 MeV/$\mathrm{c^2}$. We demonstrate a sensitivity to dark photons competitive with other leading approaches but using substantially less exposure (0.49 gram days). These results demonstrate the scientific potential of phonon-mediated semiconductor detectors that are sensitive to single electronic excitations., Comment: 6 pages + title and references, 6 figures, includes erratum submitted to PRL and data release

Published
2018
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22. Nuclear-recoil energy scale in CDMS II silicon dark-matter detectors

Author

Agnese, R., Anderson, A. J., Aramaki, T., Baker, W., Balakishiyeva, D., Banik, S., Barker, D., Thakur, R. Basu, Bauer, D. A., Binder, T., Borgland, A., Bowles, M. A., Brink, P. L., Bunker, R., Cabrera, B., Caldwell, D. O., Calkins, R., Cartaro, C., Cerdeno, D. G., Chagani, H., Chang, Y. -Y., Chen, Y., Cooley, J., Cornell, B., Cushman, P., Daal, M., Doughty, T., Dragowsky, E. M., Esteban, L., Fallows, S., Fascione, E., Figueroa-Feliciano, E., Fritts, M., Gerbier, G., Germond, R., Ghaith, M., Godfrey, G. L., Golwala, S. R., Hall, J., Harris, H. R., Holmgren, D., Hong, Z., Hsu, L., Huber, M. E., Iyer, V., Jardin, D., Jastram, A., Jena, C., Kelsey, M. H., Kennedy, A., Kubik, A., Kurinsky, N. A., Leder, A., Asamar, E. Lopez, Lukens, P., MacDonell, D., Mahapatra, R., Mandic, V., Mast, N., McCarthy, K. A., Miller, E. H., Mirabolfathi, N., Moffatt, R. A., Mohanty, B., Moore, D., Mendoza, J. D. Morales, Nelson, J., Oser, S. M., Page, K., Page, W. A., Partridge, R., Martinez, M. Penalver, Pepin, M., Phipps, A., Poudel, S., Pyle, M., Qiu, H., Rau, W., Redl, P., Reisetter, A., Roberts, A., Rogers, H. E., Robinson, A. E., Saab, T., Sadoulet, B., Sander, J., Schneck, K., Schnee, R. W., Scorza, S., Senapati, K., Serfass, B., Speller, D., Di Stefano, P. C. F., Stein, M., Street, J., Tanaka, H. A., Toback, D., Underwood, R., Villano, A. N., von Krosigk, B., Welliver, B., Wilson, J. S., Wilson, M. J., Wright, D. H., Yellin, S., Yen, J. J., Young, B. A., Zhang, X., and Zhao, X.

Subjects
Physics - Instrumentation and Detectors, Astrophysics - Instrumentation and Methods for Astrophysics, High Energy Physics - Experiment
Abstract

The Cryogenic Dark Matter Search (CDMS II) experiment aims to detect dark matter particles that elastically scatter from nuclei in semiconductor detectors. The resulting nuclear-recoil energy depositions are detected by ionization and phonon sensors. Neutrons produce a similar spectrum of low-energy nuclear recoils in such detectors, while most other backgrounds produce electron recoils. The absolute energy scale for nuclear recoils is necessary to interpret results correctly. The energy scale can be determined in CDMS II silicon detectors using neutrons incident from a broad-spectrum $^{252}$Cf source, taking advantage of a prominent resonance in the neutron elastic scattering cross section of silicon at a recoil (neutron) energy near 20 (182) keV. Results indicate that the phonon collection efficiency for nuclear recoils is $4.8^{+0.7}_{-0.9}$% lower than for electron recoils of the same energy. Comparisons of the ionization signals for nuclear recoils to those measured previously by other groups at higher electric fields indicate that the ionization collection efficiency for CDMS II silicon detectors operated at $\sim$4 V/cm is consistent with 100% for nuclear recoils below 20 keV and gradually decreases for larger energies to $\sim$75% at 100 keV. The impact of these measurements on previously published CDMS II silicon results is small., Comment: 22 pages, 17 figures, 1 table, 1 appendix

Published
2018
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23. Search for low-mass dark matter with CDMSlite using a profile likelihood fit

Author

Agnese, R, Aralis, T, Aramaki, T, Arnquist, IJ, Azadbakht, E, Baker, W, Banik, S, Barker, D, Bauer, DA, Binder, T, Bowles, MA, Brink, PL, Bunker, R, Cabrera, B, Calkins, R, Cameron, RA, Cartaro, C, Cerdeño, DG, Chang, Y-Y, Cooley, J, Cornell, B, Cushman, P, De Brienne, F, Doughty, T, Fascione, E, Figueroa-Feliciano, E, Fink, CW, Fritts, M, Gerbier, G, Germond, R, Ghaith, M, Golwala, SR, Harris, HR, Herbert, N, Hong, Z, Hoppe, EW, Hsu, L, Huber, ME, Iyer, V, Jardin, D, Jastram, A, Jena, C, Kelsey, MH, Kennedy, A, Kubik, A, Kurinsky, NA, Lawrence, RE, Loer, B, Asamar, E Lopez, Lukens, P, MacDonell, D, Mahapatra, R, Mandic, V, Mast, N, Miller, E, Mirabolfathi, N, Mohanty, B, Mendoza, JD Morales, Nelson, J, Neog, H, Orrell, JL, Oser, SM, Page, WA, Partridge, R, Pepin, M, Ponce, F, Poudel, S, Pyle, M, Qiu, H, Rau, W, Reisetter, A, Ren, R, Reynolds, T, Roberts, A, Robinson, AE, Rogers, HE, Saab, T, Sadoulet, B, Sander, J, Scarff, A, Schnee, RW, Scorza, S, Senapati, K, Serfass, B, Speller, D, Stanford, C, Stein, M, Street, J, Tanaka, HA, Toback, D, Underwood, R, Villano, AN, von Krosigk, B, Watkins, SL, Wilson, JS, Wilson, MJ, Winchell, J, Wright, DH, Yellin, S, and Young, BA

Subjects
astro-ph.CO, physics.ins-det, Astronomical and Space Sciences, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Quantum Physics, Nuclear & Particles Physics
Abstract

The Cryogenic Dark Matter Search low ionization threshold experiment (CDMSlite) searches for interactions between dark matter particles and germanium nuclei in cryogenic detectors. The experiment has achieved a low energy threshold with improved sensitivity to low-mass (

Published
2019

24. Results from the Super Cryogenic Dark Matter Search (SuperCDMS) experiment at Soudan

Author

SuperCDMS Collaboration, Agnese, R., Aramaki, T., Arnquist, I. J., Baker, W., Balakishiyeva, D., Banik, S., Barker, D., Thakur, R. Basu, Bauer, D. A., Binder, T., Bowles, M. A., Brink, P. L., Bunker, R., Cabrera, B., Caldwell, D. O., Calkins, R., Cartaro, C., Cerdeño, D. G., Chang, Y., Chen, Y., Cooley, J., Cornell, B., Cushman, P., Daal, M., Di Stefano, P. C. F., Doughty, T., Fascione, E., Figueroa-Feliciano, E., Fritts, M., Gerbier, G., Germond, R., Ghaith, M., Godfrey, G. L., Golwala, S. R., Hall, J., Harris, H. R., Hong, Z., Hoppe, E. W., Hsu, L., Huber, M. E., Iyer, V., Jardin, D., Jastram, A., Jena, C., Kelsey, M. H., Kennedy, A., Kubik, A., Kurinsky, N. A., Loer, B., Asamar, E. Lopez, Lukens, P., MacDonell, D., Mahapatra, R., Mandic, V., Mast, N., Miller, E. H., Mirabolfathi, N., Mohanty, B., Mendoza, J. D. Morales, Nelson, J., Orrell, J. L., Oser, S. M., Page, K., Page, W. A., Partridge, R., Martinez, M. Penalver, Pepin, M., Phipps, A., Poudel, S., Pyle, M., Qiu, H., Rau, W., Redl, P., Reisetter, A., Reynolds, T., Roberts, A., Robinson, A. E., Rogers, H. E., Saab, T., Sadoulet, B., Sander, J., Schneck, K., Schnee, R. W., Scorza, S., Senapati, K., Serfass, B., Speller, D., Stein, M., Street, J., Tanaka, H. A., Toback, D., Underwood, R., Villano, A. N., von Krosigk, B., Welliver, B., Wilson, J. S., Wilson, M. J., Wright, D. H., Yellin, S., Yen, J. J., Young, B. A., Zhang, X., and Zhao, X.

Subjects
High Energy Physics - Experiment, High Energy Physics - Phenomenology
Abstract

We report the result of a blinded search for Weakly Interacting Massive Particles (WIMPs) using the majority of the SuperCDMS Soudan dataset. With an exposure of 1690 kg days, a single candidate event is observed, consistent with expected backgrounds. This analysis (combined with previous Ge results) sets an upper limit on the spin-independent WIMP--nucleon cross section of $1.4 \times 10^{-44}$ ($1.0 \times 10^{-44}$) cm$^2$ at 46 GeV/$c^2$. These results set the strongest limits for WIMP--germanium-nucleus interactions for masses $>$12 GeV/$c^2$.

Published
2017
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25. Low-Mass Dark Matter Search with CDMSlite

Author

SuperCDMS Collaboration, Agnese, R., Anderson, A. J., Aralis, T., Aramaki, T., Arnquist, I. J., Baker, W., Balakishiyeva, D., Barker, D., Thakur, R. Basu, Bauer, D. A., Binder, T., Bowles, M. A., Brink, P. L., Bunker, R., Cabrera, B., Caldwell, D. O., Calkins, R., Cartaro, C., Cerdeno, D. G., Chang, Y., Chagani, H., Chen, Y., Cooley, J., Cornell, B., Cushman, P., Daal, M., Di Stefano, P. C. F., Doughty, T., Esteban, L., Fascione, E., Figueroa-Feliciano, E., Fritts, M., Gerbier, G., Ghaith, M., Godfrey, G. L., Golwala, S. R., Hall, J., Harris, H. R., Hong, Z., Hoppe, E. W., Hsu, L., Huber, M. E., Iyer, V., Jardin, D., Jastram, A., Jena, C., Kelsey, M. H., Kennedy, A., Kubik, A., Kurinsky, N. A., Leder, A., Loer, B., Asamar, E. Lopez, Lukens, P., MacDonell, D., Mahapatra, R., Mandic, V., Mast, N., Miller, E. H., Mirabolfathi, N., Moffatt, R. A., Mohanty, B., Mendoza, J. D. Morales, Nelson, J., Orrell, J. L., Oser, S. M., Page, K., Page, W. A., Partridge, R., Pepin, M., Martinez, M. Penalver, Phipps, A., Poudel, S., Pyle, M., Qiu, H., Rau, W., Redl, P., Reisetter, A., Reynolds, T., Roberts, A., Robinson, A. E., Rogers, H. E., Saab, T., Sadoulet, B., Sander, J., Schneck, K., Schnee, R. W., Scorza, S., Senapati, K., Serfass, B., Speller, D., Stein, M., Street, J., Tanaka, H. A., Toback, D., Underwood, R., Villano, A. N., von Krosigk, B., Welliver, B., Wilson, J. S., Wilson, M. J, Wright, D. H., Yellin, S., Yen, J. J., Young, B. A., Zhang, X., and Zhao, X.

Subjects
Astrophysics - Cosmology and Nongalactic Astrophysics, Astrophysics - Instrumentation and Methods for Astrophysics, High Energy Physics - Experiment, Physics - Instrumentation and Detectors
Abstract

The SuperCDMS experiment is designed to directly detect weakly interacting massive particles (WIMPs) that may constitute the dark matter in our Galaxy. During its operation at the Soudan Underground Laboratory, germanium detectors were run in the CDMSlite mode to gather data sets with sensitivity specifically for WIMPs with masses ${<}$10 GeV/$c^2$. In this mode, a higher detector-bias voltage is applied to amplify the phonon signals produced by drifting charges. This paper presents studies of the experimental noise and its effect on the achievable energy threshold, which is demonstrated to be as low as 56 eV$_{\text{ee}}$ (electron equivalent energy). The detector-biasing configuration is described in detail, with analysis corrections for voltage variations to the level of a few percent. Detailed studies of the electric-field geometry, and the resulting successful development of a fiducial parameter, eliminate poorly measured events, yielding an energy resolution ranging from ${\sim}$9 eV$_{\text{ee}}$ at 0 keV to 101 eV$_{\text{ee}}$ at ${\sim}$10 eV$_{\text{ee}}$. New results are derived for astrophysical uncertainties relevant to the WIMP-search limits, specifically examining how they are affected by variations in the most probable WIMP velocity and the Galactic escape velocity. These variations become more important for WIMP masses below 10 GeV/$c^2$. Finally, new limits on spin-dependent low-mass WIMP-nucleon interactions are derived, with new parameter space excluded for WIMP masses $\lesssim$3 GeV/$c^2$, Comment: 30 Pages, 33 Figures v3 to match published version in PRD. v2 contains public release (and documentation) of the CDMSlite Run 2 data as ancillary files

Published
2017
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26. First Dark Matter Constraints from a SuperCDMS Single-Charge Sensitive Detector

Author

Agnese, R, Aralis, T, Aramaki, T, Arnquist, IJ, Azadbakht, E, Baker, W, Banik, S, Barker, D, Bauer, DA, Binder, T, Bowles, MA, Brink, PL, Bunker, R, Cabrera, B, Calkins, R, Cartaro, C, Cerdeño, DG, Chang, Y-Y, Cooley, J, Cornell, B, Cushman, P, Di Stefano, PCF, Doughty, T, Fascione, E, Figueroa-Feliciano, E, Fink, C, Fritts, M, Gerbier, G, Germond, R, Ghaith, M, Golwala, SR, Harris, HR, Hong, Z, Hoppe, EW, Hsu, L, Huber, ME, Iyer, V, Jardin, D, Jena, C, Kelsey, MH, Kennedy, A, Kubik, A, Kurinsky, NA, Lawrence, RE, Leyva, JV, Loer, B, Asamar, E Lopez, Lukens, P, MacDonell, D, Mahapatra, R, Mandic, V, Mast, N, Miller, EH, Mirabolfathi, N, Mohanty, B, Mendoza, JD Morales, Nelson, J, Orrell, JL, Oser, SM, Page, WA, Partridge, R, Pepin, M, Phipps, A, Ponce, F, Poudel, S, Pyle, M, Qiu, H, Rau, W, Reisetter, A, Reynolds, T, Roberts, A, Robinson, AE, Rogers, HE, Romani, RK, Saab, T, Sadoulet, B, Sander, J, Scarff, A, Schnee, RW, Scorza, S, Senapati, K, Serfass, B, So, J, Speller, D, Stanford, C, Stein, M, Street, J, Tanaka, HA, Toback, D, Underwood, R, Villano, AN, von Krosigk, B, Watkins, SL, Wilson, JS, Wilson, MJ, Winchell, J, Wright, DH, Yellin, S, Young, BA, and Zhang, X

Subjects
Nuclear and Plasma Physics, Particle and High Energy Physics, Physical Sciences, hep-ex, astro-ph.CO, physics.ins-det, Mathematical Sciences, Engineering, General Physics, Mathematical sciences, Physical sciences
Abstract

We present the first limits on inelastic electron-scattering dark matter and dark photon absorption using a prototype SuperCDMS detector having a charge resolution of 0.1 electron-hole pairs (CDMS HVeV, a 0.93 g CDMS high-voltage device). These electron-recoil limits significantly improve experimental constraints on dark matter particles with masses as low as 1  MeV/c^{2}. We demonstrate a sensitivity to dark photons competitive with other leading approaches but using substantially less exposure (0.49 g d). These results demonstrate the scientific potential of phonon-mediated semiconductor detectors that are sensitive to single electronic excitations.

Published
2018

27. Results from the Super Cryogenic Dark Matter Search Experiment at Soudan

Author

Agnese, R, Aramaki, T, Arnquist, IJ, Baker, W, Balakishiyeva, D, Banik, S, Barker, D, Thakur, R Basu, Bauer, DA, Binder, T, Bowles, MA, Brink, PL, Bunker, R, Cabrera, B, Caldwell, DO, Calkins, R, Cartaro, C, Cerdeño, DG, Chang, Y, Chen, Y, Cooley, J, Cornell, B, Cushman, P, Daal, M, Di Stefano, PCF, Doughty, T, Fascione, E, Figueroa-Feliciano, E, Fritts, M, Gerbier, G, Germond, R, Ghaith, M, Godfrey, GL, Golwala, SR, Hall, J, Harris, HR, Hong, Z, Hoppe, EW, Hsu, L, Huber, ME, Iyer, V, Jardin, D, Jastram, A, Jena, C, Kelsey, MH, Kennedy, A, Kubik, A, Kurinsky, NA, Loer, B, Asamar, E Lopez, Lukens, P, MacDonell, D, Mahapatra, R, Mandic, V, Mast, N, Miller, EH, Mirabolfathi, N, Mohanty, B, Mendoza, JD Morales, Nelson, J, Orrell, JL, Oser, SM, Page, K, Page, WA, Partridge, R, Martinez, M Penalver, Pepin, M, Phipps, A, Poudel, S, Pyle, M, Qiu, H, Rau, W, Redl, P, Reisetter, A, Reynolds, T, Roberts, A, Robinson, AE, Rogers, HE, Saab, T, Sadoulet, B, Sander, J, Schneck, K, Schnee, RW, Scorza, S, Senapati, K, Serfass, B, Speller, D, Stein, M, Street, J, Tanaka, HA, Toback, D, Underwood, R, Villano, AN, von Krosigk, B, Welliver, B, Wilson, JS, Wilson, MJ, Wright, DH, Yellin, S, and Yen, JJ

Subjects
SuperCDMS Collaboration, hep-ex, hep-ph, Mathematical Sciences, Physical Sciences, Engineering, General Physics
Abstract

We report the result of a blinded search for weakly interacting massive particles (WIMPs) using the majority of the SuperCDMS Soudan data set. With an exposure of 1690 kg d, a single candidate event is observed, consistent with expected backgrounds. This analysis (combined with previous Ge results) sets an upper limit on the spin-independent WIMP-nucleon cross section of 1.4×10^{-44} (1.0×10^{-44})  cm^{2} at 46  GeV/c^{2}. These results set the strongest limits for WIMP-germanium-nucleus interactions for masses >12  GeV/c^{2}.

Published
2018

28. Low-mass dark matter search with CDMSlite

Author

Agnese, R, Anderson, AJ, Aralis, T, Aramaki, T, Arnquist, IJ, Baker, W, Balakishiyeva, D, Barker, D, Basu Thakur, R, Bauer, DA, Binder, T, Bowles, MA, Brink, PL, Bunker, R, Cabrera, B, Caldwell, DO, Calkins, R, Cartaro, C, Cerdeño, DG, Chang, Y, Chagani, H, Chen, Y, Cooley, J, Cornell, B, Cushman, P, Daal, M, Di Stefano, PCF, Doughty, T, Esteban, L, Fascione, E, Figueroa-Feliciano, E, Fritts, M, Gerbier, G, Ghaith, M, Godfrey, GL, Golwala, SR, Hall, J, Harris, HR, Hong, Z, Hoppe, EW, Hsu, L, Huber, ME, Iyer, V, Jardin, D, Jastram, A, Jena, C, Kelsey, MH, Kennedy, A, Kubik, A, Kurinsky, NA, Leder, A, Loer, B, Lopez Asamar, E, Lukens, P, Macdonell, D, Mahapatra, R, Mandic, V, Mast, N, Miller, EH, Mirabolfathi, N, Moffatt, RA, Mohanty, B, Morales Mendoza, JD, Nelson, J, Orrell, JL, Oser, SM, Page, K, Page, WA, Partridge, R, Pepin, M, Peñalver Martinez, M, Phipps, A, Poudel, S, Pyle, M, Qiu, H, Rau, W, Redl, P, Reisetter, A, Reynolds, T, Roberts, A, Robinson, AE, Rogers, HE, Saab, T, Sadoulet, B, Sander, J, Schneck, K, Schnee, RW, Scorza, S, Senapati, K, Serfass, B, Speller, D, Stein, M, Street, J, Tanaka, HA, Toback, D, Underwood, R, Villano, AN, Von Krosigk, B, Welliver, B, and Wilson, JS

Subjects
astro-ph.CO, astro-ph.IM, hep-ex, physics.ins-det
Abstract

The SuperCDMS experiment is designed to directly detect weakly interacting massive particles (WIMPs) that may constitute the dark matter in our Galaxy. During its operation at the Soudan Underground Laboratory, germanium detectors were run in the CDMSlite mode to gather data sets with sensitivity specifically for WIMPs with masses

Published
2018

29. A HEMT-Based Cryogenic Charge Amplifier with sub-100 eVee Ionization Resolution for Massive Semiconductor Dark Matter Detectors

Author

Phipps, A., Juillard, A., Sadoulet, B., Serfass, B., and Jin, Y.

Subjects
Physics - Instrumentation and Detectors, Astrophysics - Instrumentation and Methods for Astrophysics
Abstract

We present the measured baseline ionization resolution of a HEMT-based cryogenic charge amplifier coupled to a CDMS-II detector. The amplifier has been developed to allow massive semiconductor dark matter detectors to retain background discrimination at the low recoil energies produced by low-mass WIMPs. We find a calibrated baseline ionization resolution of $\sigma_E = 91\,\text{eV}_{ee}$. To our knowledge, this is the best direct ionization resolution achieved with such massive ($\approx$150 pF capacitance) radiation detectors., Comment: Published in Nuclear Instruments and Methods in Physics Research Section A

Published
2016
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30. Projected Sensitivity of the SuperCDMS SNOLAB experiment

Author

Agnese, R., Anderson, A. J., Aramaki, T., Arnquist, I., Baker, W., Barker, D., Thakur, R. Basu, Bauer, D. A., Borgland, A., Bowles, M. A., Brink, P. L., Bunker, R., Cabrera, B., Caldwell, D. O., Calkins, R., Cartaro, C., Cerdeño, D. G., Chagani, H., Chen, Y., Cooley, J., Cornell, B., Cushman, P., Daal, M., Di Stefano, P. C. F., Doughty, T., Esteban, L., Fallows, S., Figueroa-Feliciano, E., Fritts, M., Gerbier, G., Ghaith, M., Godfrey, G. L., Golwala, S. R., Hall, J., Harris, H. R., Hofer, T., Holmgren, D., Hong, Z., Hoppe, E., Hsu, L., Huber, M. E., Iyer, V., Jardin, D., Jastram, A., Kelsey, M. H., Kennedy, A., Kubik, A., Kurinsky, N. A., Leder, A., Loer, B., Asamar, E. Lopez, Lukens, P., Mahapatra, R., Mandic, V., Mast, N., Mirabolfathi, N., Moffatt, R. A., Mendoza, J. D. Morales, Orrell, J. L., Oser, S. M., Page, K., Page, W. A., Partridge, R., Pepin, M., Phipps, A., Poudel, S., Pyle, M., Qiu, H., Rau, W., Redl, P., Reisetter, A., Roberts, A., Robinson, A. E., Rogers, H. E., Saab, T., Sadoulet, B., Sander, J., Schneck, K., Schnee, R. W., Serfass, B., Speller, D., Stein, M., Street, J., Tanaka, H. A., Toback, D., Underwood, R., Villano, A. N., von Krosigk, B., Welliver, B., Wilson, J. S., Wright, D. H., Yellin, S., Yen, J. J., Young, B. A., Zhang, X., and Zhao, X.

Subjects
Physics - Instrumentation and Detectors, Astrophysics - Cosmology and Nongalactic Astrophysics, High Energy Physics - Experiment
Abstract

SuperCDMS SNOLAB will be a next-generation experiment aimed at directly detecting low-mass (< 10 GeV/c$^2$) particles that may constitute dark matter by using cryogenic detectors of two types (HV and iZIP) and two target materials (germanium and silicon). The experiment is being designed with an initial sensitivity to nuclear recoil cross sections ~ 1 x 10$^{-43}$ cm$^2$ for a dark matter particle mass of 1 GeV/c$^2$, and with capacity to continue exploration to both smaller masses and better sensitivities. The phonon sensitivity of the HV detectors will be sufficient to detect nuclear recoils from sub-GeV dark matter. A detailed calibration of the detector response to low energy recoils will be needed to optimize running conditions of the HV detectors and to interpret their data for dark matter searches. Low-activity shielding, and the depth of SNOLAB, will reduce most backgrounds, but cosmogenically produced $^{3}$H and naturally occurring $^{32}$Si will be present in the detectors at some level. Even if these backgrounds are x10 higher than expected, the science reach of the HV detectors would be over three orders of magnitude beyond current results for a dark matter mass of 1 GeV/c$^2$. The iZIP detectors are relatively insensitive to variations in detector response and backgrounds, and will provide better sensitivity for dark matter particle masses (> 5 GeV/c$^2$). The mix of detector types (HV and iZIP), and targets (germanium and silicon), planned for the experiment, as well as flexibility in how the detectors are operated, will allow us to maximize the low-mass reach, and understand the backgrounds that the experiment will encounter. Upgrades to the experiment, perhaps with a variety of ultra-low-background cryogenic detectors, will extend dark matter sensitivity down to the "neutrino floor", where coherent scatters of solar neutrinos become a limiting background., Comment: SuperCDMS SNOLAB Projected sensitivity reach

Published
2016
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31. Projected sensitivity of the SuperCDMS SNOLAB experiment

Author

Agnese, R, Anderson, AJ, Aramaki, T, Arnquist, I, Baker, W, Barker, D, Thakur, R Basu, Bauer, DA, Borgland, A, Bowles, MA, Brink, PL, Bunker, R, Cabrera, B, Caldwell, DO, Calkins, R, Cartaro, C, Cerdeño, DG, Chagani, H, Chen, Y, Cooley, J, Cornell, B, Cushman, P, Daal, M, Di Stefano, PCF, Doughty, T, Esteban, L, Fallows, S, Figueroa-Feliciano, E, Fritts, M, Gerbier, G, Ghaith, M, Godfrey, GL, Golwala, SR, Hall, J, Harris, HR, Hofer, T, Holmgren, D, Hong, Z, Hoppe, E, Hsu, L, Huber, ME, Iyer, V, Jardin, D, Jastram, A, Kelsey, MH, Kennedy, A, Kubik, A, Kurinsky, NA, Leder, A, Loer, B, Asamar, E Lopez, Lukens, P, Mahapatra, R, Mandic, V, Mast, N, Mirabolfathi, N, Moffatt, RA, Mendoza, JD Morales, Orrell, JL, Oser, SM, Page, K, Page, WA, Partridge, R, Pepin, M, Phipps, A, Poudel, S, Pyle, M, Qiu, H, Rau, W, Redl, P, Reisetter, A, Roberts, A, Robinson, AE, Rogers, HE, Saab, T, Sadoulet, B, Sander, J, Schneck, K, Schnee, RW, Serfass, B, Speller, D, Stein, M, Street, J, Tanaka, HA, Toback, D, Underwood, R, Villano, AN, von Krosigk, B, Welliver, B, Wilson, JS, Wright, DH, Yellin, S, Yen, JJ, Young, BA, Zhang, X, and Zhao, X

Subjects
Nuclear and Plasma Physics, Particle and High Energy Physics, Physical Sciences, physics.ins-det, astro-ph.CO, hep-ex, Astronomical and Space Sciences, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Quantum Physics, Nuclear & Particles Physics, Mathematical physics, Astronomical sciences, Particle and high energy physics
Abstract

SuperCDMS SNOLAB will be a next-generation experiment aimed at directly detecting low-mass particles (with masses ≤10 GeV/c2) that may constitute dark matter by using cryogenic detectors of two types (HV and iZIP) and two target materials (germanium and silicon). The experiment is being designed with an initial sensitivity to nuclear recoil cross sections ∼1×10-43 cm2 for a dark matter particle mass of 1 GeV/c2, and with capacity to continue exploration to both smaller masses and better sensitivities. The phonon sensitivity of the HV detectors will be sufficient to detect nuclear recoils from sub-GeV dark matter. A detailed calibration of the detector response to low-energy recoils will be needed to optimize running conditions of the HV detectors and to interpret their data for dark matter searches. Low-activity shielding, and the depth of SNOLAB, will reduce most backgrounds, but cosmogenically produced H3 and naturally occurring Si32 will be present in the detectors at some level. Even if these backgrounds are 10 times higher than expected, the science reach of the HV detectors would be over 3 orders of magnitude beyond current results for a dark matter mass of 1 GeV/c2. The iZIP detectors are relatively insensitive to variations in detector response and backgrounds, and will provide better sensitivity for dark matter particles with masses 5 GeV/c2. The mix of detector types (HV and iZIP), and targets (germanium and silicon), planned for the experiment, as well as flexibility in how the detectors are operated, will allow us to maximize the low-mass reach, and understand the backgrounds that the experiment will encounter. Upgrades to the experiment, perhaps with a variety of ultra-low-background cryogenic detectors, will extend dark matter sensitivity down to the "neutrino floor," where coherent scatters of solar neutrinos become a limiting background.

Published
2017

32. WIMP-Search Results from the Second CDMSlite Run

Author

SuperCDMS Collaboration, Agnese, R., Anderson, A. J., Aramaki, T., Asai, M., Baker, W., Balakishiyeva, D., Barker, D., Thakur, R. Basu, Bauer, D. A., Billard, J., Borgland, A., Bowles, M. A., Brink, P. L., Bunker, R., Cabrera, B., Caldwell, D. O., Calkins, R., Cerdeno, D. G., Chagani, H., Chen, Y., Cooley, J., Cornell, B., Cushman, P., Daal, M., Di Stefano, P. C. F., Doughty, T., Esteban, L., Fallows, S., Figueroa-Feliciano, E., Ghaith, M., Godfrey, G. L., Golwala, S. R., Hall, J., Harris, H. R., Hofer, T., Holmgren, D., Hsu, L., Huber, M. E., Jardin, D., Jastram, A., Kamaev, O., Kara, B., Kelsey, M. H., Kennedy, A., Leder, A., Loer, B., Asamar, E. Lopez, Lukens, P., Mahapatra, R., Mandic, V., Mast, N., Mirabolfathi, N., Moffatt, R. A., Mendoza, J. D. Morales, 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., Roberts, A., Rogers, H. E., Saab, T., Sadoulet, B., Sander, J., Schneck, K., Schnee, R. W., Scorza, S., Serfass, B., Shank, B., Speller, D., Toback, D., Underwood, R., Upadhyayula, S., Villano, A. N., Welliver, B., Wilson, J. S., Wright, D. H., Yellin, S., Yen, J. J., Young, B. A., and Zhang, J.

Subjects
Astrophysics - Cosmology and Nongalactic Astrophysics, Astrophysics - Instrumentation and Methods for Astrophysics, High Energy Physics - Experiment, Physics - Instrumentation and Detectors
Abstract

The CDMS low ionization threshold experiment (CDMSlite) uses cryogenic germanium detectors operated at a relatively high bias voltage to amplify the phonon signal in the search for weakly interacting massive particles (WIMPs). Results are presented from the second CDMSlite run with an exposure of 70 kg days, which reached an energy threshold for electron recoils as low as 56 eV. A fiducialization cut reduces backgrounds below those previously reported by CDMSlite. New parameter space for the WIMP-nucleon spin-independent cross section is excluded for WIMP masses between 1.6 and 5.5 GeV/$c^2$., Comment: 6 pages, 4 figures. v2 Matches the accepted version in PRL

Published
2015
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33. Improved WIMP-search reach of the CDMS II germanium data

Author

Agnese, R., Anderson, A. J., Asai, M., Balakishiyeva, D., Barker, D., Thakur, R. Basu, 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., Asamar, E. Lopez, 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.

Subjects
High Energy Physics - Experiment, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract

CDMS II data from the 5-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 WIMP-search exposure. An extended analysis was also completed by decreasing the 10 keV analysis threshold to $\sim$5 keV, to increase sensitivity near a WIMP mass of 8 GeV/$c^2$. After unblinding, there were zero candidate events above a deposited energy of 10 keV and 6 events in the lower-threshold analysis. This yielded minimum WIMP-nucleon spin-independent scattering cross-section limits of $1.8 \times 10^{-44}$ and $1.18 \times 10 ^{-41}$ cm$^2$ 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., Comment: 25 pages, 15 figures, slightly updated organization and text consistent with PRD referee process, Fig. 14 updated

Published
2015
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34. Dark matter effective field theory scattering in direct detection experiments

Author

Schneck, K., Cabrera, B., Cerdeno, D. G., Mandic, V., Rogers, H. E., Agnese, R., Anderson, A. J., Asai, M., Balakishiyeva, D., Barker, D., Thakur, R. Basu, Bauer, D. A., Billard, J., Borgland, A., Brandt, D., Brink, P. L., Bunker, R., Caldwell, D. O., Calkins, R., 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., Hofer, T., Holmgren, D., Hsu, L., Huber, M. E., Jardin, D. M., Jastram, A., Kamaev, O., Kara, B., Kelsey, M. H., Kennedy, A., Leder, A., Loer, B., Asamar, E. Lopez, Lukens, P., Mahapatra, R., McCarthy, K. A., Mirabolfathi, N., Moffatt, R. A., Mendoza, J. D. Morales, 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., Roberts, A., Saab, T., Sadoulet, B., Sander, J., 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.

Subjects
Astrophysics - Cosmology and Nongalactic Astrophysics, High Energy Physics - Experiment, High Energy Physics - Phenomenology
Abstract

We examine the consequences of the effective field theory (EFT) of dark matter-nucleon scattering for current and proposed direct detection experiments. Exclusion limits on EFT coupling constants computed using the optimum interval method are presented for SuperCDMS Soudan, CDMS II, and LUX, and the necessity of combining results from multiple experiments in order to determine dark matter parameters is discussed. We demonstrate that spectral differences between the standard dark matter model and a general EFT interaction can produce a bias when calculating exclusion limits and when developing signal models for likelihood and machine learning techniques. We also discuss the implications of the EFT for the next-generation (G2) direct detection experiments and point out regions of complementarity in the EFT parameter space., Comment: Newest version includes erratum

Published
2015
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35. New Results from the Search for Low-Mass Weakly Interacting Massive Particles with the CDMS Low Ionization Threshold Experiment

Author

Agnese, R, Anderson, AJ, Aramaki, T, Asai, M, Baker, W, Balakishiyeva, D, Barker, D, Thakur, R Basu, Bauer, DA, Billard, J, Borgland, A, Bowles, MA, Brink, PL, Bunker, R, Cabrera, B, Caldwell, DO, Calkins, R, Cerdeno, DG, Chagani, H, Chen, Y, Cooley, J, Cornell, B, Cushman, P, Daal, M, Di Stefano, PCF, Doughty, T, Esteban, L, Fallows, S, Figueroa-Feliciano, E, Ghaith, M, Godfrey, GL, Golwala, SR, Hall, J, Harris, HR, Hofer, T, Holmgren, D, Hsu, L, Huber, ME, Jardin, D, Jastram, A, Kamaev, O, Kara, B, Kelsey, MH, Kennedy, A, Leder, A, Loer, B, Asamar, E Lopez, Lukens, P, Mahapatra, R, Mandic, V, Mast, N, Mirabolfathi, N, Moffatt, RA, Mendoza, JD Morales, Oser, SM, Page, K, Page, WA, Partridge, R, Pepin, M, Phipps, A, Prasad, K, Pyle, M, Qiu, H, Rau, W, Redl, P, Reisetter, A, Ricci, Y, Roberts, A, Rogers, HE, Saab, T, Sadoulet, B, Sander, J, Schneck, K, Schnee, RW, Scorza, S, Serfass, B, Shank, B, Speller, D, Toback, D, Underwood, R, Upadhyayula, S, Villano, AN, Welliver, B, Wilson, JS, Wright, DH, Yellin, S, Yen, JJ, Young, BA, and Zhang, J

Subjects
SuperCDMS Collaboration, astro-ph.CO, astro-ph.IM, hep-ex, physics.ins-det, Mathematical Sciences, Physical Sciences, Engineering, General Physics
Abstract

The CDMS low ionization threshold experiment (CDMSlite) uses cryogenic germanium detectors operated at a relatively high bias voltage to amplify the phonon signal in the search for weakly interacting massive particles (WIMPs). Results are presented from the second CDMSlite run with an exposure of 70 kg day, which reached an energy threshold for electron recoils as low as 56 eV. A fiducialization cut reduces backgrounds below those previously reported by CDMSlite. New parameter space for the WIMP-nucleon spin-independent cross section is excluded for WIMP masses between 1.6 and 5.5  GeV/c^{2}.

Published
2016

36. Maximum Likelihood Analysis of Low Energy CDMS II Germanium Data

Author

SuperCDMS Collaboration, Agnese, R., Anderson, A. J., Balakishiyeva, D., Thakur, R. Basu, Bauer, D. A., Billard, J., Borgland, A., Bowles, M. A., Brandt, D., Brink, P. L., Bunker, R., Cabrera, B., Caldwell, D. O., Cerdeno, 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., Fritts, M., Godfrey, G. L., Golwala, S. R., Graham, M., Hall, J., Harris, H. R., Hertel, S. A., Hofer, T., Holmgren, D., Hsu, L., Huber, M. E., Jastram, A., Kamaev, O., Kara, B., Kelsey, M. H., Kennedy, A., Kiveni, M., Koch, K., Leder, A., Loer, B., Asamar, E. Lopez, Mahapatra, R., Mandic, V., Martinez, C., McCarthy, K. A., Mirabolfathi, N., Moffatt, R. A., Moore, D. C., Nelson, R. H., 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., Upadhyayula, S., Villano, A. N., Welliver, B., Wright, D. H., Yellin, S., Yen, J. J., Young, B. A., and Zhang, J.

Subjects
Astrophysics - Cosmology and Nongalactic Astrophysics, Astrophysics - Instrumentation and Methods for Astrophysics, Physics - Instrumentation and Detectors
Abstract

We report on the results of a search for a Weakly Interacting Massive Particle (WIMP) signal in low-energy data of the Cryogenic Dark Matter Search (CDMS~II) experiment using a maximum likelihood analysis. A background model is constructed using GEANT4 to simulate the surface-event background from $^{210}$Pb decay-chain events, while using independent calibration data to model the gamma background. Fitting this background model to the data results in no statistically significant WIMP component. In addition, we perform fits using an analytic ad hoc background model proposed by Collar and Fields, who claimed to find a large excess of signal-like events in our data. We confirm the strong preference for a signal hypothesis in their analysis under these assumptions, but excesses are observed in both single- and multiple-scatter events, which implies the signal is not caused by WIMPs, but rather reflects the inadequacy of their background model., Comment: 12 pages, 12 figures, submitted to PRD

Published
2014
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37. First direct limits on Lightly Ionizing Particles with electric charge less than $e/6$

Author

Agnese, R., Anderson, A. J., Balakishiyeva, D., Thakur, R. Basu, Bauer, D. A., Billard, J., Borgland, A., Bowles, M. A., Brandt, D., Brink, P. L., Bunker, R., Cabrera, B., Caldwell, D. O., Cerdeno, 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., Jastram, A., Kamaev, O., Kara, B., Kelsey, M. H., Kennedy, A., Kiveni, M., Koch, K., Leder, A., Loer, B., Asamar, E. Lopez, Mahapatra, R., Mandic, V., Martinez, C., McCarthy, K. A., Mirabolfathi, N., Moffatt, R. A., Moore, D. C., Nelson, H., Nelson, R. H., Ogburn, R. W., 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., Upadhyayula, S., Villano, A. N., Welliver, B., Wright, D. H., Yellin, S., Yen, J. J., Young, B. A., and Zhang, J.

Subjects
High Energy Physics - Experiment, Astrophysics - Cosmology and Nongalactic Astrophysics, Astrophysics - High Energy Astrophysical Phenomena, Physics - Instrumentation and Detectors
Abstract

While the Standard Model of particle physics does not include free particles with fractional charge, experimental searches have not ruled out their existence. We report results from the Cryogenic Dark Matter Search (CDMS II) experiment that give the first direct-detection limits for cosmogenically-produced relativistic particles with electric charge lower than $e$/6. A search for tracks in the six stacked detectors of each of two of the CDMS II towers found no candidates, thereby excluding new parameter space for particles with electric charges between $e$/6 and $e$/200., Comment: 5 pages, 6 figures, submitted to PRL

Published
2014
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38. The Physics of the B Factories

Author

Bevan, A. J., Golob, B., Mannel, Th., Prell, S., Yabsley, B. D., Abe, K., Aihara, H., Anulli, F., Arnaud, N., Aushev, T., Beneke, M., Beringer, J., Bianchi, F., Bigi, I. I., Bona, M., Brambilla, N., rodzicka, J. B, Chang, P., Charles, M. J., Cheng, C. H., Cheng, H. -Y., Chistov, R., Colangelo, P., Coleman, J. P., Drutskoy, A., Druzhinin, V. P., Eidelman, S., Eigen, G., Eisner, A. M., Faccini, R., Flood, K. T ., Gambino, P., Gaz, A., Gradl, W., Hayashii, H., Higuchi, T., Hulsbergen, W. D., Hurth, T., Iijima, T., Itoh, R., Jackson, P. D., Kass, R., Kolomensky, Yu. G., Kou, E., Križan, P., Kronfeld, A., Kumano, S., Kwon, Y. J., Latham, T. E., Leith, D. W. G. S., Lüth, V., Martinez-Vidal, F., Meadows, B. T., Mussa, R., Nakao, M., Nishida, S., Ocariz, J., Olsen, S. L., Pakhlov, P., Pakhlova, G., Palano, A., Pich, A., Playfer, S., Poluektov, A., Porter, F. C., Robertson, S. H., Roney, J. M., Roodman, A., Sakai, Y., Schwanda, C., Schwartz, A. J., Seidl, R., Sekula, S. J., Steinhauser, M., Sumisawa, K., Swanson, E. S., Tackmann, F., Trabelsi, K., Uehara, S., Uno, S., van der Water, R., Vasseur, G., Verkerke, W., Waldi, R., Wang, M. Z., Wilson, F. F., Zupan, J., Zupanc, A., Adachi, I., Albert, J., Banerjee, Sw., Bellis, M., Ben-Haim, E., Biassoni, P., Cahn, R. N., Cartaro, C., Chauveau, J., Chen, C., Chiang, C. C., Cowan, R., Dalseno, J., Davier, M., Davies, C., Dingfelder, J. C., nard, B. Eche, Epifanov, D., Fulsom, B. G., Gabareen, A. M., Gary, J. W., Godang, R., Graham, M. T., Hafner, A., Hamilton, B., Hartmann, T., Hayasaka, K., Hearty, C., Iwasaki, Y., Khodjamirian, A., Kusaka, A., Kuzmin, A., Lafferty, G. D., Lazzaro, A., Li, J., Lindemann, D., Long, O., Lusiani, A., Marchiori, G., Martinelli, M., Miyabayashi, K., Mizuk, R., Mohanty, G. B., Muller, D. R., Nakazawa, H., Ongmongkolkul, P., Pacetti, S., Palombo, F., Pedlar, T. K., Piilonen, L. E., Pilloni, A., Poireau, V., Prothmann, K., Pulliam, T., Rama, M., Ratcliff, B. N., Roudeau, P., Schrenk, S., Schroeder, T., Schubert, K. R., Shen, C. P., Shwartz, B., Soffer, A., Solodov, E. P., Somov, A., Starič, M., Stracka, S., Telnov, A. V., Todyshev, K. Yu., Tsuboyama, T., Uglov, T., Vinokurova, A., Walsh, J. J., Watanabe, Y., Won, E., Wormser, G., Wright, D. H., Ye, S., Zhang, C. C., Abachi, S., Abashian, A., Abe, N., Abe, R., Abe, T., Abrams, G. S., Adam, I., Adamczyk, K., Adametz, A., Adye, T., Agarwal, A., Ahmed, H., Ahmed, M., Ahmed, S., Ahn, B. S., Ahn, H. S., Aitchison, I. J. R., Akai, K., Akar, S., Akatsu, M., Akemoto, M., Akhmetshin, R., Akre, R., Alam, M. S., Albert, J. N., Aleksan, R., Alexander, J. P., Alimonti, G., Allen, M. T., Allison, J., Allmendinger, T., Alsmiller, J. R. G., Altenburg, D., Alwyn, K. E., An, Q., Anderson, J., Andreassen, R., Andreotti, D., Andreotti, M., Andress, J. C., Angelini, C., Anipko, D., Anjomshoaa, A., Anthony, P. L., Antillon, E. A., Antonioli, E., Aoki, K., Arguin, J. 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A., Natkaniec, Z., Nauenberg, U., Nayak, M., Neal, H., Nedelkovska, E., Negrini, M., Neichi, K., Nelson, D., Nelson, S., Neri, N., Nesom, G., Neubauer, S., Newman-Coburn, D., Ng, C., Nguyen, X., Nicholson, H., Niebuhr, C., Nief, J. Y., Niiyama, M., Nikolich, M. B., Nisar, N. K., Nishimura, K., Nishio, Y., Nitoh, O., Nogowski, R., Noguchi, S., Nomura, T., Nordby, M., Nosochkov, Y., Novokhatski, A., Nozaki, S., Nozaki, T., Nugent, I. M., O'Grady, C. P., O'Neale, S. W., O'Neill, F. G., Oberhof, B., Oddone, P. J., Ofte, I., Ogawa, A., Ogawa, K., Ogawa, S., Ogawa, Y., Ohkubo, R., Ohmi, K., Ohnishi, Y., Ohno, F., Ohshima, T., Ohshima, Y., Ohuchi, N., Oide, K., Oishi, N., Okabe, T., Okazaki, N., Okazaki, T., Okuno, S., Olaiya, E. O., Olivas, A., Olley, P., Olsen, J., Ono, S., Onorato, G., Onuchin, A. P., Onuki, Y., Ooba, T., Orimoto, T. J., Oshima, T., Osipenkov, I. L., Ostrowicz, W., Oswald, C., Otto, S., Oyang, J., Oyanguren, A., Ozaki, H., Ozcan, V. E., Paar, H. 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G., Piatenko, T., Piccolo, D., Piccolo, M., Piemontese, L., Piemontese, M., Pierini, M., Pierson, S., Pioppi, M., Piredda, G., Pivk, M., Plaszczynski, S., Polci, F., Pompili, A., Poropat, P., Posocco, M., Potter, C. T., Potter, R. J. L., Prasad, V., Prebys, E., Prencipe, E., Prendki, J., Prepost, R., Prest, M., Prim, M., Pripstein, M., Prudent, X., Pruvot, S., Puccio, E. M. T., Purohit, M. V., Qi, N. D., Quinn, H., Raaf, J., Rabberman, R., Raffaelli, F., Ragghianti, G., Rahatlou, S., Rahimi, A. M., Rahmat, R., Rakitin, A. Y., Randle-Conde, A., Rankin, P., Rashevskaya, I., Ratkovsky, S., Raven, G., Re, V., Reep, M., Regensburger, J. J., Reidy, J., Reif, R., Reisert, B., Renard, C., Renga, F., Ricciardi, S., Richman, J. D., Ritchie, J. L., Ritter, M., Rivetta, C., Rizzo, G., Roat, C., Robbe, P., Roberts, D. A., Robertson, A. I., Robutti, E., Rodier, S., Rodriguez, D. M., Rodriguez, J. L., Rodriguez, R., Roe, N. A., Röhrken, M., Roethel, W., Rolquin, J., Romanov, L., Romosan, A., Ronan, M. T., Rong, G., Ronga, F. J., Roos, L., Root, N., Rosen, M., Rosenberg, E. I., Rossi, A., Rostomyan, A., Rotondo, M., Roussot, E., Roy, J., Rozanska, M., Rozen, Y., Rubin, A. E., Ruddick, W. O., Ruland, A. M., Rybicki, K., Ryd, A., Ryu, S., Ryuko, J., Sabik, S., Sacco, R., Saeed, M. A., Tehrani, F. Safai, Sagawa, H., Sahoo, H., Sahu, S., Saigo, M., Saito, T., Saitoh, S., Sakai, K., Sakamoto, H., Sakaue, H., Saleem, M., Salnikov, A. A., Salvati, E., Salvatore, F., Samuel, A., Sanders, D. A., Sanders, P., Sandilya, S., Sandrelli, F., Sands, W., Sands, W. R., Sanpei, M., Santel, D., Santelj, L., Santoro, V., Santroni, A., Sanuki, T., Sarangi, T. R., Saremi, S., Sarti, A., Sasaki, T., Sasao, N., Satapathy, M., Sato, Nobuhiko, Sato, Noriaki, Sato, Y., Satoyama, N., Satpathy, A., Savinov, V., Savvas, N., Saxton, O. H., Sayeed, K., Schaffner, S. F., Schalk, T., Schenk, S., Schieck, J. R., Schietinger, T., Schilling, C. J., Schindler, R. H., Schmid, S., Schmitz, R. E., Schmuecker, H., Schneider, O., Schnell, G., Schönmeier, P., Schofield, K. C., Schott, G., Schröder, H., Schram, M., Schubert, J., Schümann, J., Schultz, J., Schumm, B. A., Schune, M. H., Schwanke, U., Schwarz, H., Schwiening, J., Schwierz, R., Schwitters, R. F., Sciacca, C., Sciolla, G., Scott, I. J., Seeman, J., Seiden, A., Seitz, R., Seki, T., Sekiya, A. I., Semenov, S., Semmler, D., Sen, S., Senyo, K., Seon, O., Serbo, V. V., Serednyakov, S. I., Serfass, B., Serra, M., Serrano, J., Settai, Y., Seuster, R., Sevior, M. E., Shakhova, K. V., Shang, L., Shapkin, M., Sharma, V., Shebalin, V., Shelkov, V. G., Shen, B. C., Shen, D. Z., Shen, Y. T., Sherwood, D. J., Shibata, T., Shibata, T. A., Shibuya, H., Shidara, T., Shimada, K., Shimoyama, M., Shinomiya, S., Shiu, J. G., Shorthouse, H. W., Shpilinskaya, L. I., Sibidanov, A., Sicard, E., Sidorov, A., Sidorov, V., Siegle, V., Sigamani, M., Simani, M. C., Simard, M., Simi, G., Simon, F., Simonetto, F., Sinev, N. B., Singh, H., Singh, J. B., Sinha, R., Sitt, S., Skovpen, Yu. I., Sloane, R. J., Smerkol, P., Smith, A. J. S., Smith, D., Smith, D. S., Smith, J. G., Smol, A., Snoek, H. L., Snyder, A., So, R. Y., Sobie, R. J., Soderstrom, E., Soha, A., Sohn, Y. S., Sokoloff, M. D., Sokolov, A., Solagna, P., Solovieva, E., Soni, N., Sonnek, P., Sordini, V., Spaan, B., Spanier, S. M., Spencer, E., Speziali, V., Spitznagel, M., Spradlin, P., Staengle, H., Stamen, R., Stanek, M., Stanič, S., Stark, J., Steder, M., Steininger, H., Steinke, M., Stelzer, J., Stevanato, E., Stocchi, A., Stock, R., Stoeck, H., Stoker, D. P., Stroili, R., Strom, D., Strother, P., Strube, J., Stugu, B., Stypula, J., Su, D., Suda, R., Sugahara, R., Sugi, A., Sugimura, T., Sugiyama, A., Suitoh, S., Sullivan, M. K., Sumihama, M., Sumiyoshi, T., Summers, D. J., Sun, L., Sun, S., Sundermann, J. E., Sung, H. F., Susaki, Y., Sutcliffe, P., Suzuki, A., Suzuki, J., Suzuki, J. I., Suzuki, K., Suzuki, S., Suzuki, S. Y., Swain, J. E., Swain, S. K., T'Jampens, S., Tabata, M., Tackmann, K., Tajima, H., Tajima, O., Takahashi, K., Takahashi, S., Takahashi, T., Takasaki, F., Takayama, T., Takita, M., Tamai, K., Tamponi, U., Tamura, N., Tan, N., Tan, P., Tanabe, K., Tanabe, T., Tanaka, H. A., Tanaka, J., Tanaka, M., Tanaka, S., Tanaka, Y., Tanida, K., Taniguchi, N., Taras, P., Tasneem, N., Tatishvili, G., Tatomi, T., Tawada, M., Taylor, F., Taylor, G. N., Taylor, G. P., Telnov, V. I., Teodorescu, L., Ter-Antonyan, R., Teramoto, Y., Teytelman, D., Thérin, G., Thiebaux, Ch., Thiessen, D., Thomas, E. W., Thompson, J. M., Thorne, F., Tian, X. C., Tibbetts, M., Tikhomirov, I., Tinslay, J. S., Tiozzo, G., Tisserand, V., Tocut, V., Toki, W. H., Tomassini, E. W., Tomoto, M., Tomura, T., Torassa, E., Torrence, E., Tosi, S., Touramanis, C., Toussaint, J. C., Tovey, S. N., Trapani, P. P., Treadwell, E., Triggiani, G., Trincaz-Duvoid, S., Trischuk, W., Troost, D., Trunov, A., Tsai, K. L., Tsai, Y. T., Tsujita, Y., Tsukada, K., Tsukamoto, T., Tuggle, J. M., Tumanov, A., Tung, Y. W., Turnbull, L., Turner, J., Turri, M., Uchida, K., Uchida, M., Uchida, Y., Ueki, M., Ueno, K., Ujiie, N., Ulmer, K. A., Unno, Y., Urquijo, P., Ushiroda, Y., Usov, Y., Usseglio, M., Usuki, Y., Uwer, U., Va'vra, J., Vahsen, S. E., Vaitsas, G., Valassi, A., Vallazza, E., Vallereau, A., Vanhoefer, P., van Hoek, W. C., Van Hulse, C., van Winkle, D., Varner, G., Varnes, E. W., Varvell, K. E., Vasileiadis, G., Velikzhanin, Y. S., Verderi, M., Versillé, S., Vervink, K., Viaud, B., Vidal, P. B., Villa, S., Villanueva-Perez, P., Vinograd, E. L., Vitale, L., Vitug, G. M., Voß, C., Voci, C., Voena, C., Volk, A., von Wimmersperg-Toeller, J. H., Vorobyev, V., Vossen, A., Vuagnin, G., Vuosalo, C. O., Wacker, K., Wagner, A. P., Wagner, D. L., Wagner, G., Wagner, M. N., Wagner, S. R., Wagoner, D. E., Walker, D., Walkowiak, W., Wallom, D., Wang, C. C., Wang, C. H., Wang, J., Wang, J. G., Wang, K., Wang, L., Wang, L. L., Wang, P., Wang, T. J., Wang, W. F., Wang, X. L., Wang, Y. F., Wappler, F. R., Watanabe, M., Watson, A. T., Watson, J. E., Watson, N. K., Watt, M., Weatherall, J. H., Weaver, M., Weber, T., Wedd, R., Wei, J. T., Weidemann, A. W., Weinstein, A. J. R., Wenzel, W. A., West, C. A., West, C. G., West, T. J., White, E., White, R. M., Wicht, J., Widhalm, L., Wiechczynski, J., Wienands, U., Wilden, L., Wilder, M., Williams, D. C., Williams, G., Williams, J. C., Williams, K. M., Williams, M. I., Willocq, S. Y., Wilson, J. R., Wilson, M. G., Wilson, R. J., Winklmeier, F., Winstrom, L. O., Winter, M. A., Wisniewski, W. J., Wittgen, M., Wittlin, J., Wittmer, W., Wixted, R., Woch, A., Wogsland, B. J., Wong, Q. K., Wray, B. C., Wren, A. C., Wright, D. M., Wu, C. H., Wu, J., Wu, S. L., Wulsin, H. W., Xella, S. M., Xie, Q. L., Xie, Y., Xu, Z. Z., Yèche, Ch., Yamada, Y., Yamaga, M., Yamaguchi, A., Yamaguchi, H., Yamaki, T., Yamamoto, H., Yamamoto, N., Yamamoto, R. K., Yamamoto, S., Yamanaka, T., Yamaoka, H., Yamaoka, J., Yamaoka, Y., Yamashita, Y., Yamauchi, M., Yan, D. S., Yan, Y., Yanai, H., Yanaka, S., Yang, H., Yang, R., Yang, S., Yarritu, A. K., Yashchenko, S., Yashima, J., Yasin, Z., Yasu, Y., Ye, S. W., Yeh, P., Yi, J. I., Yi, K., Yi, M., Yin, Z. W., Ying, J., Yocky, G., Yokoyama, K., Yokoyama, M., Yokoyama, T., Yoshida, K., Yoshida, M., Yoshimura, Y., Young, C. C., Yu, C. X., Yu, Z., Yuan, C. Z., Yuan, Y., Yumiceva, F. X., Yusa, Y., Yushkov, A. N., Yuta, H., Zacek, V., Zain, S. B., Zallo, A., Zambito, S., Zander, D., Zang, S. L., Zanin, D., Zaslavsky, B. G., Zeng, Q. L., Zghiche, A., Zhang, B., Zhang, J., Zhang, L., Zhang, L. M., Zhang, S. Q., Zhang, Z. P., Zhao, H. W., Zhao, M., Zhao, Z. G., Zheng, Y., Zheng, Y. H., Zheng, Z. P., Zhilich, V., Zhou, P., Zhu, R. Y., Zhu, Y. S., Zhu, Z. M., Zhulanov, V., Ziegler, T., Ziegler, V., Zioulas, G., Zisman, M., Zito, M., Zürcher, D., Zwahlen, N., Zyukova, O., Živko, T., and Žontar, D.

Subjects
High Energy Physics - Experiment, High Energy Physics - Phenomenology
Abstract

This work is on the Physics of the B Factories. Part A of this book contains a brief description of the SLAC and KEK B Factories as well as their detectors, BaBar and Belle, and data taking related issues. Part B discusses tools and methods used by the experiments in order to obtain results. The results themselves can be found in Part C. Please note that version 3 on the archive is the auxiliary version of the Physics of the B Factories book. This uses the notation alpha, beta, gamma for the angles of the Unitarity Triangle. The nominal version uses the notation phi_1, phi_2 and phi_3. Please cite this work as Eur. Phys. J. C74 (2014) 3026., Comment: 928 pages, version 3 (arXiv:1406.6311v3) corresponds to the alpha, beta, gamma version of the book, the other versions use the phi1, phi2, phi3 notation

Published
2014
Full Text
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39. Search for Low-Mass WIMPs with SuperCDMS

Author

Agnese, R., Anderson, A. J., Asai, M., Balakishiyeva, D., Thakur, R. Basu, Bauer, D. A., Beaty, J., Billard, J., Borgland, A., Bowles, M. A., Brandt, D., Brink, P. L., Bunker, R., Cabrera, B., Caldwell, D. O., Cerdeno, D. G., Chagani, H., Chen, Y., Cherry, M., Cooley, J., Cornell, B., Crewdson, C. H., Cushman, P., Daal, M., DeVaney, D., Di Stefano, P. C. F., Silva, E. Do Couto E, Doughty, T., Esteban, L., Fallows, S., Figueroa-Feliciano, E., Godfrey, G. L., Golwala, S. R., Hall, J., Hansen, S., Harris, H. R., Hertel, S. A., Hines, B. A., Hofer, T., Holmgren, D., Hsu, L., Huber, M. E., Jastram, A., Kamaev, O., Kara, B., Kelsey, M. H., Kenany, S., Kennedy, A., Kiveni, M., Koch, K., Leder, A., Loer, B., Asamar, E. Lopez, Mahapatra, R., Mandic, V., Martinez, C., McCarthy, K. A., Mirabolfathi, N., Moffatt, R. A., Nelson, R. H., Novak, L., Page, K., Partridge, R., Pepin, M., Phipps, A., Platt, M., Prasad, K., Pyle, M., Qiu, H., Rau, W., Redl, P., Reisetter, A., Resch, R. W., Ricci, Y., Ruschman, M., Saab, T., Sadoulet, B., Sander, J., Schmitt, R. L., Schneck, K., Schnee, R. W., Scorza, S., Seitz, D. N., Serfass, B., Shank, B., Speller, D., Tomada, A., Upadhyayula, S., Villano, A. N., Welliver, B., Wright, D. H., Yellin, S., Yen, J. J., Young, B. A., and Zhang, J.

Subjects
High Energy Physics - Experiment, Astrophysics - Cosmology and Nongalactic Astrophysics, Physics - Instrumentation and Detectors
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/c2, 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 1.2e-42 cm2 at 8 GeV/c2. 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/c2., Comment: 6 pages, 4 figures; figure 1 updated, submitted to Phys. Rev. Lett

Published
2014
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41. Improved WIMP-search reach of the CDMS II germanium data

Author

Agnese, R, Anderson, AJ, Asai, M, Balakishiyeva, D, Barker, D, Basu Thakur, R, Bauer, DA, Billard, J, Borgland, A, Bowles, MA, Brandt, D, Brink, PL, Bunker, R, Cabrera, B, Caldwell, DO, Calkins, R, Cerdeño, DG, Chagani, H, Chen, Y, Cooley, J, Cornell, B, Crewdson, CH, Cushman, P, Daal, M, Di Stefano, PCF, Doughty, T, Esteban, L, Fallows, S, Figueroa-Feliciano, E, Godfrey, GL, Golwala, SR, Hall, J, Harris, HR, Hertel, SA, Hofer, T, Holmgren, D, Hsu, L, Huber, ME, Jardin, D, Jastram, A, Kamaev, O, Kara, B, Kelsey, MH, Kennedy, A, Kiveni, M, Koch, K, Leder, A, Loer, B, Lopez Asamar, E, Lukens, P, Mahapatra, R, Mandic, V, McCarthy, KA, Mirabolfathi, N, Moffatt, RA, Oser, SM, Page, K, Page, WA, Partridge, R, Pepin, M, Phipps, A, Prasad, K, Pyle, M, Qiu, H, Rau, W, Redl, P, Reisetter, A, Ricci, Y, Rogers, HE, Saab, T, Sadoulet, B, Sander, J, Schneck, K, Schnee, RW, Scorza, S, Serfass, B, Shank, B, Speller, D, Toback, D, Upadhyayula, S, Villano, AN, Welliver, B, Wilson, JS, Wright, DH, Yang, X, Yellin, S, Yen, JJ, Young, BA, and Zhang, J

Subjects
hep-ex, astro-ph.CO, Nuclear & Particles Physics, Astronomical and Space Sciences, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Quantum Physics, Atomic, Molecular, Nuclear, Particle and Plasma Physics
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.

Published
2015

42. Dark matter effective field theory scattering in direct detection experiments

Author

Schneck, K, Cabrera, B, Cerdeño, DG, Mandic, V, Rogers, HE, Agnese, R, Anderson, AJ, Asai, M, Balakishiyeva, D, Barker, D, Basu Thakur, R, Bauer, DA, Billard, J, Borgland, A, Brandt, D, Brink, PL, Bunker, R, Caldwell, DO, Calkins, R, Chagani, H, Chen, Y, Cooley, J, Cornell, B, Crewdson, CH, Cushman, P, Daal, M, Di Stefano, PCF, Doughty, T, Esteban, L, Fallows, S, Figueroa-Feliciano, E, Godfrey, GL, Golwala, SR, Hall, J, Harris, HR, Hofer, T, Holmgren, D, Hsu, L, Huber, ME, Jardin, DM, Jastram, A, Kamaev, O, Kara, B, Kelsey, MH, Kennedy, A, Leder, A, Loer, B, Lopez Asamar, E, Lukens, P, Mahapatra, R, Mccarthy, KA, Mirabolfathi, N, Moffatt, RA, Morales Mendoza, JD, Oser, SM, Page, K, Page, WA, Partridge, R, Pepin, M, Phipps, A, Prasad, K, Pyle, M, Qiu, H, Rau, W, Redl, P, Reisetter, A, Ricci, Y, Roberts, A, Saab, T, Sadoulet, B, Sander, J, Schnee, RW, Scorza, S, Serfass, B, Shank, B, Speller, D, Toback, D, Upadhyayula, S, Villano, AN, Welliver, B, Wilson, JS, Wright, DH, Yang, X, Yellin, S, Yen, JJ, Young, BA, and Zhang, J

Subjects
astro-ph.CO, hep-ex, hep-ph, Nuclear & Particles Physics, Astronomical and Space Sciences, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Quantum Physics, Atomic, Molecular, Nuclear, Particle and Plasma Physics
Abstract

We examine the consequences of the effective field theory (EFT) of dark matter-nucleon scattering for current and proposed direct detection experiments. Exclusion limits on EFT coupling constants computed using the optimum interval method are presented for SuperCDMS Soudan, CDMS II, and LUX, and the necessity of combining results from multiple experiments in order to determine dark matter parameters is discussed. We demonstrate that spectral differences between the standard dark matter model and a general EFT interaction can produce a bias when calculating exclusion limits and when developing signal models for likelihood and machine learning techniques. We also discuss the implications of the EFT for the next-generation (G2) direct detection experiments and point out regions of complementarity in the EFT parameter space.

Published
2015

43. Maximum likelihood analysis of low energy CDMS II germanium data

Author

Agnese, R, Anderson, AJ, Balakishiyeva, D, Basu Thakur, R, Bauer, DA, Billard, J, Borgland, A, Bowles, MA, Brandt, D, Brink, PL, Bunker, R, Cabrera, B, Caldwell, DO, Cerdeno, DG, Chagani, H, Chen, Y, Cooley, J, Cornell, B, Crewdson, CH, Cushman, P, Daal, M, Di Stefano, PCF, Doughty, T, Esteban, L, Fallows, S, Figueroa-Feliciano, E, Fritts, M, Godfrey, GL, Golwala, SR, Graham, M, Hall, J, Harris, HR, Hertel, SA, Hofer, T, Holmgren, D, Hsu, L, Huber, ME, Jastram, A, Kamaev, O, Kara, B, Kelsey, MH, Kennedy, A, Kiveni, M, Koch, K, Leder, A, Loer, B, Lopez Asamar, E, Mahapatra, R, Mandic, V, Martinez, C, McCarthy, KA, Mirabolfathi, N, Moffatt, RA, Moore, DC, Nelson, RH, Oser, SM, Page, K, Page, WA, Partridge, R, Pepin, M, Phipps, A, Prasad, K, Pyle, M, Qiu, H, Rau, W, Redl, P, Reisetter, A, Ricci, Y, Rogers, HE, Saab, T, Sadoulet, B, Sander, J, Schneck, K, Schnee, RW, Scorza, S, Serfass, B, Shank, B, Speller, D, Upadhyayula, S, Villano, AN, Welliver, B, Wright, DH, Yellin, S, Yen, JJ, Young, BA, and Zhang, J

Subjects
astro-ph.CO, astro-ph.IM, physics.ins-det, Nuclear & Particles Physics, Astronomical and Space Sciences, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Quantum Physics, Atomic, Molecular, Nuclear, Particle and Plasma Physics
Abstract

We report on the results of a search for a Weakly Interacting Massive Particle (WIMP) signal in low-energy data of the Cryogenic Dark Matter Search experiment using a maximum likelihood analysis. A background model is constructed using geant4 to simulate the surface-event background from Pb210 decay-chain events, while using independent calibration data to model the gamma background. Fitting this background model to the data results in no statistically significant WIMP component. In addition, we perform fits using an analytic ad hoc background model proposed by Collar and Fields, who claimed to find a large excess of signal-like events in our data. We confirm the strong preference for a signal hypothesis in their analysis under these assumptions, but excesses are observed in both single- and multiple-scatter events, which implies the signal is not caused by WIMPs, but rather reflects the inadequacy of their background model.

Published
2015

44. First direct limits on lightly ionizing particles with electric charge less than e/6.

Author

Agnese, R, Anderson, AJ, Balakishiyeva, D, Basu Thakur, R, Bauer, DA, Billard, J, Borgland, A, Bowles, MA, Brandt, D, Brink, PL, Bunker, R, Cabrera, B, Caldwell, DO, Cerdeno, DG, Chagani, H, Chen, Y, Cooley, J, Cornell, B, Crewdson, CH, Cushman, P, Daal, M, Di Stefano, PCF, Doughty, T, Esteban, L, Fallows, S, Figueroa-Feliciano, E, Godfrey, GL, Golwala, SR, Hall, J, Harris, HR, Hertel, SA, Hofer, T, Holmgren, D, Hsu, L, Huber, ME, Jastram, A, Kamaev, O, Kara, B, Kelsey, MH, Kennedy, A, Kiveni, M, Koch, K, Leder, A, Loer, B, Lopez Asamar, E, Mahapatra, R, Mandic, V, Martinez, C, McCarthy, KA, Mirabolfathi, N, Moffatt, RA, Moore, DC, Nelson, H, Nelson, RH, Ogburn, RW, Page, K, Page, WA, Partridge, R, Pepin, M, Phipps, A, Prasad, K, Pyle, M, Qiu, H, Rau, W, Redl, P, Reisetter, A, Ricci, Y, Rogers, HE, Saab, T, Sadoulet, B, Sander, J, Schneck, K, Schnee, RW, Scorza, S, Serfass, B, Shank, B, Speller, D, Upadhyayula, S, Villano, AN, Welliver, B, Wright, DH, Yellin, S, Yen, JJ, Young, BA, Zhang, J, and CDMS Collaboration

Subjects
CDMS Collaboration, hep-ex, astro-ph.CO, astro-ph.HE, physics.ins-det, General Physics, Physical Sciences
Abstract

While the standard model of particle physics does not include free particles with fractional charge, experimental searches have not ruled out their existence. We report results from the Cryogenic Dark Matter Search (CDMS II) experiment that give the first direct-detection limits for cosmogenically produced relativistic particles with electric charge lower than e/6. A search for tracks in the six stacked detectors of each of two of the CDMS II towers finds no candidates, thereby excluding new parameter space for particles with electric charges between e/6 and e/200.

Published
2015

45. CDMSlite: A Search for Low-Mass WIMPs using Voltage-Assisted Calorimetric Ionization Detection in the SuperCDMS Experiment

Author

Agnese, R., Anderson, A. J., Asai, M., Balakishiyeva, D., Thakur, R. Basu, Bauer, D. A., Billard, J., Borgland, A., Bowles, M. A., Brandt, D., Brink, P. L., Bunker, R., Cabrera, B., Caldwell, D. O., Cerdeno, D. G., Chagani, H., 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., Jastram, A., Kamaev, O., Kara, B., Kelsey, M. H., Kennedy, A., Kiveni, M., Koch, K., Loer, B., Asamar, E. Lopez, Mahapatra, R., Mandic, V., Martinez, C., McCarthy, K. A., Mirabolfathi, N., Moffatt, R. A., Moore, D. C., Nadeau, P., Nelson, R. H., Page, K., Partridge, R., Pepin, M., Phipps, A., Prasad, K., Pyle, M., Qiu, H., Rau, W., Redl, P., Reisetter, A., Ricci, Y., Saab, T., Sadoulet, B., Sander, J., Schneck, K., Schnee, R. W., Scorza, S., Serfass, B., Shank, B., Speller, D., Villano, A. N., Welliver, B., Wright, D. H., Yellin, S., Yen, J. J., Young, B. A., and Zhang, J.

Subjects
Physics - Instrumentation and Detectors, Astrophysics - Cosmology and Extragalactic Astrophysics, Astrophysics - Instrumentation and Methods for Astrophysics, High Energy Physics - Experiment
Abstract

SuperCDMS is an experiment designed to directly detect Weakly Interacting Massive Particles (WIMPs), a favored candidate for dark matter ubiquitous in the Universe. In this paper, we present WIMP-search results using a calorimetric technique we call CDMSlite, which relies on voltage- assisted Luke-Neganov amplification of the ionization energy deposited by particle interactions. The data were collected with a single 0.6 kg germanium detector running for 10 live days at the Soudan Underground Laboratory. A low energy threshold of 170 eVee (electron equivalent) was obtained, which allows us to constrain new WIMP-nucleon spin-independent parameter space for WIMP masses below 6 GeV/c2., Comment: 7 pages, 4 figures

Published
2013
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46. Demonstration of Surface Electron Rejection with Interleaved Germanium Detectors for Dark Matter Searches

Author

Agnese, R., Anderson, A. J., Balakishiyeva, D., Thakur, R. Basu, Bauer, D. A., Borgland, A., Brandt, D., Brink, P. L., Bunker, R., Cabrera, B., Caldwell, D. O., Cerdeno, D. G., Chagani, H., Cherry, M., Cooley, J., Cornell, B., Crewdson, C. H., Cushman, P., Daal, M., Di Stefano, P. C. F., Silva, E. Do Couto E, Doughty, T., Esteban, L., Fallows, S., Figueroa-Feliciano, E., Fox, J., Fritts, M., Godfrey, G. L., Golwala, S. R., Hall, J., Harris, H. R., Hasi, J., Hertel, S. A., Hines, B. A., Hofer, T., Holmgren, D., Hsu, L., Huber, M. E., Jastram, A., Kamaev, O., Kara, B., Kelsey, M. H., Kenany, S. A., Kennedy, A., Kenney, C. J., Kiveni, M., Koch, K., Loer, B., Asamar, E. Lopez, Mahapatra, R., Mandic, V., Martinez, C., McCarthy, K. A., Mirabolfathi, N., Moffatt, R. A., Moore, D. C., Nadeau, P., Nelson, R. H., Novak, L., Page, K., Partridge, R., Pepin, M., Phipps, A., Prasad, K., Pyle, M., Qiu, H., Radpour, R., Rau, W., Redl, P., Reisetter, A., Resch, R. W., Ricci, Y., Saab, T., Sadoulet, B., Sander, J., Schmitt, R., Schneck, K., Schnee, R. W., Scorza, S., Seitz, D., Serfass, B., Shank, B., Speller, D., Tomada, A., Villano, A. N., Welliver, B., Wright, D. H., Yellin, S., Yen, J. J., Young, B. A., and Zhang, J.

Subjects
Physics - Instrumentation and Detectors, Astrophysics - Astrophysics of Galaxies, High Energy Physics - Experiment
Abstract

The SuperCDMS experiment in the Soudan Underground Laboratory searches for dark matter with a 9-kg array of cryogenic germanium detectors. Symmetric sensors on opposite sides measure both charge and phonons from each particle interaction, providing excellent discrimination between electron and nuclear recoils, and between surface and interior events. Surface event rejection capabilities were tested with two $^{210}$Pb sources producing $\sim$130 beta decays/hr. In $\sim$800 live hours, no events leaked into the 8--115 keV signal region, giving upper limit leakage fraction $1.7 \times 10^{-5}$ at 90% C.L., corresponding to $< 0.6$ surface event background in the future 200-kg SuperCDMS SNOLAB experiment., Comment: 5 pages, 4 figures, submitted to journal

Published
2013
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47. Silicon Detector Dark Matter Results from the Final Exposure of CDMS II

Author

CDMS Collaboration, Agnese, R., Ahmed, Z., Anderson, A. J., Arrenberg, S., Balakishiyeva, D., Thakur, R. Basu, Bauer, D. A., Billard, J., Borgland, A., Brandt, D., Brink, P. L., Bruch, T., Bunker, R., Cabrera, B., Caldwell, D. O., Cerdeno, D. G., Chagani, H., Cooley, J., Cornell, B., Crewdson, C. H., Cushman, P., Daal, M., Dejongh, F., Silva, E. Do Couto E, Doughty, T., Esteban, L., Fallows, S., Figueroa-Feliciano, E., Filippini, J., Fox, J., Fritts, M., Godfrey, G. L., Golwala, S. R., Hall, J., Harris, R. H., Hertel, S. A., Hofer, T., Holmgren, D., Hsu, L., Huber, M. E., Jastram, A., Kamaev, O., Kara, B., Kelsey, M. H., Kennedy, A., Kim, P., Kiveni, M., Koch, K., Kos, M., Leman, S. W., Loer, B., Asamar, E. Lopez, Mahapatra, R., Mandic, V., Martinez, C., McCarthy, K. A., Mirabolfathi, N., Moffatt, R. A., Moore, D. C., Nadeau, P., Nelson, R. H., Page, K., Partridge, R., Pepin, M., Phipps, A., Prasad, K., Pyle, M., Qiu, H., Rau, W., Redl, P., Reisetter, A., Ricci, Y., Saab, T., Sadoulet, B., Sander, J., Schneck, K., Schnee, R. W., Scorza, S., Serfass, B., Shank, B., Speller, D., Sundqvist, K. M., Villano, A. N., Welliver, B., Wright, D. H., Yellin, S., Yen, J. J., Yoo, J., Young, B. A., and Zhang, J.

Subjects
High Energy Physics - Experiment, Astrophysics - Cosmology and Extragalactic Astrophysics, Astrophysics - Instrumentation and Methods for Astrophysics, Physics - Instrumentation and Detectors
Abstract

We report results of a search for Weakly Interacting Massive Particles (WIMPS) with the silicon detectors of the CDMS II experiment. This blind analysis of 140.2 kg-days of data taken between July 2007 and September 2008 revealed three WIMP-candidate events with a surface-event background estimate of 0.41^{+0.20}_{-0.08}(stat.)^{+0.28}_{-0.24}(syst.). Other known backgrounds from neutrons and 206Pb are limited to < 0.13 and <0.08 events at the 90% confidence level, respectively. The exposure of this analysis is equivalent to 23.4 kg-days for a recoil energy range of 7-100 keV for a WIMP of mass 10 GeV/c2. The probability that the known backgrounds would produce three or more events in the signal region is 5.4%. A profile likelihood ratio test of the three events that includes the measured recoil energies gives a 0.19% probability for the known-background-only hypothesis when tested against the alternative WIMP+background hypothesis. The highest likelihood occurs for a WIMP mass of 8.6 GeV/c2 and WIMP-nucleon cross section of 1.9e-41 cm2., Comment: 5 pages, 4 figures, as accepted by PRL

Published
2013

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

Author

CDMS Collaboration, Agnese, R., Ahmed, Z., Anderson, A. J., Arrenberg, S., Balakishiyeva, D., Thakur, R. Basu, Bauer, D. A., Borgland, A., Brandt, D., Brink, P. L., Bruch, T., Bunker, R., Cabrera, B., Caldwell, D. O., Cerdeno, D. G., Chagani, H., Cooley, J., Cornell, B., Crewdson, C. H., Cushman, P., Daal, M., Dejongh, F., Di Stefano, P. C. F., Silva, E. do Couto e, Doughty, T., Esteban, L., Fallows, S., Figueroa-Feliciano, E., Filippini, J., Fox, J., Fritts, M., Godfrey, G. L., Golwala, S. R., Hall, J., Harris, R. H., Hertel, S. A., Hofer, T., Holmgren, D., Hsu, L., Huber, M. E., Jastram, A., Kamaev, O., Kara, B., Kelsey, M. H., Kennedy, A., Kim, P., Kiveni, M., Koch, K., Kos, M., Leman, S. W., Lopez-Asamar, E., Mahapatra, R., Mandic, V., Martinez, C., McCarthy, K. A., Mirabolfathi, N., Moffatt, R. A., Moore, D. C., Nadeau, P., Nelson, R. H., Page, K., Partridge, R., Pepin, M., Phipps, A., Prasad, K., Pyle, M., Qiu, H., Rau, W., Redl, P., Reisetter, A., Ricci, Y., Saab, T., Sadoulet, B., Sander, J., Schneck, K., Schnee, R. W., Scorza, S., Serfass, B., Shank, B., Speller, D., Sundqvist, K. M., Villano, A. N., Welliver, B., Wright, D. H., Yellin, S., Yen, J. J., Yoo, J., Young, B. A., and Zhan, J.

Subjects
Astrophysics - Cosmology and Extragalactic Astrophysics, High Energy Physics - Experiment
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., Comment: 5 pages, 4 figures; updated to match published version

Published
2013
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49. Production rate measurement of Tritium and other cosmogenic isotopes in Germanium with CDMSlite

Author

Agnese, R., Aralis, T., Aramaki, T., Arnquist, I.J., Azadbakht, E., Baker, W., Banik, S., Barker, D., Bauer, D.A., Binder, T., Bowles, M.A., Brink, P.L., Bunker, R., Cabrera, B., Calkins, R., Cartaro, C., Cerdeño, D.G., Chang, Y.-Y., Cooley, J., Cornell, B., Cushman, P., Doughty, T., Fascione, E., Figueroa-Feliciano, E., Fink, C.W., Fritts, M., Gerbier, G., Germond, R., Ghaith, M., Golwala, S.R., Harris, H.R., Hong, Z., Hoppe, E.W., Hsu, L., Huber, M.E., Iyer, V., Jardin, D., Jastram, A., Jena, C., Kelsey, M.H., Kennedy, A., Kubik, A., Kurinsky, N.A., Lawrence, R.E., Loer, B., Lopez Asamar, E., Lukens, P., MacDonell, D., Mahapatra, R., Mandic, V., Mast, N., Miller, E., Mirabolfathi, N., Mohanty, B., Morales Mendoza, J.D., Nelson, J., Orrell, J.L., Oser, S.M., Page, W.A., Partridge, R., Pepin, M., Ponce, F., Poudel, S., Pyle, M., Qiu, H., Rau, W., Reisetter, A., Ren, R., Reynolds, T., Roberts, A., Robinson, A.E., Rogers, H.E., Saab, T., Sadoulet, B., Sander, J., Scarff, A., Schnee, R.W., Scorza, S., Senapati, K., Serfass, B., Speller, D., Stein, M., Street, J., Tanaka, H.A., Toback, D., Underwood, R., Villano, A.N., von Krosigk, B., Watkins, S.L., Wilson, J.S., Wilson, M.J., Winchell, J., Wright, D.H., Yellin, S., Young, B.A., Zhang, X., and Zhao, X.

Published
2019
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50. Search for annual modulation in low-energy CDMS-II data

Author

CDMS Collaboration, Ahmed, Z., Akerib, D. S., Anderson, A. J., Arrenberg, S., Bailey, C. N., Balakishiyeva, D., Baudis, L., Bauer, D. A., Brink, P. L., Bruch, T., Bunker, R., Cabrera, B., Caldwell, D. O., Cooley, J., Cushman, P., Daal, M., DeJongh, F., Di Stefano, P. C. F., Dragowsky, M. R., Fallows, S., Figueroa-Feliciano, E., Filippini, J., Fox, J., Fritts, M., Golwala, S. R., Hall, J., Hertel, S. A., Hofer, T., Holmgren, D., Hsu, L., Huber, M. E., Kamaev, O., Kiveni, M., Kos, M., Leman, S. W., Liu, S., Mahapatra, R., Mandic, V., McCarthy, K. A., Mirabolfathi, N., Moore, D. C., Nelson, H., Ogburn, R. W., Phipps, A., Prasad, K., Pyle, M., Qiu, X., Rau, W., Reisetter, A., Ricci, Y., Saab, T., Sadoulet, B., Sander, J., Schnee, R. W., Seitz, D., Serfass, B., Speller, D., Sundqvist, K. M., Tarka, M., Thakur, R. B., Villano, A. N., Welliver, B., Yellin, S., Yoo, J., Young, B. A., and Zhang, J.

Subjects
Astrophysics - Cosmology and Extragalactic Astrophysics, High Energy Physics - Experiment
Abstract

We report limits on annual modulation of the low-energy event rate from the Cryogenic Dark Matter Search (CDMS II) experiment at the Soudan Underground Laboratory. Such a modulation could be produced by interactions from Weakly Interacting Massive Particles (WIMPs) with masses ~10 GeV/c^2. We find no evidence for annual modulation in the event rate of veto-anticoincident single-detector interactions consistent with nuclear recoils, and constrain the magnitude of any modulation to <0.06 event [keVnr kg day]^-1 in the 5-11.9 keVnr energy range at the 99% confidence level. These results disfavor an explanation for the reported modulation in the 1.2-3.2 keVee energy range in CoGeNT in terms of nuclear recoils resulting from elastic scattering of WIMPs at >98% confidence. For events consistent with electron recoils, no significant modulation is observed for either single- or multiple-detector interactions in the 3.0-7.4 keVee range., Comment: 5 pages, plus 8 pages supplementary materials

Published
2012

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