Results from a search for light-mass dark matter with a p-type point contact Germanium detector

C. E. Aalseth; P. S. Barbeau; N. S. Bowden; B. Cabrera-Palmer; J. Colaresi; J. I. Collar; S. Dazeley; P. De Lurgio; J. E. Fast; N. Fields; C. H. Greenberg; T. W. Hossbach; M. E. Keillor; J. D. Kephart; M. G. Marino; H. S. Miley; M. L. Miller; J. L. Orrell; D. C. Radford; D. Reyna; O. Tench; T. D. Van Wechel; J. F. Wilkerson; K. M. Yocum

doi:10.1103/PhysRevLett.106.131301

Results from a search for light-mass dark matter with a p-type point contact Germanium detector

C. E. Aalseth, P. S. Barbeau, N. S. Bowden, B. Cabrera-Palmer, J. Colaresi, J. I. Collar, S. Dazeley, P. De Lurgio, J. E. Fast, N. Fields, C. H. Greenberg, T. W. Hossbach, M. E. Keillor, J. D. Kephart, M. G. Marino, H. S. Miley, M. L. Miller, J. L. Orrell, D. C. Radford, D. ReynaO. Tench, T. D. Van Wechel, J. F. Wilkerson, K. M. Yocum

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Abstract

We report on several features in the energy spectrum from an ultralow-noise germanium detector operated deep underground. By implementing a new technique able to reject surface events, a number of cosmogenic peaks can be observed for the first time. We discuss an irreducible excess of bulklike events below 3akeV in ionization energy. These could be caused by unknown backgrounds, but also dark matter interactions consistent with DAMA/LIBRA. It is not yet possible to determine their origin. Improved constraints are placed on a cosmological origin for the DAMA/LIBRA effect.

Original language	English
Article number	131301
Journal	Physical Review Letters
Volume	106
Issue number	13
DOIs	https://doi.org/10.1103/PhysRevLett.106.131301
State	Published - Mar 29 2011

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10.1103/PhysRevLett.106.131301

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Aalseth, C. E., Barbeau, P. S., Bowden, N. S., Cabrera-Palmer, B., Colaresi, J., Collar, J. I., Dazeley, S., De Lurgio, P., Fast, J. E., Fields, N., Greenberg, C. H., Hossbach, T. W., Keillor, M. E., Kephart, J. D., Marino, M. G., Miley, H. S., Miller, M. L., Orrell, J. L., Radford, D. C., ... Yocum, K. M. (2011). Results from a search for light-mass dark matter with a p-type point contact Germanium detector. Physical Review Letters, 106(13), Article 131301. https://doi.org/10.1103/PhysRevLett.106.131301

@article{d4146d1a13364df59622665eb032b800,

title = "Results from a search for light-mass dark matter with a p-type point contact Germanium detector",

abstract = "We report on several features in the energy spectrum from an ultralow-noise germanium detector operated deep underground. By implementing a new technique able to reject surface events, a number of cosmogenic peaks can be observed for the first time. We discuss an irreducible excess of bulklike events below 3akeV in ionization energy. These could be caused by unknown backgrounds, but also dark matter interactions consistent with DAMA/LIBRA. It is not yet possible to determine their origin. Improved constraints are placed on a cosmological origin for the DAMA/LIBRA effect.",

author = "Aalseth, {C. E.} and Barbeau, {P. S.} and Bowden, {N. S.} and B. Cabrera-Palmer and J. Colaresi and Collar, {J. I.} and S. Dazeley and {De Lurgio}, P. and Fast, {J. E.} and N. Fields and Greenberg, {C. H.} and Hossbach, {T. W.} and Keillor, {M. E.} and Kephart, {J. D.} and Marino, {M. G.} and Miley, {H. S.} and Miller, {M. L.} and Orrell, {J. L.} and Radford, {D. C.} and D. Reyna and O. Tench and {Van Wechel}, {T. D.} and Wilkerson, {J. F.} and Yocum, {K. M.}",

year = "2011",

month = mar,

day = "29",

doi = "10.1103/PhysRevLett.106.131301",

language = "English",

volume = "106",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society",

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Aalseth, CE, Barbeau, PS, Bowden, NS, Cabrera-Palmer, B, Colaresi, J, Collar, JI, Dazeley, S, De Lurgio, P, Fast, JE, Fields, N, Greenberg, CH, Hossbach, TW, Keillor, ME, Kephart, JD, Marino, MG, Miley, HS, Miller, ML, Orrell, JL, Radford, DC, Reyna, D, Tench, O, Van Wechel, TD, Wilkerson, JF & Yocum, KM 2011, 'Results from a search for light-mass dark matter with a p-type point contact Germanium detector', Physical Review Letters, vol. 106, no. 13, 131301. https://doi.org/10.1103/PhysRevLett.106.131301

TY - JOUR

T1 - Results from a search for light-mass dark matter with a p-type point contact Germanium detector

AU - Aalseth, C. E.

AU - Barbeau, P. S.

AU - Bowden, N. S.

AU - Cabrera-Palmer, B.

AU - Colaresi, J.

AU - Collar, J. I.

AU - Dazeley, S.

AU - De Lurgio, P.

AU - Fast, J. E.

AU - Fields, N.

AU - Greenberg, C. H.

AU - Hossbach, T. W.

AU - Keillor, M. E.

AU - Kephart, J. D.

AU - Marino, M. G.

AU - Miley, H. S.

AU - Miller, M. L.

AU - Orrell, J. L.

AU - Radford, D. C.

AU - Reyna, D.

AU - Tench, O.

AU - Van Wechel, T. D.

AU - Wilkerson, J. F.

AU - Yocum, K. M.

PY - 2011/3/29

Y1 - 2011/3/29

N2 - We report on several features in the energy spectrum from an ultralow-noise germanium detector operated deep underground. By implementing a new technique able to reject surface events, a number of cosmogenic peaks can be observed for the first time. We discuss an irreducible excess of bulklike events below 3akeV in ionization energy. These could be caused by unknown backgrounds, but also dark matter interactions consistent with DAMA/LIBRA. It is not yet possible to determine their origin. Improved constraints are placed on a cosmological origin for the DAMA/LIBRA effect.

AB - We report on several features in the energy spectrum from an ultralow-noise germanium detector operated deep underground. By implementing a new technique able to reject surface events, a number of cosmogenic peaks can be observed for the first time. We discuss an irreducible excess of bulklike events below 3akeV in ionization energy. These could be caused by unknown backgrounds, but also dark matter interactions consistent with DAMA/LIBRA. It is not yet possible to determine their origin. Improved constraints are placed on a cosmological origin for the DAMA/LIBRA effect.

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DO - 10.1103/PhysRevLett.106.131301

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VL - 106

JO - Physical Review Letters

JF - Physical Review Letters

IS - 13

M1 - 131301

ER -

Results from a search for light-mass dark matter with a p-type point contact Germanium detector

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