LUX-ZEPLIN

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Direct detection of dark matter—APPEC committee report* *This report has received approval from APPEC (1 April 2021; https://appec.org/documents).

Reports on Progress in Physics IOP Publishing 85:5 (2022) 056201

Authors:

Julien Billard, Mark Boulay, Susana Cebrián, Laura Covi, Giuliana Fiorillo, Anne Green, Joachim Kopp, Béla Majorovits, Kimberly Palladino, Federica Petricca, Leszek Roszkowski, Marc Schumann
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Design and production of the high voltage electrode grids and electron extraction region for the LZ dual-phase xenon time projection chamber

Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment Elsevier 1031 (2022) 165955

Authors:

R Linehan, RL Mannino, A Fan, CM Ignarra, S Luitz, K Skarpaas, TA Shutt, DS Akerib, SK Alsum, TJ Anderson, HM Araújo, M Arthurs, H Auyeung, AJ Bailey, TP Biesiadzinski, M Breidenbach, JJ Cherwinka, RA Conley, J Genovesi, MGD Gilchriese, A Glaenzer, TG Gonda, K Hanzel, MD Hoff, W Ji, AC Kaboth, S Kravitz, NR Kurita, AR Lambert, KT Lesko, W Lorenzon, PA Majewski, EH Miller, ME Monzani, KJ Palladino, BN Ratcliff, JS Saba, D Santone, GW Shutt, K Stifter, M Szydagis, A Tomás, J Va’vra, WL Waldron, RC Webb, RG White, TJ Whitis, K Wilson, WJ Wisniewski
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Cosmogenic production of Ar37 in the context of the LUX-ZEPLIN experiment

Physical Review D American Physical Society (APS) 105:8 (2022) 082004

Authors:

J Aalbers, DS Akerib, AK Al Musalhi, F Alder, SK Alsum, CS Amarasinghe, A Ames, TJ Anderson, N Angelides, HM Araújo, JE Armstrong, M Arthurs, X Bai, A Baker, J Balajthy, S Balashov, J Bang, JW Bargemann, D Bauer, A Baxter, K Beattie, EP Bernard, A Bhatti, A Biekert, TP Biesiadzinski, HJ Birch, GM Blockinger, E Bodnia, B Boxer, CAJ Brew, P Brás, S Burdin, JK Busenitz, M Buuck, R Cabrita, MC Carmona-Benitez, M Cascella, C Chan, A Chawla, H Chen, NI Chott, A Cole, MV Converse, A Cottle, G Cox, O Creaner, JE Cutter, CE Dahl, A David, L de Viveiros, JEY Dobson, E Druszkiewicz, SR Eriksen, A Fan, S Fayer, NM Fearon, S Fiorucci, H Flaecher, ED Fraser, T Fruth, RJ Gaitskell, J Genovesi, C Ghag, E Gibson, MGD Gilchriese, S Gokhale, MGD van der Grinten, CB Gwilliam, CR Hall, SJ Haselschwardt, SA Hertel, M Horn, DQ Huang, D Hunt, CM Ignarra, O Jahangir, RS James, W Ji, J Johnson, AC Kaboth, AC Kamaha, K Kamdin, D Khaitan, A Khazov, I Khurana, D Kodroff, L Korley, EV Korolkova, H Kraus, S Kravitz, L Kreczko, VA Kudryavtsev, EA Leason, DS Leonard, KT Lesko, C Levy, J Lee, J Lin, A Lindote, R Linehan, WH Lippincott, X Liu, MI Lopes, E Lopez Asamar, B Lopez-Paredes, W Lorenzon, S Luitz, PA Majewski, A Manalaysay, L Manenti, RL Mannino, N Marangou, ME McCarthy, DN McKinsey, J McLaughlin, EH Miller, E Mizrachi, A Monte, ME Monzani, JA Morad, JD Morales Mendoza, E Morrison, BJ Mount, A St. J. Murphy, D Naim, A Naylor, C Nedlik, HN Nelson, F Neves, JA Nikoleyczik, A Nilima, I Olcina, K Oliver-Mallory, S Pal, KJ Palladino, J Palmer, N Parveen, SJ Patton, EK Pease, B Penning, G Pereira, E Perry, J Pershing, A Piepke, D Porzio, Y Qie, J Reichenbacher, CA Rhyne, A Richards, Q Riffard, GRC Rischbieter, R Rosero, P Rossiter, T Rushton, D Santone, ABMR Sazzad, RW Schnee, PR Scovell, S Shaw, TA Shutt, JJ Silk, C Silva, G Sinev, R Smith, M Solmaz, VN Solovov, P Sorensen, J Soria, I Stancu, A Stevens, K Stifter, B Suerfu, TJ Sumner, N Swanson, M Szydagis, WC Taylor, R Taylor, DJ Temples, PA Terman, DR Tiedt, M Timalsina, WH To, Z Tong, DR Tovey, M Trask, M Tripathi, DR Tronstad, W Turner, U Utku, A Vaitkus, B Wang, Y Wang, JJ Wang, W Wang, JR Watson, RC Webb, RG White, TJ Whitis, M Williams, FLH Wolfs, S Woodford, D Woodward, CJ Wright, Q Xia, X Xiang, J Xu, M Yeh
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Cosmogenic production of Ar37 in the context of the LUX-ZEPLIN experiment

Phys.Rev.D 105 (2022) 8, 082004

Authors:

J. Aalbers, D.S. Akerib, A.K. Al Musalhi, F. Alder, S.K. Alsum, C.S. Amarasinghe, A. Ames, T.J. Anderson, N. Angelides, H.M. Araújo, J.E. Armstrong, M. Arthurs, X. Bai, A. Baker, J. Balajthy, S. Balashov, J. Bang, J.W. Bargemann, D. Bauer, A. Baxter, K. Beattie, E.P. Bernard, A. Bhatti, A. Biekert, T.P. Biesiadzinski, H.J. Birch, G.M. Blockinger, E. Bodnia, B. Boxer, C.A.J. Brew, P. Brás, S. Burdin, J.K. Busenitz, M. Buuck, R. Cabrita, M.C. Carmona-Benitez, M. Cascella, C. Chan, A. Chawla, H. Chen, N.I. Chott, A. Cole, M.V. Converse, A. Cottle, G. Cox, O. Creaner, J.E. Cutter, C.E. Dahl, A. David, L. de Viveiros, J.E.Y. Dobson, E. Druszkiewicz, S.R. Eriksen, A. Fan, S. Fayer, N.M. Fearon, S. Fiorucci, H. Flaecher, E.D. Fraser, T. Fruth, R.J. Gaitskell, J. Genovesi, C. Ghag, E. Gibson, M.G.D. Gilchriese, S. Gokhale, M.G.D.van der Grinten, C.B. Gwilliam, C.R. Hall, S.J. Haselschwardt, S.A. Hertel, M. Horn, D.Q. Huang, D. Hunt, C.M. Ignarra, O. Jahangir, R.S. James, W. Ji, J. Johnson, A.C. Kaboth, A.C. Kamaha, K. Kamdin, D. Khaitan, A. Khazov, I. Khurana, D. Kodroff, L. Korley, E.V. Korolkova, H. Kraus, S. Kravitz, L. Kreczko, V.A. Kudryavtsev, E.A. Leason, D.S. Leonard, K.T. Lesko, C. Levy, J. Lee, J. Lin, A. Lindote, R. Linehan , W.H. Lippincott, X. Liu, M.I. Lopes, E. Lopez Asamar, B. Lopez-Paredes, W. Lorenzon, S. Luitz, P.A. Majewski, A. Manalaysay, L. Manenti, R.L. Mannino, N. Marangou, M.E. McCarthy, D.N. McKinsey, J. McLaughlin, E.H. Miller, E. Mizrachi, A. Monte, M.E. Monzani, J.A. Morad, J.D. Morales Mendoza, E. Morrison, B.J. Mount, A.St.J. Murphy, D. Naim, A. Naylor, C. Nedlik, H.N. Nelson, F. Neves, J.A. Nikoleyczik, A. Nilima, I. Olcina, K. Oliver-Mallory, S. Pal, K.J. Palladino, J. Palmer, N. Parveen, S.J. Patton, E.K. Pease, B. Penning, G. Pereira, E. Perry, J. Pershing, A. Piepke, D. Porzio, Y. Qie, J. Reichenbacher, C.A. Rhyne, A. Richards, Q. Riffard, %Q. Riffard, G.R.C. Rischbieter, R. Rosero, P. Rossiter, T. Rushton, D. Santone, A.B.M.R. Sazzad, R.W. Schnee, P.R. Scovell, S. Shaw, T.A. 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, W.C. Taylor, R. Taylor, D.J. Temples, P.A. Terman, D.R. Tiedt, M. Timalsina, W.H. To, Z. Tong, D.R. Tovey, M. Trask, M. Tripathi, D.R. Tronstad, W. Turner, U. Utku, A. Vaitkus, B. Wang, Y. Wang, J.J. Wang, W. Wang, J.R. Watson, R.C. Webb, R.G. White, T.J. Whitis, M. Williams, F.L.H. Wolfs, S. Woodford, D. Woodward, C.J. Wright, Q. Xia, X. Xiang, J. Xu, M. Yeh

Abstract:

We estimate the amount of Ar37 produced in natural xenon via cosmic-ray-induced spallation, an inevitable consequence of the transportation and storage of xenon on the Earth’s surface. We then calculate the resulting Ar37 concentration in a 10-tonne payload (similar to that of the LUX-ZEPLIN experiment) assuming a representative schedule of xenon purification, storage, and delivery to the underground facility. Using the spallation model by Silberberg and Tsao, the sea-level production rate of Ar37 in natural xenon is estimated to be 0.024  atoms/kg/day. Assuming the xenon is successively purified to remove radioactive contaminants in 1-tonne batches at a rate of 1  tonne/month, the average Ar37 activity after 10 tons are purified and transported underground is 0.058−0.090  μBq/kg, depending on the degree of argon removal during above-ground purification. Such cosmogenic Ar37 will appear as a noticeable background in the early science data, while decaying with a 35-day half-life. This newly noticed production mechanism of Ar37 should be considered when planning for future liquid-xenon-based experiments
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Probing spin-dependent dark matter interactions with $$^6$$Li

The European Physical Journal C SpringerOpen 82:3 (2022) 207

Authors:

G Angloher, G Benato, A Bento, E Bertoldo, A Bertolini, R Breier, C Bucci, L Canonica, A D’Addabbo, S Di Lorenzo, L Einfalt, A Erb, FV Feilitzsch, N Ferreiro Iachellini, S Fichtinger, D Fuchs, A Fuss, A Garai, VM Ghete, P Gorla, S Gupta, D Hauff, M Ješkovský, J Jochum, M Kaznacheeva, H Kraus

Abstract:

Using CaWO$_4$ crystals as cryogenic calorimeters, the CRESST experiment searches for nuclear recoils caused by the scattering of potential Dark Matter particles. A reliable identification of a potential signal crucially depends on an accurate background model. In this work we introduce an improved normalisation method for CRESST's model of the electromagnetic backgrounds. Spectral templates, based on Geant4 simulations, are normalised via a Bayesian likelihood fit to experimental background data. Contrary to our previous work, no assumption of partial secular equilibrium is required, which results in a more robust and versatile applicability. Furthermore, considering the correlation between all background components allows us to explain 82.7% of the experimental background within [1 keV, 40 keV], an improvement of 18.6% compared to our previous method.Comment: 24 pages, 14 figures, submitted to EPJ
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