Search

Your search keyword '"Fritts, M."' showing total 31 results
Start Over Author "Fritts, M." Topic high energy physics - experiment
31 results on '"Fritts, M."'

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. Strategies for Machine Learning Applied to Noisy HEP Datasets: Modular Solid State Detectors from SuperCDMS

Author

Cushman, P. B., Fritts, M. C., Chambers, A. D., Roy, A., and Li, T.

Subjects
High Energy Physics - Experiment
Abstract

Background reduction in the SuperCDMS dark matter experiment depends on removing surface events within individual detectors by identifying the location of each incident particle interaction. Position reconstruction is achieved by combining pulse shape information over multiple phonon channels, a task well-suited to machine learning techniques. Data from an Am-241 scan of a SuperCDMS SNOLAB detector was used to study a selection of statistical approaches, including linear regression, artificial neural networks, and symbolic regression. Our results showed that simpler linear regression models were better able than artificial neural networks to generalize on such a noisy and minimal data set, but there are indications that certain architectures and training configurations can counter overfitting tendencies. This study will be repeated on a more complete SuperCDMS data set (in progress) to explore the interplay between data quality and the application of neural networks., Comment: 27 pages, 16 figures. To be submitted to PhysRevD

Published
2024

3. Exploring Charge Transport Dynamics in a Cryogenic P-Type Germanium Detector

Author

Acharya, P., Fritts, M., Mei, D. -M., Wang, G. -J., Mahapatra, R., and Platt, M.

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

This study explores the dynamics of charge transport within a cryogenic P-type Ge particle detector, fabricated from a crystal cultivated at the University of South Dakota (USD). By subjecting the detector to cryogenic temperatures and an Am-241 source, we observe evolving charge dynamics and the emergence of cluster dipole states, leading to the impact ionization process at 40 mK. Our analysis focuses on crucial parameters: the zero-field cross-section of cluster dipole states and the binding energy of these states. For the Ge detector in our investigation, the zero-field cross-section of cluster dipole states is determined to be $8.45 \times 10^{-11}\pm 4.22\times 10^{-12}~cm^2$. Examination of the binding energy associated with cluster dipole states, formed by charge trapping onto dipole states during the freeze-out process, reveals a value of $0.034 \pm 0.0017$ meV. These findings shed light on the intricate charge states influenced by the interplay of temperature and electric field, with potential implications for the sensitivity in detecting low-mass dark matter., Comment: 11 pages and 12 figures

Published
2024

4. 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
Full Text
View/download PDF

5. 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
Full Text
View/download PDF

6. Observation of Time-Dependent Internal Charge Amplification in a Planar Germanium Detector at Cryogenic Temperature

Author

Acharya, P., Fritts, M., Mei, D. -M., Mandic, V., Wang, G. -J., Mahapatra, R., and Platt, M.

Subjects
Physics - Instrumentation and Detectors, Condensed Matter - Materials Science, High Energy Physics - Experiment, Nuclear Experiment
Abstract

For the first time, time-dependent internal charge amplification through impact ionization has been observed in a planar germanium (Ge) detector operated at cryogenic temperature. In a time period of 30 and 45 minutes after applying a bias voltage, the charge energy corresponding to a baseline of the 59.54 keV $\gamma$ rays from a $^{241}$Am source is amplified for a short period of time and then decreases back to the baseline. The amplification of charge energy depends strongly on the applied positive bias voltage with drifting holes across the detector. No such phenomenon is visible with drifting electrons across the detector. We find that the observed charge amplification is dictated by the impact ionization of charged states, which has a strong correlation with impurity level and applied electric field. We analyze the dominant physics mechanisms that are responsible for the creation and the impact ionization of charged states. Our analysis suggests that the appropriate level of impurity in a Ge detector can enhance charge yield through the impact ionization of charged states to achieve extremely low-energy detection threshold ($<$ 10 meV) for MeV-scale dark matter searches if the charge amplification can be stabilized., Comment: 7 pages and 9 figures

Published
2022
Full Text
View/download PDF

7. 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

8. 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
Full Text
View/download PDF

9. 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

10. First observation of isolated nuclear recoils following neutron capture for dark matter calibration

Author

Villano, A. N., Fritts, M., Mast, N., Brown, S., Cushman, P., Harris, K., and Mandic, V.

Subjects
Nuclear Experiment, High Energy Physics - Experiment
Abstract

Low-energy nuclear recoils (NRs) are hard to measure because they produce few e$^{-}$/h$^+$ pairs in solids -- i.e. they have low "ionization yield". A silicon detector was exposed to thermal neutrons over 2.5\,live-days, probing NRs down to 450\,eV. The observation of a neutron capture-induced component of NRs at low energies is supported by the much-improved fit upon inclusion of a capture NR model. This result shows that thermal neutron calibration of very low recoil energy NRs is promising for dark matter searches, coherent neutrino experiments, and improving understanding of ionization dynamics in solids., Comment: 10 pages, 6 figures, 1 table

Published
2021
Full Text
View/download PDF

11. 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
Full Text
View/download PDF

12. 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
Full Text
View/download PDF

13. 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
Full Text
View/download PDF

14. An In-Situ Movable Calibration Source for Cryogenic Particle Detectors

Author

Mast, N., Fritts, M., Sincavage, D., Cushman, P., and Mandic, V.

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

A prototype device capable of moving a radioactive calibration source to multiple positions was operated at millikelvin temperatures using a modified commercial stepper motor. It was developed as an in-situ calibration strategy for cryogenic dark matter detectors. Data taken by scanning a calibration source across multiple radial positions of a prototype dark matter detector demonstrated its functionality. Construction, heat load, and operation of the device are discussed, as is the effect of the motor on the detector operation. A sample dataset taken over multiple positions of a SuperCDMS detector is presented as an example of the utility of such a device., Comment: 5 pages, 4 figures

Published
2020
Full Text
View/download PDF

15. Constraints on dark photons and axion-like particles from SuperCDMS Soudan

Author

SuperCDMS Collaboration, Aralis, T., Aramaki, T., Arnquist, I. J., Azadbakht, E., Baker, W., 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., Cooley, J., Coombes, H., Corbett, J., Cornell, B., 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., Kennedy, A., 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., Michaud, É. M., Michielin, E., Mirabolfathi, N., Mohanty, B., Mendoza, J. D. Morales, Nagorny, S., Nelson, J., Neog, H., Orrell, J. L., Oser, S. M., Page, W. A., Pakarha, P., Partridge, R., Podviianiuk, R., Ponce, F., Poudel, S., Pyle, M., Rau, W., Ren, R., Reynolds, T., Roberts, A., Robinson, A. E., Rogers, H. E., Saab, T., Sadoulet, B., Sander, 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., Zhao, X., and Zheng, L.

Subjects
High Energy Physics - Experiment, Physics - Instrumentation and Detectors
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 axion-like 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/$c^2$ to 500 eV/$c^2$ for both candidates, excluding previously untested parameter space for masses below ~1 keV/$c^2$. For the kinetic mixing of dark photons, values below $10^{-15}$ are reached for particle masses around 100 eV/$c^2$; for the axioelectric coupling of axion-like particles, values below $10^{-12}$ are reached for particles with masses in the range of a few-hundred eV/$c^2$., Comment: 14 pages, 10 figures, 1 page correction included with 3 figures

Published
2019
Full Text
View/download PDF

16. 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
Full Text
View/download PDF

17. 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
Full Text
View/download PDF

18. 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
Full Text
View/download PDF

19. 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
Full Text
View/download PDF

20. 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
Full Text
View/download PDF

21. 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
Full Text
View/download PDF

22. Background Studies for the MINER Coherent Neutrino Scattering Reactor Experiment

Author

MINER Collaboration, Agnolet, G., Baker, W., Barker, D., Beck, R., Carroll, T. J., Cesar, J., Cushman, P., Dent, J. B., De Rijck, S., Dutta, B., Flanagan, W., Fritts, M., Gao, Y., Harris, H. R., Hays, C. C., Iyer, V., Jastram, A., Kadribasic, F., Kennedy, A., Kubik, A., Ogawa, I., Lang, K., Mahapatra, R., Mandic, V., Martin, R. D., Mast, N., McDeavitt, S., Mirabolfathi, N., Mohanty, B., Nakajima, K., Newhouse, J., Newstead, J. L., Phan, D., Proga, M., Roberts, A., Rogachev, G., Salazar, R., Sander, J., Senapati, K., Shimada, M., Strigari, L., Tamagawa, Y., Teizer, W., Vermaak, J. I. C., Villano, A. N., Walker, J., Webb, B., Wetzel, Z., and Yadavalli, S. A.

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

The proposed Mitchell Institute Neutrino Experiment at Reactor (MINER) experiment at the Nuclear Science Center at Texas A&M University will search for coherent elastic neutrino-nucleus scattering within close proximity (about 2 meters) of a 1 MW TRIGA nuclear reactor core using low threshold, cryogenic germanium and silicon detectors. Given the Standard Model cross section of the scattering process and the proposed experimental proximity to the reactor, as many as 5 to 20 events/kg/day are expected. We discuss the status of preliminary measurements to characterize the main backgrounds for the proposed experiment. Both in situ measurements at the experimental site and simulations using the MCNP and GEANT4 codes are described. A strategy for monitoring backgrounds during data taking is briefly discussed., Comment: 12 pages, 14 figures

Published
2016

23. 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
Full Text
View/download PDF

24. 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

25. 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
Full Text
View/download PDF

26. 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

27. Combined Limits on WIMPs from the CDMS and EDELWEISS Experiments

Author

CDMS, Collaborations, EDELWEISS, Ahmed, Z., Akerib, D. S., Armengaud, E., Arrenberg, S., Augier, C., Bailey, C. N., Balakishiyeva, D., Baudis, L., Bauer, D. A., Benoît, A., Bergé, L., Blümer, J., Brink, P. L., Broniatowski, A., Bruch, T., Brudanin, V., Bunker, R., Cabrera, B., Caldwell, D. O., Censier, B., Chapellier, M., Chardin, G., Charlieux, F., Cooley, J., Coulter, P., Cox, G. A., Cushman, P., Daal, M., Defay, X., De Jesus, M., DeJongh, F., Di Stefano, P. C. F., Dolgorouki, Y., Domange, J., Dumoulin, L., Dragowsky, M. R., Eitel, K., Fallows, S., Figueroa-Feliciano, E., Filippini, J., Filosofov, D., Fourches, N., Fox, J., Fritts, M., Gascon, J., Gerbier, G., Gironnet, J., Golwala, S. R., Gros, M., Hall, J., Hennings-Yeomans, R., Henry, S., Hertel, S. A., Hervé, S., Holmgren, D., Hsu, L., Huber, M. E., Juillard, A., Kamaev, O., Kiveni, M., Kluck, H., Kos, M., Kozlov, V., Kraus, H., Kudryavtsev, V. A., Leman, S. W., Liu, S., Loaiza, P., Mahapatra, R., Mandic, V., Marnieros, S., Martinez, C., McCarthy, K. A., Mirabolfathi, N., Moore, D., Nadeau, P., Navick, X-F., Nelson, H., Nones, C., Ogburn, R. W., Olivieri, E., Pari, P., Pattavina, L., Paul, B., Phipps, A., Pyle, M., Qiu, X., Rau, W., Reisetter, A., Ricci, Y., Robinson, M., Rozov, S., Saab, T., Sadoulet, B., Sander, J., Sanglard, V., Schmidt, B., Schnee, R. W., Scorza, S., Seitz, D. N., Semikh, S., Serfass, B., Sundqvist, K. M., Tarka, M., Torrento-Coello, A. S., Vagneron, L., Verdier, M. -A., Walker, R. J., Wikus, P., Yakushev, E., Yellin, S., Yoo, J., Young, B. A., and Zhang, J.

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

The CDMS and EDELWEISS collaborations have combined the results of their direct searches for dark matter using cryogenic germanium detectors. The total data set represents 614 kg.d equivalent exposure. A straightforward method of combination was chosen for its simplicity before data were exchanged between experiments. The results are interpreted in terms of limits on spin-independent WIMP-nucleon cross-section. For a WIMP mass of 90 GeV/c^2, where this analysis is most sensitive, a cross-section of 3.3 x 10^{-44} cm^2 is excluded at 90% CL. At higher WIMP masses, the combination improves the individual limits, by a factor 1.6 above 700 GeV/c^2. Alternative methods of combining the data provide stronger constraints for some ranges of WIMP masses and weaker constraints for others., Comment: Events, efficiencies, and main limit are available in text format (see README.txt)

Published
2011
Full Text
View/download PDF

28. Search for inelastic dark matter with the CDMS II experiment

Author

CDMS Collaboration, Ahmed, Z., Akerib, D. S., 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., Silva, E. do Couto e, Cushman, P., Daal, M., DeJongh, F., Di Stefano, P., Dragowsky, M. R., Duong, L., Fallows, S., Figueroa-Feliciano, E., Filippini, J., Fox, J., Fritts, M., Golwala, S. R., Hall, J., Hennings-Yeomans, R., Hertel, S. A., 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., Nelson, H., Ogburn, R. W., Phipps, A., Pyle, M., Qiu, X., Ramberg, E., Rau, W., Razeti, M., Reisetter, A., Resch, R., Saab, T., Sadoulet, B., Sander, J., Schnee, R. W., Seitz, D. N., Serfass, B., Sundqvist, K. M., Tarka, M., Wikus, P., Yellin, S., Yoo, J., Young, B. A., and Zhang, J.

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

Results are presented from a reanalysis of the entire five-tower data set acquired with the Cryogenic Dark Matter Search (CDMS II) experiment at the Soudan Underground Laboratory, with an exposure of 969 kg-days. The analysis window was extended to a recoil energy of 150 keV, and an improved surface-event background-rejection cut was defined to increase the sensitivity of the experiment to the inelastic dark matter (iDM) model. Three dark matter candidates were found between 25 keV and 150 keV. The probability to observe three or more background events in this energy range is 11%. Because of the occurrence of these events the constraints on the iDM parameter space are slightly less stringent than those from our previous analysis, which used an energy window of 10-100 keV., Comment: 10 pages, 10 figures, minor changes to match published version, conclusion unchanged

Published
2010
Full Text
View/download PDF

29. Results from a Low-Energy Analysis of the CDMS II Germanium Data

Author

CDMS Collaboration, Ahmed, Z., Akerib, D. S., 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., Silva, E. do Couto e, Cushman, P., Daal, M., DeJongh, F., Di Stefano, P., Dragowsky, M. R., Duong, L., Fallows, S., Figueroa-Feliciano, E., Filippini, J., Fox, J., Fritts, M., Golwala, S. R., Hall, J., Hennings-Yeomans, R., Hertel, S. A., 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., Nelson, H., Ogburn, R. W., Phipps, A., Pyle, M., Qiu, X., Ramberg, E., Rau, W., Reisetter, A., Resch, R., Saab, T., Sadoulet, B., Sander, J., Schnee, R. W., Seitz, D. N., Serfass, B., Sundqvist, K. M., Tarka, M., Wikus, P., Yellin, S., Yoo, J., Young, B. A., and Zhang, J.

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

We report results from a reanalysis of data from the Cryogenic Dark Matter Search (CDMS II) experiment at the Soudan Underground Laboratory. Data taken between October 2006 and September 2008 using eight germanium detectors are reanalyzed with a lowered, 2 keV recoil-energy threshold, to give increased sensitivity to interactions from Weakly Interacting Massive Particles (WIMPs) with masses below ~10 GeV/c^2. This analysis provides stronger constraints than previous CDMS II results for WIMP masses below 9 GeV/c^2 and excludes parameter space associated with possible low-mass WIMP signals from the DAMA/LIBRA and CoGeNT experiments., Comment: 9 pages, 8 figures. Supplemental material included as ancillary files. v3) Added appendix with additional details regarding energy scale and backgrounds

Published
2010
Full Text
View/download PDF

30. Background Studies for the MINER Coherent Neutrino Scattering Reactor Experiment

Author

Miner, Collaboration, Agnolet, G., Baker, W., Barker, D., Beck, R., Carroll, T. J., Cesar, J., Cushman, P., Dent, J. B., Rijck, S., Dutta, B., Flanagan, W., Fritts, M., Gao, Y., Harris, H. R., Hays, C. C., Iyer, V., Jastram, A., Kadribasic, F., Kennedy, A., Kubik, A., Ogawa, I., Lang, K., Mahapatra, R., Mandic, V., Martin, R. D., Mast, N., Mcdeavitt, S., Mirabolfathi, N., Mohanty, B., Nakajima, K., Newhouse, J., Newstead, J. L., Phan, D., Proga, M., Roberts, A., Rogachev, G., Salazar, R., Sander, J., Senapati, K., Shimada, M., Louis Strigari, Tamagawa, Y., Teizer, W., Vermaak, J. I. C., Villano, A. N., Walker, J., Webb, B., Wetzel, Z., and Yadavalli, S. A.

Subjects
High Energy Physics - Experiment (hep-ex), Physics - Instrumentation and Detectors, FOS: Physical sciences, Instrumentation and Detectors (physics.ins-det), High Energy Physics - Experiment
Abstract

The proposed Mitchell Institute Neutrino Experiment at Reactor (MINER) experiment at the Nuclear Science Center at Texas A&M University will search for coherent elastic neutrino-nucleus scattering within close proximity (about 2 meters) of a 1 MW TRIGA nuclear reactor core using low threshold, cryogenic germanium and silicon detectors. Given the Standard Model cross section of the scattering process and the proposed experimental proximity to the reactor, as many as 5 to 20 events/kg/day are expected. We discuss the status of preliminary measurements to characterize the main backgrounds for the proposed experiment. Both in situ measurements at the experimental site and simulations using the MCNP and GEANT4 codes are described. A strategy for monitoring backgrounds during data taking is briefly discussed., 12 pages, 14 figures

Published
2016

31. Combined limits on WIMPs from the CDMS and EDELWEISS experiments

Author

Jeffrey P. Filippini, S. Henry, K. Eitel, Tarek Saab, P. Pari, M. R. Dragowsky, S. Hervé, E. Olivieri, N. Mirabolfathi, Steven W. Leman, P. Cushman, S. V. Rozov, M. A. Verdier, L. Bergé, R. W. Schnee, Martin E. Huber, Kevin A. McCarthy, D. O. Caldwell, F. DeJongh, A. S. Torrento-Coello, J. Hall, Enectali Figueroa-Feliciano, S. Arrenberg, Laura Baudis, D. Balakishiyeva, S. Fallows, Alain Benoit, P. Coulter, Y. Ricci, P. Wikus, G. Chardin, X. Defay, S. J. Yellin, R. Bunker, J. Domange, Miguel Daal, O. Kamaev, D. A. Bauer, B. Paul, A. Broniatowski, H. N. Nelson, A. Reisetter, Blas Cabrera, Cristián Martínez, S. Liu, P. L. Brink, H. Kluck, B. Censier, Z. Ahmed, W. Rau, M. Kos, V. A. Kudryavtsev, S. Scorza, J. Gascon, S. A. Hertel, G. A. Cox, Bernard Sadoulet, D. Filosofov, Y. Dolgorouki, P. Di Stefano, T. Bruch, Bruno Serfass, J. Gironnet, D. N. Seitz, P. Nadeau, E. Armengaud, R. J. Walker, L. Pattavina, R. Hennings-Yeomans, H. Kraus, M. Tarka, Max Robinson, C. Augier, M. Kiveni, M. Gros, P. Loaiza, F. Charlieux, X. Qiu, A. Phipps, R. W. Ogburn, Sunil Golwala, X. F. Navick, C. N. Bailey, M. De Jesus, D. S. Akerib, J. Fox, J. Blümer, E. Yakushev, A. Juillard, M. Pyle, L. Hsu, Jie Zhang, V. Kozlov, Jodi Cooley, Matthew Fritts, Vuk Mandic, B. Schmidt, V.B. Brudanin, M. Chapellier, L. Vagneron, N. Fourches, S. Marnieros, J. Yoo, David Moore, R. Mahapatra, Donald J. Holmgren, J. Sander, C. Nones, Betty A. Young, K. M. Sundqvist, G. Gerbier, V. Sanglard, S. Semikh, L. Dumoulin, Ahmed, Z, Akerib, D, Armengaud, E, Arrenberg, S, Augier, C, Bailey, C, Balakishiyeva, D, Baudis, L, Bauer, D, Benoit, A, Berge, L, Bluemer, J, Brink, P, Broniatowski, A, Bruch, T, Brudanin, V, Bunker, R, Cabrera, B, Caldwell, D, Censier, B, Chapellier, M, Chardin, G, Charlieux, F, Cooley, J, Coulter, P, Cox, G, Cushman, P, Daal, M, Defay, X, De Jesus, M, Dejongh, F, Di Stefano, P, Dolgorouki, Y, Domange, J, Dumoulin, L, Dragowsky, M, Eitel, K, Fallows, S, Figueroa Feliciano, E, Filippini, J, Filosofov, D, Fourches, N, Fox, J, Fritts, M, Gascon, J, Gerbier, G, Gironnet, J, Golwala, S, Gros, M, Hall, J, Hennings Yeomans, R, Henry, S, Hertel, S, Herve, S, Holmgren, D, Hsu, L, Huber, M, Juillard, A, Kamaev, O, Kiveni, M, Kluck, H, Kos, M, Kozlov, V, Kraus, H, Kudryavtsev, V, Leman, S, Liu, S, Loaiza, P, Mahapatra, R, Mandic, V, Marnieros, S, Martinez, C, Mccarthy, K, Mirabolfathi, N, Moore, D, Nadeau, P, Navick, X, Nelson, H, Nones, C, Ogburn, R, Olivieri, E, Pari, P, Pattavina, L, Paul, B, Phipps, A, Pyle, M, Qiu, X, Rau, W, Reisetter, A, Ricci, Y, Robinson, M, Rozov, S, Saab, T, Sadoulet, B, Sander, J, Sanglard, V, Schmidt, B, Schnee, R, Scorza, S, Seitz, D, Semikh, S, Serfass, B, Sundqvist, K, Tarka, M, Torrento Coello, A, Vagneron, L, Verdier, M, Walker, R, Wikus, P, Yakushev, E, Yellin, S, Yoo, J, Young, B, Zhang, J, Institut de Physique Nucléaire de Lyon (IPNL), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Laboratoire Souterrain de Modane (LSM - UMR 6417), Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Institut Rayonnement Matière de Saclay (IRAMIS), EDELWEISS, Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), and Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])

Subjects
Nuclear and High Energy Physics, Particle physics, Cosmology and Nongalactic Astrophysics (astro-ph.CO), Dark Matter, bolometers, germanium detectors, Dark matter, Massive particle, FOS: Physical sciences, Elementary particle, Astrophysics::Cosmology and Extragalactic Astrophysics, EDELWEISS, 7. Clean energy, 01 natural sciences, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), WIMP, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], 010306 general physics, Physics, 010308 nuclear & particles physics, Astrophysics::Instrumentation and Methods for Astrophysics, Fermion, Baryon, Weakly interacting massive particles, High Energy Physics::Experiment, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract

The CDMS and EDELWEISS collaborations have combined the results of their direct searches for dark matter using cryogenic germanium detectors. The total data set represents 614 kg.d equivalent exposure. A straightforward method of combination was chosen for its simplicity before data were exchanged between experiments. The results are interpreted in terms of limits on spin-independent WIMP-nucleon cross-section. For a WIMP mass of 90 GeV/c^2, where this analysis is most sensitive, a cross-section of 3.3 x 10^{-44} cm^2 is excluded at 90% CL. At higher WIMP masses, the combination improves the individual limits, by a factor 1.6 above 700 GeV/c^2. Alternative methods of combining the data provide stronger constraints for some ranges of WIMP masses and weaker constraints for others., Events, efficiencies, and main limit are available in text format (see README.txt)

Published
2011

Catalog

Books, media, physical & digital resources
See catalog results