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Background Determination for the LUX-ZEPLIN (LZ) Dark Matter Experiment

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arxiv 2211.17120 v2 pith:5VWVHHGR submitted 2022-11-30 hep-ex physics.ins-det

J. Aalbers , D.S. Akerib , A.K. Al Musalhi , F. Alder , S.K. Alsum , C.S. Amarasinghe , A. Ames , T.J. Anderson
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N. Angelides H.M. Araújo J.E. Armstrong M. Arthurs A. Baker J. Bang J.W. Bargemann A. Baxter K. Beattie P. Beltrame E.P. Bernard A. Bhatti A. Biekert T.P. Biesiadzinski H.J. Birch G.M. Blockinger B. Boxer C.A.J. Brew P. Brás S. Burdin M. Buuck R. Cabrita M.C. Carmona-Benitez C. Chan A. Chawla H. Chen A.P.S. Chiang N.I. Chott M.V. Converse A. Cottle G. Cox O. Creaner C.E. Dahl A. David S. Dey L. de Viveiros C. Ding J.E.Y. Dobson E. Druszkiewicz S.R. Eriksen A. Fan N.M. Fearon S. Fiorucci H. Flaecher E.D. Fraser T. Fruth R.J. Gaitskell J. Genovesi C. Ghag R. Gibbons M.G.D. Gilchriese S. Gokhale J. Green M.G.D.van der Grinten C.B. Gwilliam C.R. Hall S. Han E. Hartigan-O'Connor S.J. Haselschwardt S.A. Hertel G. Heuermann M. Horn D.Q. Huang D. Hunt C.M. Ignarra R.G. Jacobsen O. Jahangir R.S. James J. Johnson A.C. Kaboth A.C. Kamaha D. Khaitan I. Khurana R. Kirk D. Kodroff L. Korley E.V. Korolkova H. Kraus S. Kravitz L. Kreczko B. Krikler V.A. Kudryavtsev E.A. Leason J. Lee D.S. Leonard K.T. Lesko C. Levy J. Lin A. Lindote R. Linehan W.H. Lippincott X. Liu M.I. Lopes E. Lopez Asamar B. López Paredes W. Lorenzon C. Lu S. Luitz P.A. Majewski A. Manalaysay R.L. Mannino N. Marangou M.E. McCarthy D.N. McKinsey J. McLaughlin E.H. Miller E. Mizrachi A. Monte M.E. Monzani J.D. Morales Mendoza E. Morrison B.J. Mount M. Murdy A.St.J. Murphy D. Naim A. Naylor C. Nedlik H.N. Nelson F. Neves A. Nguyen J.A. Nikoleyczik I. Olcina K.C. Oliver-Mallory J. Orpwood K.J. Palladino J. Palmer N. Parveen S.J. Patton B. Penning G. Pereira E. Perry T. Pershing A. Piepke D. Porzio S. Poudel Y. Qie J. Reichenbacher C.A. Rhyne Q. Riffard G.R.C. Rischbieter H.S. Riyat R. Rosero P. Rossiter T. Rushton D. Santone A.B.M.R. Sazzad R.W. Schnee S. Shaw T. Shutt J.J. Silk C. Silva G. Sinev R. Smith M. Solmaz V.N. Solovov P. Sorensen J. Soria I. Stancu A. Stevens K. Stifter B. Suerfu T.J. Sumner N. Swanson M. Szydagis R. Taylor W.C. Taylor D.J. Temples P.A. Terman D.R. Tiedt M. Timalsina Z. Tong D.R. Tovey J. Tranter M. Trask M. Tripathi D.R. Tronstad W. Turner U. Utku A.C. Vaitkus A. Wang J.J. Wang W. Wang Y. Wang J.R. Watson R.C. Webb T.J. Whitis M. Williams F.L.H. Wolfs S. Woodford D. Woodward C.J. Wright Q. Xia X. Xiang J. Xu M. Yeh
This is my paper · ORCID
classification hep-exphysics.ins-det
keywords experimentlux-zeplinbackgroundbackgroundsratereportedtimes10wimp
verification ladder T0 review T1 audit T2 compute T3 formal

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abstract

The LUX-ZEPLIN experiment recently reported limits on WIMP-nucleus interactions from its initial science run, down to $9.2\times10^{-48}$ cm$^2$ for the spin-independent interaction of a 36 GeV/c$^2$ WIMP at 90% confidence level. In this paper, we present a comprehensive analysis of the backgrounds important for this result and for other upcoming physics analyses, including neutrinoless double-beta decay searches and effective field theory interpretations of LUX-ZEPLIN data. We confirm that the in-situ determinations of bulk and fixed radioactive backgrounds are consistent with expectations from the ex-situ assays. The observed background rate after WIMP search criteria were applied was $(6.3\pm0.5)\times10^{-5}$ events/keV$_{ee}$/kg/day in the low-energy region, approximately 60 times lower than the equivalent rate reported by the LUX experiment.

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Cited by 3 Pith papers

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