Search for Event Rate Modulation in XENON100 Electronic Recoil Data

XENON Collaboration

Research output: Contribution to journalArticle

Abstract

We have searched for periodic variations of the electronic recoil event rate in the (2-6) keV energy range recorded between February 2011 and March 2012 with the XENON100 detector, adding up to 224.6 live days in total. Following a detailed study to establish the stability of the detector and its background contributions during this run, we performed an unbinned profile likelihood analysis to identify any periodicity up to 500 days. We find a global significance of less than 1σ for all periods, suggesting no statistically significant modulation in the data. While the local significance for an annual modulation is 2.8σ, the analysis of a multiple-scatter control sample and the phase of the modulation disfavor a dark matter interpretation. The DAMA/LIBRA annual modulation interpreted as a dark matter signature with axial-vector coupling of weakly interacting massive particles to electrons is excluded at 4.8σ.

Original languageEnglish (US)
Article number091302
JournalPhysical Review Letters
Volume115
Issue number9
DOIs
StatePublished - Aug 28 2015

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modulation
electronics
periodic variations
dark matter
demand assignment multiple access
weakly interacting massive particles
detectors
signatures
profiles
electrons
energy

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Search for Event Rate Modulation in XENON100 Electronic Recoil Data. / XENON Collaboration.

In: Physical Review Letters, Vol. 115, No. 9, 091302, 28.08.2015.

Research output: Contribution to journalArticle

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title = "Search for Event Rate Modulation in XENON100 Electronic Recoil Data",
abstract = "We have searched for periodic variations of the electronic recoil event rate in the (2-6) keV energy range recorded between February 2011 and March 2012 with the XENON100 detector, adding up to 224.6 live days in total. Following a detailed study to establish the stability of the detector and its background contributions during this run, we performed an unbinned profile likelihood analysis to identify any periodicity up to 500 days. We find a global significance of less than 1σ for all periods, suggesting no statistically significant modulation in the data. While the local significance for an annual modulation is 2.8σ, the analysis of a multiple-scatter control sample and the phase of the modulation disfavor a dark matter interpretation. The DAMA/LIBRA annual modulation interpreted as a dark matter signature with axial-vector coupling of weakly interacting massive particles to electrons is excluded at 4.8σ.",
author = "{XENON Collaboration} and E. Aprile and J. Aalbers and F. Agostini and M. Alfonsi and M. Anthony and L. Arazi and K. Arisaka and Francesco Arneodo and C. Balan and P. Barrow and L. Baudis and B. Bauermeister and Breur, {P. A.} and A. Brown and E. Brown and S. Bruenner and G. Bruno and R. Budnik and L. B{\"u}tikofer and Cardoso, {J. M.R.} and M. Cervantes and D. Coderre and Colijn, {A. P.} and H. Contreras and Cussonneau, {J. P.} and Decowski, {M. P.} and {De Perio}, P. and {Di Giovanni}, A. and E. Duchovni and S. Fattori and Ferella, {A. D.} and A. Fieguth and W. Fulgione and F. Gao and M. Garbini and C. Geis and Goetzke, {L. W.} and C. Grignon and E. Gross and W. Hampel and C. Hasterok and R. Itay and F. Kaether and B. Kaminsky and G. Kessler and A. Kish and H. Landsman and Lang, {R. F.} and {Le Calloch}, M. and D. Lellouch",
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T1 - Search for Event Rate Modulation in XENON100 Electronic Recoil Data

AU - XENON Collaboration

AU - Aprile, E.

AU - Aalbers, J.

AU - Agostini, F.

AU - Alfonsi, M.

AU - Anthony, M.

AU - Arazi, L.

AU - Arisaka, K.

AU - Arneodo, Francesco

AU - Balan, C.

AU - Barrow, P.

AU - Baudis, L.

AU - Bauermeister, B.

AU - Breur, P. A.

AU - Brown, A.

AU - Brown, E.

AU - Bruenner, S.

AU - Bruno, G.

AU - Budnik, R.

AU - Bütikofer, L.

AU - Cardoso, J. M.R.

AU - Cervantes, M.

AU - Coderre, D.

AU - Colijn, A. P.

AU - Contreras, H.

AU - Cussonneau, J. P.

AU - Decowski, M. P.

AU - De Perio, P.

AU - Di Giovanni, A.

AU - Duchovni, E.

AU - Fattori, S.

AU - Ferella, A. D.

AU - Fieguth, A.

AU - Fulgione, W.

AU - Gao, F.

AU - Garbini, M.

AU - Geis, C.

AU - Goetzke, L. W.

AU - Grignon, C.

AU - Gross, E.

AU - Hampel, W.

AU - Hasterok, C.

AU - Itay, R.

AU - Kaether, F.

AU - Kaminsky, B.

AU - Kessler, G.

AU - Kish, A.

AU - Landsman, H.

AU - Lang, R. F.

AU - Le Calloch, M.

AU - Lellouch, D.

PY - 2015/8/28

Y1 - 2015/8/28

N2 - We have searched for periodic variations of the electronic recoil event rate in the (2-6) keV energy range recorded between February 2011 and March 2012 with the XENON100 detector, adding up to 224.6 live days in total. Following a detailed study to establish the stability of the detector and its background contributions during this run, we performed an unbinned profile likelihood analysis to identify any periodicity up to 500 days. We find a global significance of less than 1σ for all periods, suggesting no statistically significant modulation in the data. While the local significance for an annual modulation is 2.8σ, the analysis of a multiple-scatter control sample and the phase of the modulation disfavor a dark matter interpretation. The DAMA/LIBRA annual modulation interpreted as a dark matter signature with axial-vector coupling of weakly interacting massive particles to electrons is excluded at 4.8σ.

AB - We have searched for periodic variations of the electronic recoil event rate in the (2-6) keV energy range recorded between February 2011 and March 2012 with the XENON100 detector, adding up to 224.6 live days in total. Following a detailed study to establish the stability of the detector and its background contributions during this run, we performed an unbinned profile likelihood analysis to identify any periodicity up to 500 days. We find a global significance of less than 1σ for all periods, suggesting no statistically significant modulation in the data. While the local significance for an annual modulation is 2.8σ, the analysis of a multiple-scatter control sample and the phase of the modulation disfavor a dark matter interpretation. The DAMA/LIBRA annual modulation interpreted as a dark matter signature with axial-vector coupling of weakly interacting massive particles to electrons is excluded at 4.8σ.

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JF - Physical Review Letters

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