Search for Electronic Recoil Event Rate Modulation with 4 Years of XENON100 Data

XENON Collaboration

Research output: Contribution to journalArticle

Abstract

We report on a search for electronic recoil event rate modulation signatures in the XENON100 data accumulated over a period of 4 yr, from January 2010 to January 2014. A profile likelihood method, which incorporates the stability of the XENON100 detector and the known electronic recoil background model, is used to quantify the significance of periodicity in the time distribution of events. There is a weak modulation signature at a period of 431-14+16 day in the low energy region of (2.0-5.8) keV in the single scatter event sample, with a global significance of 1.9σ; however, no other more significant modulation is observed. The significance of an annual modulation signature drops from 2.8σ, from a previous analysis of a subset of this data, to 1.8σ with all data combined. Single scatter events in the low energy region are thus used to exclude the DAMA/LIBRA annual modulation as being due to dark matter electron interactions via axial vector coupling at 5.7σ.

Original languageEnglish (US)
Article number101101
JournalPhysical Review Letters
Volume118
Issue number10
DOIs
StatePublished - Mar 6 2017

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modulation
electronics
signatures
demand assignment multiple access
set theory
periodic variations
dark matter
electron scattering
energy
detectors
profiles

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Search for Electronic Recoil Event Rate Modulation with 4 Years of XENON100 Data. / XENON Collaboration.

In: Physical Review Letters, Vol. 118, No. 10, 101101, 06.03.2017.

Research output: Contribution to journalArticle

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abstract = "We report on a search for electronic recoil event rate modulation signatures in the XENON100 data accumulated over a period of 4 yr, from January 2010 to January 2014. A profile likelihood method, which incorporates the stability of the XENON100 detector and the known electronic recoil background model, is used to quantify the significance of periodicity in the time distribution of events. There is a weak modulation signature at a period of 431-14+16 day in the low energy region of (2.0-5.8) keV in the single scatter event sample, with a global significance of 1.9σ; however, no other more significant modulation is observed. The significance of an annual modulation signature drops from 2.8σ, from a previous analysis of a subset of this data, to 1.8σ with all data combined. Single scatter events in the low energy region are thus used to exclude the DAMA/LIBRA annual modulation as being due to dark matter electron interactions via axial vector coupling at 5.7σ.",
author = "{XENON Collaboration} and E. Aprile and J. Aalbers and F. Agostini and M. Alfonsi and Amaro, {F. D.} and M. Anthony and Francesco Arneodo and P. Barrow and L. Baudis and B. Bauermeister and {Lotfi Benabderrhmane}, Mohamed and T. Berger 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 J. Calv{\'e}n and Cardoso, {J. M.R.} and M. Cervantes and D. Cichon and D. Coderre and Colijn, {A. P.} and J. Conrad and Cussonneau, {J. P.} and Decowski, {M. P.} and {De Perio}, P. and {Di Gangi}, P. and {Di Giovanni}, A. and S. Diglio and G. Eurin and J. Fei and Ferella, {A. D.} and A. Fieguth and D. Franco and W. Fulgione and {Gallo Rosso}, A. and M. Galloway and F. Gao and M. Garbini and C. Geis and Goetzke, {L. W.} and Z. Greene and C. Grignon and C. Hasterok and E. Hogenbirk and R. Itay and B. Kaminsky",
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AU - XENON Collaboration

AU - Aprile, E.

AU - Aalbers, J.

AU - Agostini, F.

AU - Alfonsi, M.

AU - Amaro, F. D.

AU - Anthony, M.

AU - Arneodo, Francesco

AU - Barrow, P.

AU - Baudis, L.

AU - Bauermeister, B.

AU - Lotfi Benabderrhmane, Mohamed

AU - Berger, T.

AU - Breur, P. A.

AU - Brown, A.

AU - Brown, E.

AU - Bruenner, S.

AU - Bruno, G.

AU - Budnik, R.

AU - Bütikofer, L.

AU - Calvén, J.

AU - Cardoso, J. M.R.

AU - Cervantes, M.

AU - Cichon, D.

AU - Coderre, D.

AU - Colijn, A. P.

AU - Conrad, J.

AU - Cussonneau, J. P.

AU - Decowski, M. P.

AU - De Perio, P.

AU - Di Gangi, P.

AU - Di Giovanni, A.

AU - Diglio, S.

AU - Eurin, G.

AU - Fei, J.

AU - Ferella, A. D.

AU - Fieguth, A.

AU - Franco, D.

AU - Fulgione, W.

AU - Gallo Rosso, A.

AU - Galloway, M.

AU - Gao, F.

AU - Garbini, M.

AU - Geis, C.

AU - Goetzke, L. W.

AU - Greene, Z.

AU - Grignon, C.

AU - Hasterok, C.

AU - Hogenbirk, E.

AU - Itay, R.

AU - Kaminsky, B.

PY - 2017/3/6

Y1 - 2017/3/6

N2 - We report on a search for electronic recoil event rate modulation signatures in the XENON100 data accumulated over a period of 4 yr, from January 2010 to January 2014. A profile likelihood method, which incorporates the stability of the XENON100 detector and the known electronic recoil background model, is used to quantify the significance of periodicity in the time distribution of events. There is a weak modulation signature at a period of 431-14+16 day in the low energy region of (2.0-5.8) keV in the single scatter event sample, with a global significance of 1.9σ; however, no other more significant modulation is observed. The significance of an annual modulation signature drops from 2.8σ, from a previous analysis of a subset of this data, to 1.8σ with all data combined. Single scatter events in the low energy region are thus used to exclude the DAMA/LIBRA annual modulation as being due to dark matter electron interactions via axial vector coupling at 5.7σ.

AB - We report on a search for electronic recoil event rate modulation signatures in the XENON100 data accumulated over a period of 4 yr, from January 2010 to January 2014. A profile likelihood method, which incorporates the stability of the XENON100 detector and the known electronic recoil background model, is used to quantify the significance of periodicity in the time distribution of events. There is a weak modulation signature at a period of 431-14+16 day in the low energy region of (2.0-5.8) keV in the single scatter event sample, with a global significance of 1.9σ; however, no other more significant modulation is observed. The significance of an annual modulation signature drops from 2.8σ, from a previous analysis of a subset of this data, to 1.8σ with all data combined. Single scatter events in the low energy region are thus used to exclude the DAMA/LIBRA annual modulation as being due to dark matter electron interactions via axial vector coupling at 5.7σ.

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