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1. First Dark Matter Search Results from the LUX-ZEPLIN (LZ) Experiment

Author

Aalbers, J, Akerib, DS, Akerlof, CW, Al Musalhi, AK, Alder, F, Alqahtani, A, Alsum, SK, Amarasinghe, CS, Ames, A, Anderson, TJ, Angelides, N, Araújo, HM, Armstrong, JE, Arthurs, M, Azadi, S, Bailey, AJ, Baker, A, Balajthy, J, Balashov, S, Bang, J, Bargemann, JW, Barry, MJ, Barthel, J, Bauer, D, Baxter, A, Beattie, K, Belle, J, Beltrame, P, Bensinger, J, Benson, T, Bernard, EP, Bhatti, A, Biekert, A, Biesiadzinski, TP, Birch, HJ, Birrittella, B, Blockinger, GM, Boast, KE, Boxer, B, Bramante, R, Brew, CAJ, Brás, P, Buckley, JH, Bugaev, VV, Burdin, S, Busenitz, JK, Buuck, M, Cabrita, R, Carels, C, Carlsmith, DL, Carlson, B, Carmona-Benitez, MC, Cascella, M, Chan, C, Chawla, A, Chen, H, Cherwinka, JJ, Chott, NI, Cole, A, Coleman, J, Converse, MV, Cottle, A, Cox, G, Craddock, WW, Creaner, O, Curran, D, Currie, A, Cutter, JE, Dahl, CE, David, A, Davis, J, Davison, TJR, Delgaudio, J, Dey, S, de Viveiros, L, Dobi, A, Dobson, JEY, Druszkiewicz, E, Dushkin, A, Edberg, TK, Edwards, WR, Elnimr, MM, Emmet, WT, Eriksen, SR, Faham, CH, Fan, A, Fayer, S, Fearon, NM, Fiorucci, S, Flaecher, H, Ford, P, Francis, VB, Fraser, ED, Fruth, T, Gaitskell, RJ, Gantos, NJ, Garcia, D, Geffre, A, Gehman, VM, and Genovesi, J

Subjects
Nuclear and Plasma Physics, Particle and High Energy Physics, Physical Sciences, LUX-ZEPLIN Collaboration, Mathematical Sciences, Engineering, General Physics, Mathematical sciences, Physical sciences
Abstract

The LUX-ZEPLIN experiment is a dark matter detector centered on a dual-phase xenon time projection chamber operating at the Sanford Underground Research Facility in Lead, South Dakota, USA. This Letter reports results from LUX-ZEPLIN's first search for weakly interacting massive particles (WIMPs) with an exposure of 60 live days using a fiducial mass of 5.5 t. A profile-likelihood ratio analysis shows the data to be consistent with a background-only hypothesis, setting new limits on spin-independent WIMP-nucleon, spin-dependent WIMP-neutron, and spin-dependent WIMP-proton cross sections for WIMP masses above 9  GeV/c^{2}. The most stringent limit is set for spin-independent scattering at 36  GeV/c^{2}, rejecting cross sections above 9.2×10^{-48}  cm at the 90% confidence level.

Published
2023

2. A next-generation liquid xenon observatory for dark matter and neutrino physics

Author

Aalbers, J, AbdusSalam, SS, Abe, K, Aerne, V, Agostini, F, Maouloud, S Ahmed, Akerib, DS, Akimov, DY, Akshat, J, Al Musalhi, AK, Alder, F, Alsum, SK, Althueser, L, Amarasinghe, CS, Amaro, FD, Ames, A, Anderson, TJ, Andrieu, B, Angelides, N, Angelino, E, Angevaare, J, Antochi, VC, Martin, D Antón, Antunovic, B, Aprile, E, Araújo, HM, Armstrong, JE, Arneodo, F, Arthurs, M, Asadi, P, Baek, S, Bai, X, Bajpai, D, Baker, A, Balajthy, J, Balashov, S, Balzer, M, Bandyopadhyay, A, Bang, J, Barberio, E, Bargemann, JW, Baudis, L, Bauer, D, Baur, D, Baxter, A, Baxter, AL, Bazyk, M, Beattie, K, Behrens, J, Bell, NF, Bellagamba, L, Beltrame, P, Benabderrahmane, M, Bernard, EP, Bertone, GF, Bhattacharjee, P, Bhatti, A, Biekert, A, Biesiadzinski, TP, Binau, AR, Biondi, R, Biondi, Y, Birch, HJ, Bishara, F, Bismark, A, Blanco, C, Blockinger, GM, Bodnia, E, Boehm, C, Bolozdynya, AI, Bolton, PD, Bottaro, S, Bourgeois, C, Boxer, B, Brás, P, Breskin, A, Breur, PA, Brew, CAJ, Brod, J, Brookes, E, Brown, A, Brown, E, Bruenner, S, Bruno, G, Budnik, R, Bui, TK, Burdin, S, Buse, S, Busenitz, JK, Buttazzo, D, Buuck, M, Buzulutskov, A, Cabrita, R, Cai, C, Cai, D, Capelli, C, Cardoso, JMR, Carmona-Benitez, MC, Cascella, M, and Catena, R

Subjects
Nuclear and Plasma Physics, Particle and High Energy Physics, Physical Sciences, dark matter, neutrinoless double-beta decay, neutrinos, supernova, direct detection, astroparticle physics, xenon, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Nuclear & Particles Physics, Nuclear and plasma physics, Particle and high energy physics
Abstract

The nature of dark matter and properties of neutrinos are among the most pressing issues in contemporary particle physics. The dual-phase xenon time-projection chamber is the leading technology to cover the available parameter space for weakly interacting massive particles, while featuring extensive sensitivity to many alternative dark matter candidates. These detectors can also study neutrinos through neutrinoless double-beta decay and through a variety of astrophysical sources. A next-generation xenon-based detector will therefore be a true multi-purpose observatory to significantly advance particle physics, nuclear physics, astrophysics, solar physics, and cosmology. This review article presents the science cases for such a detector.

Published
2023

3. Cosmogenic production of Ar37 in the context of the LUX-ZEPLIN experiment

Author

Aalbers, J, Akerib, DS, Al Musalhi, AK, Alder, F, Alsum, SK, Amarasinghe, CS, Ames, A, Anderson, TJ, Angelides, N, Araújo, HM, Armstrong, JE, Arthurs, M, Bai, X, Baker, A, Balajthy, J, Balashov, S, Bang, J, Bargemann, JW, Bauer, D, Baxter, A, Beattie, K, Bernard, EP, Bhatti, A, Biekert, A, Biesiadzinski, TP, Birch, HJ, Blockinger, GM, Bodnia, E, Boxer, B, Brew, CAJ, Brás, P, Burdin, S, Busenitz, JK, Buuck, M, Cabrita, R, Carmona-Benitez, MC, Cascella, M, Chan, C, Chawla, A, Chen, H, Chott, NI, Cole, A, Converse, MV, Cottle, A, Cox, G, Creaner, O, Cutter, JE, Dahl, CE, David, A, de Viveiros, L, Dobson, JEY, Druszkiewicz, E, Eriksen, SR, Fan, A, Fayer, S, Fearon, NM, Fiorucci, S, Flaecher, H, Fraser, ED, Fruth, T, Gaitskell, RJ, Genovesi, J, Ghag, C, Gibson, E, Gilchriese, MGD, Gokhale, S, van der Grinten, MGD, Gwilliam, CB, Hall, CR, Haselschwardt, SJ, Hertel, SA, Horn, M, Huang, DQ, Hunt, D, Ignarra, CM, Jahangir, O, James, RS, Ji, W, Johnson, J, Kaboth, AC, Kamaha, AC, Kamdin, K, Khaitan, D, Khazov, A, Khurana, I, Kodroff, D, Korley, L, Korolkova, EV, Kraus, H, Kravitz, S, Kreczko, L, Kudryavtsev, VA, Leason, EA, Leonard, DS, Lesko, KT, Levy, C, Lee, J, Lin, J, Lindote, A, and Linehan, R

Subjects
Nuclear and Plasma Physics, Physical Sciences
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.

Published
2022

4. A Next-Generation Liquid Xenon Observatory for Dark Matter and Neutrino Physics

Author

Aalbers, J, Abe, K, Aerne, V, Agostini, F, Maouloud, S Ahmed, Akerib, DS, Akimov, D Yu, Akshat, J, Musalhi, AK Al, Alder, F, Alsum, SK, Althueser, L, Amarasinghe, CS, Amaro, FD, Ames, A, Anderson, TJ, Andrieu, B, Angelides, N, Angelino, E, Angevaare, J, Antochi, VC, Martin, D Antón, Antunovic, B, Aprile, E, Araújo, HM, Armstrong, JE, Arneodo, F, Arthurs, M, Asadi, P, Baek, S, Bai, X, Bajpai, D, Baker, A, Balajthy, J, Balashov, S, Balzer, M, Bandyopadhyay, A, Bang, J, Barberio, E, Bargemann, JW, Baudis, L, Bauer, D, Baur, D, Baxter, A, Baxter, AL, Bazyk, M, Beattie, K, Behrens, J, Bell, NF, Bellagamba, L, Beltrame, P, Benabderrahmane, M, Bernard, EP, Bertone, GF, Bhattacharjee, P, Bhatti, A, Biekert, A, Biesiadzinski, TP, Binau, AR, Biondi, R, Biondi, Y, Birch, HJ, Bishara, F, Bismark, A, Blanco, C, Blockinger, GM, Bodnia, E, Boehm, C, Bolozdynya, AI, Bolton, PD, Bottaro, S, Bourgeois, C, Boxer, B, Brás, P, Breskin, A, Breur, PA, Brew, CAJ, Brod, J, Brookes, E, Brown, A, Brown, E, Bruenner, S, Bruno, G, Budnik, R, Bui, TK, Burdin, S, Buse, S, Busenitz, JK, Buttazzo, D, Buuck, M, Buzulutskov, A, Cabrita, R, Cai, C, Cai, D, Capelli, C, Cardoso, JMR, Carmona-Benitez, MC, Cascella, M, Catena, R, and Chakraborty, S

Subjects
Nuclear and Plasma Physics, Particle and High Energy Physics, Physical Sciences, physics.ins-det, astro-ph.CO, hep-ex, nucl-ex
Abstract

The nature of dark matter and properties of neutrinos are among the mostpressing issues in contemporary particle physics. The dual-phase xenontime-projection chamber is the leading technology to cover the availableparameter space for Weakly Interacting Massive Particles (WIMPs), whilefeaturing extensive sensitivity to many alternative dark matter candidates.These detectors can also study neutrinos through neutrinoless double-beta decayand through a variety of astrophysical sources. A next-generation xenon-baseddetector will therefore be a true multi-purpose observatory to significantlyadvance particle physics, nuclear physics, astrophysics, solar physics, andcosmology. This review article presents the science cases for such a detector.

Published
2022

5. Erratum to: The LUX-ZEPLIN (LZ) radioactivity and cleanliness control programs

Author

Akerib, DS, Akerlof, CW, Akimov, D Yu, Alquahtani, A, Alsum, SK, Anderson, TJ, Angelides, N, Araújo, HM, Arbuckle, A, Armstrong, JE, Arthurs, M, Auyeung, H, Aviles, S, Bai, X, Bailey, AJ, Balajthy, J, Balashov, S, Bang, J, Barry, MJ, Bauer, D, Bauer, P, Baxter, A, Belle, J, Beltrame, P, Bensinger, J, Benson, T, Bernard, EP, Bernstein, A, Bhatti, A, Biekert, A, Biesiadzinski, TP, Birch, HJ, Birrittella, B, Boast, KE, Bolozdynya, AI, Boulton, EM, Boxer, B, Bramante, R, Branson, S, Brás, P, Breidenbach, M, Brew, CAJ, Buckley, JH, Bugaev, VV, Bunker, R, Burdin, S, Busenitz, JK, Cabrita, R, Campbell, JS, Carels, C, Carlsmith, DL, Carlson, B, Carmona-Benitez, MC, Cascella, M, Chan, C, Cherwinka, JJ, Chiller, AA, Chiller, C, Chott, NI, Cole, A, Coleman, J, Colling, D, Conley, RA, Cottle, A, Coughlen, R, Cox, G, Craddock, WW, Curran, D, Currie, A, Cutter, JE, da Cunha, JP, Dahl, CE, Dardin, S, Dasu, S, Davis, J, Davison, TJR, de Viveiros, L, Decheine, N, Dobi, A, Dobson, JEY, Druszkiewicz, E, Dushkin, A, Edberg, TK, Edwards, WR, Edwards, BN, Edwards, J, Elnimr, MM, Emmet, WT, Eriksen, SR, Faham, CH, Fan, A, Fayer, S, Fiorucci, S, Flaecher, H, Florang, IM Fogarty, Ford, P, Francis, VB, Fraser, ED, Froborg, F, and Fruth, T

Subjects
Particle and High Energy Physics, Astronomical Sciences, Atomic, Molecular and Optical Physics, Physical Sciences, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Quantum Physics, Nuclear & Particles Physics, Astronomical sciences, Atomic, molecular and optical physics, Particle and high energy physics
Abstract

The reference to the article is Manuscript ID EPJC-20-06-042 from the internal review perspective. The reference to the article as published, is: (Table presented.).

Published
2022

6. Projected sensitivity of the LUX-ZEPLIN experiment to the two-neutrino and neutrinoless double β decays of Xe134

Author

Akerib, DS, Al Musalhi, AK, Alsum, SK, Amarasinghe, CS, Ames, A, Anderson, TJ, Angelides, N, Araújo, HM, Armstrong, JE, Arthurs, M, Bai, X, Balajthy, J, Balashov, S, Bang, J, Bargemann, JW, Bauer, D, Baxter, A, Beltrame, P, Bernard, EP, Bernstein, A, Bhatti, A, Biekert, A, Biesiadzinski, TP, Birch, HJ, Blockinger, GM, Bodnia, E, Boxer, B, Brew, CAJ, Brás, P, Burdin, S, Busenitz, JK, Buuck, M, Cabrita, R, Carmona-Benitez, MC, Cascella, M, Chan, C, Chott, NI, Cole, A, Converse, MV, Cottle, A, Cox, G, Creaner, O, Cutter, JE, Dahl, CE, de Viveiros, L, Dobson, JEY, Druszkiewicz, E, Eriksen, SR, Fan, A, Fayer, S, Fearon, NM, Fiorucci, S, Flaecher, H, Fraser, ED, Fruth, T, Gaitskell, RJ, Genovesi, J, Ghag, C, Gibson, E, Gokhale, S, van der Grinten, MGD, Gwilliam, CB, Hall, CR, Haselschwardt, SJ, Hertel, SA, Horn, M, Huang, DQ, gnarra, MCI, Jahangir, O, James, RS, Ji, W, Johnson, J, Kaboth, AC, Kamaha, AC, Kamdin, K, Kazkaz, K, Khaitan, D, Khazov, A, Khurana, I, Kodroff, D, Korley, L, Korolkova, EV, Kraus, H, Kravitz, S, Kreczko, L, Krikler, B, Kudryavtsev, VA, Leason, EA, Lee, J, Leonard, DS, Lesko, KT, Levy, C, Liao, J, Lin, J, Lindote, A, Linehan, R, Lippincott, WH, Liu, X, Lopes, MI, and Asamar, E López

Subjects
Nuclear and Plasma Physics, Particle and High Energy Physics, Physical Sciences, Nuclear and plasma physics
Abstract

The projected sensitivity of the LUX-ZEPLIN (LZ) experiment to two-neutrino and neutrinoless double β decay of Xe134 is presented. LZ is a 10-tonne xenon time-projection chamber optimized for the detection of dark matter particles and is expected to start operating in 2021 at Sanford Underground Research Facility, USA. Its large mass of natural xenon provides an exceptional opportunity to search for the double β decay of Xe134, for which xenon detectors enriched in Xe136 are less effective. For the two-neutrino decay mode, LZ is predicted to exclude values of the half-life up to 1.7×1024 years at 90% confidence level (CL) and has a three-sigma observation potential of 8.7×1023 years, approaching the predictions of nuclear models. For the neutrinoless decay mode LZ, is projected to exclude values of the half-life up to 7.3×1024 years at 90% CL.

Published
2021

7. Projected sensitivities of the LUX-ZEPLIN experiment to new physics via low-energy electron recoils

Author

Akerib, DS, Al Musalhi, AK, Alsum, SK, Amarasinghe, CS, Ames, A, Anderson, TJ, Angelides, N, Araújo, HM, Armstrong, JE, Arthurs, M, Bai, X, Balajthy, J, Balashov, S, Bang, J, Bargemann, JW, Bauer, D, Baxter, A, Beltrame, P, Bernard, EP, Bernstein, A, Bhatti, A, Biekert, A, Biesiadzinski, TP, Birch, HJ, Blockinger, GM, Bodnia, E, Boxer, B, Brew, CAJ, Brás, P, Burdin, S, Busenitz, JK, Buuck, M, Cabrita, R, Carmona-Benitez, MC, Cascella, M, Chan, C, Chott, NI, Cole, A, Converse, MV, Cottle, A, Cox, G, Creaner, O, Cutter, JE, Dahl, CE, de Viveiros, L, Dobson, JEY, Druszkiewicz, E, Eriksen, SR, Fan, A, Fayer, S, Fearon, NM, Fiorucci, S, Flaecher, H, Fraser, ED, Fruth, T, Gaitskell, RJ, Genovesi, J, Ghag, C, Gibson, E, Gokhale, S, van der Grinten, MGD, Gwilliam, CB, Hall, CR, Hardy, CA, Haselschwardt, SJ, Hertel, SA, Horn, M, Huang, DQ, Ignarra, CM, Jahangir, O, James, RS, Ji, W, Johnson, J, Kaboth, AC, Kamaha, AC, Kamdin, K, Kazkaz, K, Khaitan, D, Khazov, A, Khurana, I, Kodroff, D, Korley, L, Korolkova, EV, Kraus, H, Kravitz, S, Kreczko, L, Krikler, B, Kudryavtsev, VA, Leason, EA, Lee, J, Leonard, DS, Lesko, KT, Levy, C, Li, J, Liao, J, Lindote, A, Linehan, R, Lippincott, WH, Liu, X, and Lopes, MI

Subjects
Nuclear and Plasma Physics, Particle and High Energy Physics, Physical Sciences
Abstract

LUX-ZEPLIN is a dark matter detector expected to obtain world-leading sensitivity to weakly-interacting massive particles interacting via nuclear recoils with a ∼7-tonne xenon target mass. This paper presents sensitivity projections to several low-energy signals of the complementary electron recoil signal type: 1) an effective neutrino magnetic moment, and 2) an effective neutrino millicharge, both for pp-chain solar neutrinos, 3) an axion flux generated by the Sun, 4) axionlike particles forming the Galactic dark matter, 5) hidden photons, 6) mirror dark matter, and 7) leptophilic dark matter. World-leading sensitivities are expected in each case, a result of the large 5.6 t 1000 d exposure and low expected rate of electron-recoil backgrounds in the

Published
2021

8. Projected sensitivity of the LUX-ZEPLIN (LZ) experiment to the two-neutrino and neutrinoless double beta decays of $^{134}$Xe

Author

LUX-ZEPLIN, The, Collaboration, Akerib, DS, Musalhi, AK Al, Alsum, SK, Amarasinghe, CS, Ames, A, Anderson, TJ, Angelides, N, Araujo, HM, Armstrong, JE, Arthurs, M, Bai, X, Balajthy, J, Balashov, S, Bang, J, Bargemann, JW, Bauer, D, Baxter, A, Beltrame, P, Bernard, EP, Bernstein, A, Bhatti, A, Biekert, A, Biesiadzinski, TP, Birch, HJ, Blockinger, GM, Bodnia, E, Boxer, B, Brew, CAJ, Bras, P, Burdin, S, Busenitz, JK, Buuck, M, Cabrita, R, Carmona-Benitez, MC, Cascella, M, Chan, C, Chott, NI, Cole, A, Converse, MV, Cottle, A, Cox, G, Creaner, O, Cutter, JE, Dahl, CE, Viveiros, L de, Dobson, JEY, Druszkiewicz, E, Eriksen, SR, Fan, A, Fayer, S, Fearon, NM, Fiorucci, S, Flaecher, H, Fraser, ED, Fruth, T, Gaitskell, RJ, Genovesi, J, Ghag, C, Gibson, E, Gokhale, S, Grinten, MGD van der, Gwilliam, CB, Hall, CR, Haselschwardt, SJ, Hertel, SA, Horn, M, Huang, DQ, Ignarra, CM, Jahangir, O, James, RS, Ji, W, Johnson, J, Kaboth, AC, Kamaha, AC, Kamdin, K, Kazkaz, K, Khaitan, D, Khazov, A, Khurana, I, Kodroff, D, Korley, L, Korolkova, EV, Kraus, H, Kravitz, S, Kreczko, L, Krikler, B, Kudryavtsev, VA, Leason, EA, Lee, J, Leonard, DS, Lesko, KT, Levy, C, Liao, J, Lin, J, Lindote, A, Linehan, R, Lippincott, WH, and Liu, X

Subjects
physics.ins-det, nucl-ex
Abstract

The projected sensitivity of the LUX-ZEPLIN (LZ) experiment to two-neutrinoand neutrinoless double beta decay of $^{134}$Xe is presented. LZ is a 10-tonnexenon time projection chamber optimized for the detection of dark matterparticles, that is expected to start operating in 2021 at Sanford UndergroundResearch Facility, USA. Its large mass of natural xenon provides an exceptionalopportunity to search for the double beta decay of $^{134}$Xe, for which xenondetectors enriched in $^{136}$Xe are less effective. For the two-neutrino decaymode, LZ is predicted to exclude values of the half-life up to1.7$\times$10$^{24}$ years at 90% confidence level (CL), and has a three-sigmaobservation potential of 8.7$\times$10$^{23}$ years, approaching thepredictions of nuclear models. For the neutrinoless decay mode LZ, is projectedto exclude values of the half-life up to 7.3$\times$10$^{24}$ years at 90% CL.

Published
2021

9. Projected sensitivities of the LUX-ZEPLIN (LZ) experiment to new physics via low-energy electron recoils

Author

Collaboration, The LZ, Akerib, DS, Musalhi, AK Al, Alsum, SK, Amarasinghe, CS, Ames, A, Anderson, TJ, Angelides, N, Araújo, HM, Armstrong, JE, Arthurs, M, Bai, X, Balajthy, J, Balashov, S, Bang, J, Bargemann, JW, Bauer, D, Baxter, A, Beltrame, P, Bernard, EP, Bernstein, A, Bhatti, A, Biekert, A, Biesiadzinski, TP, Birch, HJ, Blockinger, GM, Bodnia, E, Boxer, B, Brew, CAJ, Brás, P, Burdin, S, Busenitz, JK, Buuck, M, Cabrita, R, Carmona-Benitez, MC, Cascella, M, Chan, C, Chott, NI, Cole, A, Converse, MV, Cottle, A, Cox, G, Creaner, O, Cutter, JE, Dahl, CE, Viveiros, L de, Dobson, JEY, Druszkiewicz, E, Eriksen, SR, Fan, A, Fayer, S, Fearon, NM, Fiorucci, S, Flaecher, H, Fraser, ED, Fruth, T, Gaitskell, RJ, Genovesi, J, Ghag, C, Gibson, E, Gokhale, S, Grinten, MGD van der, Gwilliam, CB, Hall, CR, Hardy, CA, Haselschwardt, SJ, Hertel, SA, Horn, M, Huang, DQ, Ignarra, CM, Jahangir, O, James, RS, Ji, W, Johnson, J, Kaboth, AC, Kamaha, AC, Kamdin, K, Kazkaz, K, Khaitan, D, Khazov, A, Khurana, I, Kodroff, D, Korley, L, Korolkova, EV, Kraus, H, Kravitz, S, Kreczko, L, Krikler, B, Kudryavtsev, VA, Leason, EA, Lee, J, Leonard, DS, Lesko, KT, Levy, C, Li, J, Liao, J, Lindote, A, Linehan, R, Lippincott, WH, and Liu, X

Subjects
hep-ex, astro-ph.CO, hep-ph
Abstract

LUX-ZEPLIN (LZ) is a dark matter detector expected to obtain world-leadingsensitivity to weakly interacting massive particles (WIMPs) interacting vianuclear recoils with a ~7-tonne xenon target mass. This manuscript presentssensitivity projections to several low-energy signals of the complementaryelectron recoil signal type: 1) an effective neutrino magnetic moment and 2) aneffective neutrino millicharge, both for pp-chain solar neutrinos, 3) an axionflux generated by the Sun, 4) axion-like particles forming the galactic darkmatter, 5) hidden photons, 6) mirror dark matter, and 7) leptophilic darkmatter. World-leading sensitivities are expected in each case, a result of thelarge 5.6t 1000d exposure and low expected rate of electron recoil backgroundsin the $

Published
2021

10. Simulations of events for the LUX-ZEPLIN (LZ) dark matter experiment

Author

Akerib, DS, Akerlof, CW, Alqahtani, A, Alsum, SK, Anderson, TJ, Angelides, N, Araújo, HM, Armstrong, JE, Arthurs, M, Bai, X, Balajthy, J, Balashov, S, Bang, J, Bauer, D, Baxter, A, Bensinger, J, Bernard, EP, Bernstein, A, Bhatti, A, Biekert, A, Biesiadzinski, TP, Birch, HJ, Boast, KE, Boxer, B, Brás, P, Buckley, JH, Bugaev, VV, Burdin, S, Busenitz, JK, Cabrita, R, Carels, C, Carlsmith, DL, Carmona-Benitez, MC, Cascella, M, Chan, C, Chott, NI, Cole, A, Cottle, A, Cutter, JE, Dahl, CE, de Viveiros, L, Dobson, JEY, Druszkiewicz, E, Edberg, TK, Eriksen, SR, Fan, A, Fayer, S, Fiorucci, S, Flaecher, H, Fraser, ED, Fruth, T, Gaitskell, RJ, Genovesi, J, Ghag, C, Gibson, E, Gilchriese, MGD, Gokhale, S, van der Grinten, MGD, Hall, CR, Harrison, A, Haselschwardt, SJ, Hertel, SA, Hor, JY-K, Horn, M, Huang, DQ, Ignarra, CM, Jahangir, O, Ji, W, Johnson, J, Kaboth, AC, Kamaha, AC, Kamdin, K, Kazkaz, K, Khaitan, D, Khazov, A, Khurana, I, Kocher, CD, Korley, L, Korolkova, EV, Kras, J, Kraus, H, Kravitz, S, Kreczko, L, Krikler, B, Kudryavtsev, VA, Leason, EA, Lee, J, Leonard, DS, Lesko, KT, Levy, C, Li, J, Liao, J, Liao, F-T, Lin, J, Lindote, A, Linehan, R, Lippincott, WH, Liu, R, Liu, X, and Loniewski, C

Subjects
Nuclear and Plasma Physics, Particle and High Energy Physics, Physical Sciences, physics.ins-det, hep-ex, Astronomical and Space Sciences, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Nuclear & Particles Physics, Astronomical sciences, Particle and high energy physics
Abstract

The LUX-ZEPLIN dark matter search aims to achieve a sensitivity to the WIMP-nucleon spin-independent cross-section down to (1–2)×10−12 pb at a WIMP mass of 40 GeV/c2. This paper describes the simulations framework that, along with radioactivity measurements, was used to support this projection, and also to provide mock data for validating reconstruction and analysis software. Of particular note are the event generators, which allow us to model the background radiation, and the detector response physics used in the production of raw signals, which can be converted into digitized waveforms similar to data from the operational detector. Inclusion of the detector response allows us to process simulated data using the same analysis routines as developed to process the experimental data.

Published
2021

11. Enhancing the sensitivity of the LUX-ZEPLIN (LZ) dark matter experiment to low energy signals

Author

Akerib, DS, Musalhi, AK Al, Alsum, SK, Amarasinghe, CS, Ames, A, Anderson, TJ, Angelides, N, Araújo, HM, Armstrong, JE, Arthurs, M, Bai, X, Balajthy, J, Balashov, S, Bang, J, Bargemann, JW, Bauer, D, Baxter, A, Beltrame, P, Bernard, EP, Bernstein, A, Bhatti, A, Biekert, A, Biesiadzinski, TP, Birch, HJ, Blockinger, GM, Boxer, B, Brew, CAJ, Brás, P, Burdin, S, Busenitz, JK, Buuck, M, Cabrita, R, Carmona-Benitez, MC, Cascella, M, Chan, C, Chott, NI, Cole, A, Converse, MV, Cottle, A, Cox, G, Cutter, JE, Dahl, CE, Viveiros, L de, Dobson, JEY, Druszkiewicz, E, Eriksen, SR, Fan, A, Fayer, S, Fearon, NM, Fiorucci, S, Flaecher, H, Fraser, ED, Fruth, T, Gaitskell, RJ, Genovesi, J, Ghag, C, Gibson, E, Gokhale, S, Grinten, MGD van der, Gwilliam, CB, Hall, CR, Haselschwardt, SJ, Hertel, SA, Horn, M, Huang, DQ, Ignarra, CM, Jahangir, O, James, RS, Ji, W, Johnson, J, Kaboth, AC, Kamaha, AC, Kamdin, K, Kazkaz, K, Khaitan, D, Khazov, A, Khurana, I, Kodroff, D, Korley, L, Korolkova, EV, Kraus, H, Kravitz, S, Kreczko, L, Krikler, B, Kudryavtsev, VA, Leason, EA, Lesko, KT, Levy, C, Li, J, Liao, J, Lin, J, Lindote, A, Linehan, R, Lippincott, WH, Liu, X, Lopes, MI, Asamar, E Lopez, Paredes, B López, Lorenzon, W, and Luitz, S

Subjects
astro-ph.IM, physics.ins-det
Abstract

Two-phase xenon detectors, such as that at the core of the forthcoming LZdark matter experiment, use photomultiplier tubes to sense the primary (S1) andsecondary (S2) scintillation signals resulting from particle interactions intheir liquid xenon target. This paper describes a simulation study exploringtwo techniques to lower the energy threshold of LZ to gain sensitivity tolow-mass dark matter and astrophysical neutrinos, which will be applicable toother liquid xenon detectors. The energy threshold is determined by the numberof detected S1 photons; typically, these must be recorded in three or morephotomultiplier channels to avoid dark count coincidences that mimic realsignals. To lower this threshold: a) we take advantage of the doublephotoelectron emission effect, whereby a single vacuum ultraviolet photon has a$\sim20\%$ probability of ejecting two photoelectrons from a photomultipliertube photocathode; and b) we drop the requirement of an S1 signal altogether,and use only the ionization signal, which can be detected more efficiently. Forboth techniques we develop signal and background models for the nominalexposure, and explore accompanying systematic effects, including the dependenceon the free electron lifetime in the liquid xenon. When incorporating doublephotoelectron signals, we predict a factor of $\sim 4$ sensitivity improvementto the dark matter-nucleon scattering cross-section at $2.5$ GeV/c$^2$, and afactor of $\sim1.6$ increase in the solar $^8$B neutrino detection rate.Dropping the S1 requirement may allow sensitivity gains of two orders ofmagnitude in both cases. Finally, we apply these techniques to even lowermasses by taking into account the atomic Migdal effect; this could lower thedark matter particle mass threshold to $80$ MeV/c$^2$.

Published
2021

12. The LUX-ZEPLIN (LZ) radioactivity and cleanliness control programs

Author

Akerib, DS, Akerlof, CW, Akimov, D Yu, Alquahtani, A, Alsum, SK, Anderson, TJ, Angelides, N, Araújo, HM, Arbuckle, A, Armstrong, JE, Arthurs, M, Auyeung, H, Aviles, S, Bai, X, Bailey, AJ, Balajthy, J, Balashov, S, Bang, J, Barry, MJ, Bauer, D, Bauer, P, Baxter, A, Belle, J, Beltrame, P, Bensinger, J, Benson, T, Bernard, EP, Bernstein, A, Bhatti, A, Biekert, A, Biesiadzinski, TP, Birch, HJ, Birrittella, B, Boast, KE, Bolozdynya, AI, Boulton, EM, Boxer, B, Bramante, R, Branson, S, Brás, P, Breidenbach, M, Brew, CAJ, Buckley, JH, Bugaev, VV, Bunker, R, Burdin, S, Busenitz, JK, Cabrita, R, Campbell, JS, Carels, C, Carlsmith, DL, Carlson, B, Carmona-Benitez, MC, Cascella, M, Chan, C, Cherwinka, JJ, Chiller, AA, Chiller, C, Chott, NI, Cole, A, Coleman, J, Colling, D, Conley, RA, Cottle, A, Coughlen, R, Cox, G, Craddock, WW, Curran, D, Currie, A, Cutter, JE, da Cunha, JP, Dahl, CE, Dardin, S, Dasu, S, Davis, J, Davison, TJR, de Viveiros, L, Decheine, N, Dobi, A, Dobson, JEY, Druszkiewicz, E, Dushkin, A, Edberg, TK, Edwards, WR, Edwards, BN, Edwards, J, Elnimr, MM, Emmet, WT, Eriksen, SR, Faham, CH, Fan, A, Fayer, S, Fiorucci, S, Flaecher, H, Florang, IM Fogarty, Ford, P, Francis, VB, Fraser, ED, Froborg, F, and Fruth, T

Subjects
Nuclear and Plasma Physics, Physical Sciences, physics.ins-det, hep-ex, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Quantum Physics, Nuclear & Particles Physics, Astronomical sciences, Atomic, molecular and optical physics, Particle and high energy physics
Abstract

LUX-ZEPLIN (LZ) is a second-generation direct dark matter experiment with spin-independent WIMP-nucleon scattering sensitivity above 1.4×10-48cm2 for a WIMP mass of 40GeV/c2 and a 1000days exposure. LZ achieves this sensitivity through a combination of a large 5.6t fiducial volume, active inner and outer veto systems, and radio-pure construction using materials with inherently low radioactivity content. The LZ collaboration performed an extensive radioassay campaign over a period of six years to inform material selection for construction and provide an input to the experimental background model against which any possible signal excess may be evaluated. The campaign and its results are described in this paper. We present assays of dust and radon daughters depositing on the surface of components as well as cleanliness controls necessary to maintain background expectations through detector construction and assembly. Finally, examples from the campaign to highlight fixed contaminant radioassays for the LZ photomultiplier tubes, quality control and quality assurance procedures through fabrication, radon emanation measurements of major sub-systems, and bespoke detector systems to assay scintillator are presented.

Published
2020

13. Projected sensitivity of the LUX-ZEPLIN experiment to the 0νββ decay of Xe136

Author

Akerib, DS, Akerlof, CW, Alqahtani, A, Alsum, SK, Anderson, TJ, Angelides, N, Araújo, HM, Armstrong, JE, Arthurs, M, Bai, X, Balajthy, J, Balashov, S, Bang, J, Baxter, A, Bensinger, J, Bernard, EP, Bernstein, A, Bhatti, A, Biekert, A, Biesiadzinski, TP, Birch, HJ, Boast, KE, Boxer, B, Brás, P, Buckley, JH, Bugaev, VV, Burdin, S, Busenitz, JK, Cabrita, R, Carels, C, Carlsmith, DL, Carmona-Benitez, MC, Cascella, M, Chan, C, Chott, NI, Cole, A, Cottle, A, Cutter, JE, Dahl, CE, de Viveiros, L, Dobson, JEY, Druszkiewicz, E, Edberg, TK, Eriksen, SR, Fan, A, Fiorucci, S, Flaecher, H, Fraser, ED, Fruth, T, Gaitskell, RJ, Genovesi, J, Ghag, C, Gibson, E, Gilchriese, MGD, Gokhale, S, van der Grinten, MGD, Hall, CR, Harrison, A, Haselschwardt, SJ, Hertel, SA, Hor, JY-K, Horn, M, Huang, DQ, Ignarra, CM, Jahangir, O, Ji, W, Johnson, J, Kaboth, AC, Kamaha, AC, Kamdin, K, Kazkaz, K, Khaitan, D, Khazov, A, Khurana, I, Kocher, CD, Korley, L, Korolkova, EV, Kras, J, Kraus, H, Kravitz, S, Kreczko, L, Krikler, B, Kudryavtsev, VA, Leason, EA, Lee, J, Leonard, DS, Lesko, KT, Levy, C, Li, J, Liao, J, Liao, F-T, Lin, J, Lindote, A, Linehan, R, Lippincott, WH, Liu, R, Liu, X, Loniewski, C, Lopes, MI, and Paredes, B López

Subjects
Nuclear and Plasma Physics, Particle and High Energy Physics, Physical Sciences, nucl-ex, Nuclear and plasma physics
Abstract

The LUX-ZEPLIN (LZ) experiment will enable a neutrinoless double β decay search in parallel to the main science goal of discovering dark matter particle interactions. We report the expected LZ sensitivity to Xe136 neutrinoless double β decay, taking advantage of the significant (>600 kg) Xe136 mass contained within the active volume of LZ without isotopic enrichment. After 1000 live-days, the median exclusion sensitivity to the half-life of Xe136 is projected to be 1.06×1026 years (90% confidence level), similar to existing constraints. We also report the expected sensitivity of a possible subsequent dedicated exposure using 90% enrichment with Xe136 at 1.06×1027 years.

Published
2020

14. Measurement of the gamma ray background in the Davis cavern at the Sanford Underground Research Facility

Author

Akerib, DS, Akerlof, CW, Alsum, SK, Angelides, N, Araújo, HM, Armstrong, JE, Arthurs, M, Bai, X, Balajthy, J, Balashov, S, Baxter, A, Bernard, EP, Biekert, A, Biesiadzinski, TP, Boast, KE, Boxer, B, Brás, P, Buckley, JH, Bugaev, VV, Burdin, S, Busenitz, JK, Carels, C, Carlsmith, DL, Carmona-Benitez, MC, Cascella, M, Chan, C, Cole, A, Cottle, A, Cutter, JE, Dahl, CE, de Viveiros, L, Dobson, JEY, Druszkiewicz, E, Edberg, TK, Fan, A, Fiorucci, S, Flaecher, H, Fruth, T, Gaitskell, RJ, Genovesi, J, Ghag, C, Gilchriese, MGD, Gokhale, S, van der Grinten, MGD, Hall, CR, Hans, S, Harrison, J, Haselschwardt, SJ, Hertel, SA, Hor, JYK, Horn, M, Huang, DQ, Ignarra, CM, Jahangir, O, Ji, W, Johnson, J, Kaboth, AC, Kamdin, K, Khaitan, D, Khazov, A, Kim, WT, Kocher, CD, Korley, L, Korolkova, EV, Kras, J, Kraus, H, Kravitz, SW, Kreczko, L, Krikler, B, Kudryavtsev, VA, Leason, EA, Lee, J, Leonard, DS, Lesko, KT, Levy, C, Li, J, Liao, J, Liao, FT, Lin, J, Lindote, A, Linehan, R, Lippincott, WH, Liu, R, Liu, X, Loniewski, C, Lopes, MI, López Paredes, B, Lorenzon, W, Luitz, S, Lyle, JM, Majewski, PA, Manalaysay, A, Manenti, L, Mannino, RL, Marangou, N, Marzioni, MF, McKinsey, DN, McLaughlin, J, Meng, Y, and Miller, EH

Subjects
Dark matter, Low background, Radiation, Underground, Gamma rays, Gamma spectroscopy, physics.ins-det, hep-ex, Nuclear & Particles Physics, Astronomical and Space Sciences, Atomic, Molecular, Nuclear, Particle and Plasma Physics
Abstract

Deep underground environments are ideal for low background searches due to the attenuation of cosmic rays by passage through the earth. However, they are affected by backgrounds from γ-rays emitted by 40K and the 238U and 232Th decay chains in the surrounding rock. The LUX-ZEPLIN (LZ) experiment will search for dark matter particle interactions with a liquid xenon TPC located within the Davis campus at the Sanford Underground Research Facility, Lead, South Dakota, at the 4850-foot level. In order to characterise the cavern background, in-situ γ-ray measurements were taken with a sodium iodide detector in various locations and with lead shielding. The integral count rates (0–3300 keV) varied from 596 Hz to 1355 Hz for unshielded measurements, corresponding to a total flux from the cavern walls of 1.9 ± 0.4 γ cm−2s−1. The resulting activity in the walls of the cavern can be characterised as 220 ± 60 Bq/kg of 40K, 29 ± 15 Bq/kg of 238U, and 13 ± 3 Bq/kg of 232Th.

Published
2020

15. Projected WIMP sensitivity of the LUX-ZEPLIN dark matter experiment

Author

Akerib, DS, Akerlof, CW, Alsum, SK, Araújo, HM, Arthurs, M, Bai, X, Bailey, AJ, Balajthy, J, Balashov, S, Bauer, D, Belle, J, Beltrame, P, Benson, T, Bernard, EP, Biesiadzinski, TP, Boast, KE, Boxer, B, Brás, P, Buckley, JH, Bugaev, VV, Burdin, S, Busenitz, JK, Carels, C, Carlsmith, DL, Carlson, B, Carmona-Benitez, MC, Chan, C, Cherwinka, JJ, Cole, A, Cottle, A, Craddock, WW, Currie, A, Cutter, JE, Dahl, CE, de Viveiros, L, Dobi, A, Dobson, JEY, Druszkiewicz, E, Edberg, TK, Edwards, WR, Fan, A, Fayer, S, Fiorucci, S, Fruth, T, Gaitskell, RJ, Genovesi, J, Ghag, C, Gilchriese, MGD, van der Grinten, MGD, Hall, CR, Hans, S, Hanzel, K, Haselschwardt, SJ, Hertel, SA, Hillbrand, S, Hjemfelt, C, Hoff, MD, Hor, JY-K, Huang, DQ, Ignarra, CM, Ji, W, Kaboth, AC, Kamdin, K, Keefner, J, Khaitan, D, Khazov, A, Kim, YD, Kocher, CD, Korolkova, EV, Kraus, H, Krebs, HJ, Kreczko, L, Krikler, B, Kudryavtsev, VA, Kyre, S, Lee, J, Lenardo, BG, Leonard, DS, Lesko, KT, Levy, C, Li, J, Liao, J, Liao, F-T, Lin, J, Lindote, A, Linehan, R, Lippincott, WH, Liu, X, Lopes, MI, Paredes, B López, Lorenzon, W, Luitz, S, Lyle, JM, Majewski, P, Manalaysay, A, Mannino, RL, Maupin, C, McKinsey, DN, Meng, Y, and Miller, EH

Subjects
Nuclear and Plasma Physics, Particle and High Energy Physics, Physical Sciences, astro-ph.IM, astro-ph.CO, hep-ex, physics.ins-det
Abstract

LUX-ZEPLIN (LZ) is a next-generation dark matter direct detection experiment that will operate 4850 feet underground at the Sanford Underground Research Facility (SURF) in Lead, South Dakota, USA. Using a two-phase xenon detector with an active mass of 7 tonnes, LZ will search primarily for low-energy interactions with weakly interacting massive particles (WIMPs), which are hypothesized to make up the dark matter in our galactic halo. In this paper, the projected WIMP sensitivity of LZ is presented based on the latest background estimates and simulations of the detector. For a 1000 live day run using a 5.6-tonne fiducial mass, LZ is projected to exclude at 90% confidence level spin-independent WIMP-nucleon cross sections above 1.4×10-48 cm2 for a 40 GeV/c2 mass WIMP. Additionally, a 5σ discovery potential is projected, reaching cross sections below the exclusion limits of recent experiments. For spin-dependent WIMP-neutron(-proton) scattering, a sensitivity of 2.3×10-43 cm2 (7.1×10-42 cm2) for a 40 GeV/c2 mass WIMP is expected. With underground installation well underway, LZ is on track for commissioning at SURF in 2020.

Published
2020

16. The LUX-ZEPLIN (LZ) experiment

Author

Akerib, DS, Akerlof, CW, Akimov, DY, Alquahtani, A, Alsum, SK, Anderson, TJ, Angelides, N, Araújo, HM, Arbuckle, A, Armstrong, JE, Arthurs, M, Auyeung, H, Bai, X, Bailey, AJ, Balajthy, J, Balashov, S, Bang, J, Barry, MJ, Barthel, J, Bauer, D, Bauer, P, Baxter, A, Belle, J, Beltrame, P, Bensinger, J, Benson, T, Bernard, EP, Bernstein, A, Bhatti, A, Biekert, A, Biesiadzinski, TP, Birrittella, B, Boast, KE, Bolozdynya, AI, Boulton, EM, Boxer, B, Bramante, R, Branson, S, Brás, P, Breidenbach, M, Buckley, JH, Bugaev, VV, Bunker, R, Burdin, S, Busenitz, JK, Campbell, JS, Carels, C, Carlsmith, DL, Carlson, B, Carmona-Benitez, MC, Cascella, M, Chan, C, Cherwinka, JJ, Chiller, AA, Chiller, C, Chott, NI, Cole, A, Coleman, J, Colling, D, Conley, RA, Cottle, A, Coughlen, R, Craddock, WW, Curran, D, Currie, A, Cutter, JE, da Cunha, JP, Dahl, CE, Dardin, S, Dasu, S, Davis, J, Davison, TJR, de Viveiros, L, Decheine, N, Dobi, A, Dobson, JEY, Druszkiewicz, E, Dushkin, A, Edberg, TK, Edwards, WR, Edwards, BN, Edwards, J, Elnimr, MM, Emmet, WT, Eriksen, SR, Faham, CH, Fan, A, Fayer, S, Fiorucci, S, Flaecher, H, Fogarty Florang, IM, Ford, P, Francis, VB, Froborg, F, Fruth, T, Gaitskell, RJ, Gantos, NJ, Garcia, D, Geffre, A, and Gehman, VM

Subjects
Dark matter detector, Liquid xenon, Time projection chamber, Underground, physics.ins-det, astro-ph.IM, hep-ex, Nuclear & Particles Physics, Astronomical and Space Sciences, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Other Physical Sciences
Abstract

We describe the design and assembly of the LUX-ZEPLIN experiment, a direct detection search for cosmic WIMP dark matter particles. The centerpiece of the experiment is a large liquid xenon time projection chamber sensitive to low energy nuclear recoils. Rejection of backgrounds is enhanced by a Xe skin veto detector and by a liquid scintillator Outer Detector loaded with gadolinium for efficient neutron capture and tagging. LZ is located in the Davis Cavern at the 4850’ level of the Sanford Underground Research Facility in Lead, South Dakota, USA. We describe the major subsystems of the experiment and its key design features and requirements.

Published
2020

17. Identification of radiopure titanium for the LZ dark matter experiment and future rare event searches

Author

Akerib, DS, Akerlof, CW, Akimov, DY, Alsum, SK, Araújo, HM, Arnquist, IJ, Arthurs, M, Bai, X, Bailey, AJ, Balajthy, J, Balashov, S, Barry, MJ, Belle, J, Beltrame, P, Benson, T, Bernard, EP, Bernstein, A, Biesiadzinski, TP, Boast, KE, Bolozdynya, A, Boxer, B, Bramante, R, Brás, P, Buckley, JH, Bugaev, VV, Bunker, R, Burdin, S, Busenitz, JK, Carels, C, Carlsmith, DL, Carlson, B, Carmona-Benitez, MC, Chan, C, Cherwinka, JJ, Chiller, AA, Chiller, C, Cottle, A, Coughlen, R, Craddock, WW, Currie, A, Dahl, CE, Davison, TJR, Dobi, A, Dobson, JEY, Druszkiewicz, E, Edberg, TK, Edwards, WR, Emmet, WT, Faham, CH, Fiorucci, S, Fruth, T, Gaitskell, RJ, Gantos, NJ, Gehman, VM, Gerhard, RM, Ghag, C, Gilchriese, MGD, Gomber, B, Hall, CR, Hans, S, Hanzel, K, Haselschwardt, SJ, Hertel, SA, Hillbrand, S, Hjemfelt, C, Hoff, MD, Holbrook, B, Holtom, E, Hoppe, EW, Hor, JYK, Horn, M, Huang, DQ, Hurteau, TW, Ignarra, CM, Jacobsen, RG, Ji, W, Kaboth, A, Kamdin, K, Kazkaz, K, Khaitan, D, Khazov, A, Khromov, AV, Konovalov, AM, Korolkova, EV, Koyuncu, M, Kraus, H, Krebs, HJ, Kudryavtsev, VA, Kumpan, AV, Kyre, S, Lee, C, Lee, HS, Lee, J, Leonard, DS, Leonard, R, Lesko, KT, Levy, C, Liao, FT, Lin, J, and Lindote, A

Subjects
physics.ins-det, hep-ex, Nuclear & Particles Physics, Astronomical and Space Sciences, Atomic, Molecular, Nuclear, Particle and Plasma Physics
Abstract

The LUX-ZEPLIN (LZ) experiment will search for dark matter particle interactions with a detector containing a total of 10 tonnes of liquid xenon within a double-vessel cryostat. The large mass and proximity of the cryostat to the active detector volume demand the use of material with extremely low intrinsic radioactivity. We report on the radioassay campaign conducted to identify suitable metals, the determination of factors limiting radiopure production, and the selection of titanium for construction of the LZ cryostat and other detector components. This titanium has been measured with activities of 238Ue < 1.6 mBq/kg, 238Ul < 0.09 mBq/kg, 232The=0.28±0.03 mBq/kg, 232Thl=0.25±0.02 mBq/kg, 40K < 0.54 mBq/kg, and 60Co < 0.02 mBq/kg (68% CL). Such low intrinsic activities, which are some of the lowest ever reported for titanium, enable its use for future dark matter and other rare event searches. Monte Carlo simulations have been performed to assess the expected background contribution from the LZ cryostat with this radioactivity. In 1,000 days of WIMP search exposure of a 5.6-tonne fiducial mass, the cryostat will contribute only a mean background of 0.160 ± 0.001(stat) ± 0.030(sys) counts.

Published
2017

18. Cosmogenic production of 37 Ar in the context of the LUX-ZEPLIN experiment

Author

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

Subjects
hep-ex, astro-ph.CO, hep-ph, astro-ph.IM
Abstract

We estimate the amount of 37 Ar 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 37 Ar 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 37 Ar 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 37 Ar activity after 10 tons are purified and transported underground is 0.058 − 0.090 μ Bq / kg , depending on the degree of argon removal during above-ground purification. Such cosmogenic 37 Ar 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 37 Ar should be considered when planning for future liquid-xenon-based experiments.

Published
2022

19. Erratum to: The LUX-ZEPLIN (LZ) radioactivity and cleanliness control programs (The European Physical Journal C, (2020), 80, 11, (1044), 10.1140/epjc/s10052-020-8420-x)

Author

Akerib, DS, Akerib, DS, Akerlof, CW, Akimov, DY, Alquahtani, A, Alsum, SK, Anderson, TJ, Angelides, N, Araújo, HM, Arbuckle, A, Armstrong, JE, Arthurs, M, Auyeung, H, Aviles, S, Bai, X, Bailey, AJ, Balajthy, J, Balashov, S, Bang, J, Barry, MJ, Bauer, D, Bauer, P, Baxter, A, Belle, J, Beltrame, P, Bensinger, J, Benson, T, Bernard, EP, Bernstein, A, Bhatti, A, Biekert, A, Biesiadzinski, TP, Birch, HJ, Birrittella, B, Boast, KE, Bolozdynya, AI, Boulton, EM, Boxer, B, Bramante, R, Branson, S, Brás, P, Breidenbach, M, Brew, CAJ, Buckley, JH, Bugaev, VV, Bunker, R, Burdin, S, Busenitz, JK, Cabrita, R, Campbell, JS, Carels, C, Carlsmith, DL, Carlson, B, Carmona-Benitez, MC, Cascella, M, Chan, C, Cherwinka, JJ, Chiller, AA, Chiller, C, Chott, NI, Cole, A, Coleman, J, Colling, D, Conley, RA, Cottle, A, Coughlen, R, Cox, G, Craddock, WW, Curran, D, Currie, A, Cutter, JE, da Cunha, JP, Dahl, CE, Dardin, S, Dasu, S, Davis, J, Davison, TJR, de Viveiros, L, Decheine, N, Dobi, A, Dobson, JEY, Druszkiewicz, E, Dushkin, A, Edberg, TK, Edwards, WR, Edwards, BN, Edwards, J, Elnimr, MM, Emmet, WT, Eriksen, SR, Faham, CH, Fan, A, Fayer, S, Fiorucci, S, Flaecher, H, Florang, IMF, Ford, P, Francis, VB, Fraser, ED, Froborg, F, Fruth, T, Akerib, DS, Akerib, DS, Akerlof, CW, Akimov, DY, Alquahtani, A, Alsum, SK, Anderson, TJ, Angelides, N, Araújo, HM, Arbuckle, A, Armstrong, JE, Arthurs, M, Auyeung, H, Aviles, S, Bai, X, Bailey, AJ, Balajthy, J, Balashov, S, Bang, J, Barry, MJ, Bauer, D, Bauer, P, Baxter, A, Belle, J, Beltrame, P, Bensinger, J, Benson, T, Bernard, EP, Bernstein, A, Bhatti, A, Biekert, A, Biesiadzinski, TP, Birch, HJ, Birrittella, B, Boast, KE, Bolozdynya, AI, Boulton, EM, Boxer, B, Bramante, R, Branson, S, Brás, P, Breidenbach, M, Brew, CAJ, Buckley, JH, Bugaev, VV, Bunker, R, Burdin, S, Busenitz, JK, Cabrita, R, Campbell, JS, Carels, C, Carlsmith, DL, Carlson, B, Carmona-Benitez, MC, Cascella, M, Chan, C, Cherwinka, JJ, Chiller, AA, Chiller, C, Chott, NI, Cole, A, Coleman, J, Colling, D, Conley, RA, Cottle, A, Coughlen, R, Cox, G, Craddock, WW, Curran, D, Currie, A, Cutter, JE, da Cunha, JP, Dahl, CE, Dardin, S, Dasu, S, Davis, J, Davison, TJR, de Viveiros, L, Decheine, N, Dobi, A, Dobson, JEY, Druszkiewicz, E, Dushkin, A, Edberg, TK, Edwards, WR, Edwards, BN, Edwards, J, Elnimr, MM, Emmet, WT, Eriksen, SR, Faham, CH, Fan, A, Fayer, S, Fiorucci, S, Flaecher, H, Florang, IMF, Ford, P, Francis, VB, Fraser, ED, Froborg, F, and Fruth, T

Abstract

The reference to the article is Manuscript ID EPJC-20-06-042 from the internal review perspective. The reference to the article as published, is: (Table presented.).

Published
2022

20. Projected sensitivity of the LUX-ZEPLIN experiment to the two-neutrino and neutrinoless double β decays of 134Xe

Author

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

Published
2021

21. Projected sensitivities of the LUX-ZEPLIN experiment to new physics via low-energy electron recoils

Author

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

Subjects
Physics::Instrumentation and Detectors
Abstract

LUX-ZEPLIN is a dark matter detector expected to obtain world-leading sensitivity to weakly-interacting massive particles interacting via nuclear recoils with a ∼7-tonne xenon target mass. This paper presents sensitivity projections to several low-energy signals of the complementary electron recoil signal type: 1) an effective neutrino magnetic moment, and 2) an effective neutrino millicharge, both for pp-chain solar neutrinos, 3) an axion flux generated by the Sun, 4) axionlike particles forming the Galactic dark matter, 5) hidden photons, 6) mirror dark matter, and 7) leptophilic dark matter. World-leading sensitivities are expected in each case, a result of the large 5.6 t 1000 d exposure and low expected rate of electron-recoil backgrounds in the

Published
2021

22. Projected sensitivity of the LUX-ZEPLIN experiment to the 0νββ decay of ¹³⁶Xe

Author

Akerib, DS, Akerlof, CW, Alqahtani, A, Alsum, SK, Anderson, TJ, Angelides, N, Araujo, HM, Armstrong, JE, Arthurs, M, Bai, X, Balajthy, J, Balashov, S, Bang, J, Baxter, A, Bensinger, J, Bernard, EP, Bernstein, A, Bhatti, A, Biekert, A, Biesiadzinski, TP, Birch, HJ, Boast, KE, Boxer, B, Bras, P, Buckley, JH, Bugaev, VV, Burdin, S, Busenitz, JK, Cabrita, R, Carels, C, Carlsmith, DL, Carmona-Benitez, MC, Cascella, M, Chan, C, Chott, NI, Cole, A, Cottle, A, Cutter, JE, Dahl, CE, de Viveiros, L, Dobson, JEY, Druszkiewicz, E, Edberg, TK, Eriksen, SR, Fan, A, Fiorucci, S, Flaecher, H, Fraser, ED, Fruth, T, Gaitskell, RJ, Genovesi, J, Ghag, C, Gibson, E, Gilchriese, MGD, Gokhale, S, van der Grinten, MGD, Hall, CR, Harrison, A, Haselschwardt, SJ, Hertel, SA, Hor, JY-K, Horn, M, Huang, DQ, Ignarra, CM, Jahangir, O, Ji, W, Johnson, J, Kaboth, AC, Kamaha, AC, Kamdin, K, Kazkaz, K, Khaitan, D, Khazov, A, Khurana, I, Kocher, CD, Korley, L, Korolkova, EV, Kras, J, Kraus, H, Kravitz, S, Kreczko, L, Krikler, B, Kudryavtsev, VA, Leason, EA, Lee, J, Leonard, DS, Lesko, KT, Levy, C, Li, J, Liao, J, Liao, F-T, Lin, J, Lindote, A, Linehan, R, Lippincott, WH, Liu, R, Liu, X, Loniewski, C, Lopes, MI, Paredes, B Lopez, Lorenzon, W, Luitz, S, Lyle, JM, Majewski, PA, Manalaysay, A, Manenti, L, Mannino, RL, Marangou, N, Marzioni, MF, McKinsey, DN, McLaughlin, J, Meng, Y, Miller, EH, Mizrachi, E, Monte, A, Monzani, ME, Morad, JA, Morrison, E, Mount, BJ, Murphy, A St J, Naim, D, Naylor, A, Nedlik, C, Nehrkorn, C, Nelson, HN, Neves, F, Nikoleyczik, JA, Nilima, A, O'Sullivan, K, Olcina, I, Oliver-Mallory, KC, Pal, S, Palladino, KJ, Palmer, J, Parveen, N, Pease, EK, Penning, B, Pereira, G, Pushkin, K, Reichenbacher, J, Rhyne, CA, Riffard, Q, Rischbieter, GRC, Rosero, R, Rossiter, P, Rutherford, G, Santone, D, Sazzad, ABMR, Schnee, RW, Schubnell, M, Seymour, D, Shaw, S, Shutt, TA, Silk, JJ, Silva, C, Smith, R, Solmaz, M, Solovov, VN, Sorensen, P, Stancu, I, Stevens, A, Stifter, K, Sumner, TJ, Swanson, N, Szydagis, M, Tan, M, Taylor, WC, Taylor, R, Temples, DJ, Terman, PA, Tiedt, DR, Timalsina, M, Tomas, A, Tripathi, M, Tronstad, DR, Turner, W, Tvrznikova, L, Utku, U, Vacheret, A, Vaitkus, A, Wang, JJ, Wang, W, Watson, JR, Webb, RC, White, RG, Whitis, TJ, Wolfs, FLH, Woodward, D, Xiang, X, Xu, J, Yeh, M, Zarzhitsky, P, and Collaboration, LUX-ZEPLINLZ

Published
2020

23. Projected sensitivity of the LUX-ZEPLIN experiment to the 0νββ decay of Xe 136

Author

Akerib, DS, Akerlof, CW, Alqahtani, A, Alsum, SK, Anderson, TJ, Angelides, N, Araújo, HM, Armstrong, JE, Arthurs, M, Bai, X, Balajthy, J, Balashov, S, Bang, J, Baxter, A, Bensinger, J, Bernard, EP, Bernstein, A, Bhatti, A, Biekert, A, Biesiadzinski, TP, Birch, HJ, Boast, KE, Boxer, B, Brás, P, Buckley, JH, Bugaev, VV, Burdin, S, Busenitz, JK, Cabrita, R, Carels, C, Carlsmith, DL, Carmona-Benitez, MC, Cascella, M, Chan, C, Chott, NI, Cole, A, Cottle, A, Cutter, JE, Dahl, CE, De Viveiros, L, Dobson, JEY, Druszkiewicz, E, Edberg, TK, Eriksen, SR, Fan, A, Fiorucci, S, Flaecher, H, Fraser, ED, Fruth, T, Gaitskell, RJ, Genovesi, J, Ghag, C, Gibson, E, Gilchriese, MGD, Gokhale, S, Van Der Grinten, MGD, Hall, CR, Harrison, A, Haselschwardt, SJ, Hertel, SA, Hor, JYK, Horn, M, Huang, DQ, Ignarra, CM, Jahangir, O, Ji, W, Johnson, J, Kaboth, AC, Kamaha, AC, Kamdin, K, Kazkaz, K, Khaitan, D, Khazov, A, Khurana, I, Kocher, CD, Korley, L, Korolkova, EV, Kras, J, Kraus, H, Kravitz, S, Kreczko, L, Krikler, B, Kudryavtsev, VA, Leason, EA, Lee, J, Leonard, DS, Lesko, KT, Levy, C, Li, J, Liao, J, Liao, FT, Lin, J, Lindote, A, Linehan, R, Lippincott, WH, Liu, R, Liu, X, Loniewski, C, Lopes, MI, and López Paredes, B

Subjects
nucl-ex
Abstract

The LUX-ZEPLIN (LZ) experiment will enable a neutrinoless double β decay search in parallel to the main science goal of discovering dark matter particle interactions. We report the expected LZ sensitivity to Xe136 neutrinoless double β decay, taking advantage of the significant (>600 kg) Xe136 mass contained within the active volume of LZ without isotopic enrichment. After 1000 live-days, the median exclusion sensitivity to the half-life of Xe136 is projected to be 1.06×1026 years (90% confidence level), similar to existing constraints. We also report the expected sensitivity of a possible subsequent dedicated exposure using 90% enrichment with Xe136 at 1.06×1027 years.

Published
2020

24. Projected sensitivity of the LUX-ZEPLIN experiment to the 0 ν β β decay of 136 Xe

Author

Akerib, DS, Akerlof, CW, Alqahtani, A, Alsum, SK, Anderson, TJ, Angelides, N, Araújo, HM, Armstrong, JE, Arthurs, M, Bai, X, Balajthy, J, Balashov, S, Bang, J, Baxter, A, Bensinger, J, Bernard, EP, Bernstein, A, Bhatti, A, Biekert, A, Biesiadzinski, TP, Birch, HJ, Boast, KE, Boxer, B, Brás, P, Buckley, JH, Bugaev, VV, Burdin, S, Busenitz, JK, Cabrita, R, Carels, C, Carlsmith, DL, Carmona-Benitez, MC, Cascella, M, Chan, C, Chott, NI, Cole, A, Cottle, A, Cutter, JE, Dahl, CE, De Viveiros, L, Dobson, JEY, Druszkiewicz, E, Edberg, TK, Eriksen, SR, Fan, A, Fiorucci, S, Flaecher, H, Fraser, ED, Fruth, T, Gaitskell, RJ, Genovesi, J, Ghag, C, Gibson, E, Gilchriese, MGD, Gokhale, S, Van der Grinten, MGD, Hall, CR, Harrison, A, Haselschwardt, SJ, Hertel, SA, Hor, JY-K, Horn, M, Huang, DQ, Ignarra, CM, Jahangir, O, Ji, W, Johnson, J, Kaboth, AC, Kamaha, AC, Kamdin, K, Kazkaz, K, Khaitan, D, Khazov, A, Khurana, I, Kocher, CD, Korley, L, Korolkova, EV, Kras, J, Kraus, H, Kravitz, S, Kreczko, L, Krikler, B, Kudryavtsev, VA, Leason, EA, Lee, J, Leonard, DS, Lesko, KT, Levy, C, Li, J, Liao, J, Liao, F-T, Lin, J, Lindote, A, Linehan, R, Lippincott, WH, Liu, R, Liu, X, Loniewski, C, Lopes, MI, López Paredes, B, Lorenzon, W, Luitz, S, Lyle, JM, Majewski, PA, Manalaysay, A, Manenti, L, Mannino, RL, Marangou, N, Marzioni, MF, McKinsey, DN, McLaughlin, J, Meng, Y, Miller, EH, Mizrachi, E, Monte, A, Monzani, ME, Morad, JA, Morrison, E, Mount, BJ, Murphy, ASJ, Naim, D, Naylor, A, Nedlik, C, Nehrkorn, C, Nelson, HN, Neves, F, Nikoleyczik, JA, Nilima, A, O'Sullivan, K, Olcina, I, Oliver-Mallory, KC, Pal, S, Palladino, KJ, Palmer, J, Parveen, N, Pease, EK, Penning, B, Pereira, G, Pushkin, K, Reichenbacher, J, Rhyne, CA, Riffard, Q, Rischbieter, GRC, Rosero, R, Rossiter, P, Rutherford, G, Santone, D, Sazzad, ABMR, Schnee, RW, Schubnell, M, Seymour, D, Shaw, S, Shutt, TA, Silk, JJ, Silva, C, Smith, R, Solmaz, M, Solovov, VN, Sorensen, P, Stancu, I, Stevens, A, Stifter, K, Sumner, TJ, Swanson, N, Szydagis, M, Tan, M, Taylor, WC, Taylor, R, Temples, DJ, Terman, PA, Tiedt, DR, Timalsina, M, Tomás, A, Tripathi, M, Tronstad, DR, Turner, W, Tvrznikova, L, Utku, U, Vacheret, A, Vaitkus, A, Wang, JJ, Wang, W, Watson, JR, Webb, RC, White, RG, Whitis, TJ, Wolfs, FLH, Woodward, D, Xiang, X, Xu, J, Yeh, M, and Zarzhitsky, P

Subjects
nucl-ex
Abstract

The LUX-ZEPLIN (LZ) experiment will enable a neutrinoless double β decay search in parallel to the main science goal of discovering dark matter particle interactions. We report the expected LZ sensitivity to 136 Xe neutrinoless double β decay, taking advantage of the significant ( > 600 kg) 136 Xe mass contained within the active volume of LZ without isotopic enrichment. After 1000 live-days, the median exclusion sensitivity to the half-life of 136 Xe is projected to be 1.06 × 10 26 years (90% confidence level), similar to existing constraints. We also report the expected sensitivity of a possible subsequent dedicated exposure using 90% enrichment with 136 Xe at 1.06 × 10 27 years.

Published
2020

25. LUX-ZEPLIN (LZ) Technical Design Report

Author

Mount, BJ, Hans, S, Rosero, R, Yeh, M, Chan, C, Gaitskell, RJ, Huang, DQ, Makkinje, J, Malling, DC, Pangilinan, M, Rhyne, CA, Taylor, WC, Verbus, JR, Kim, YD, Lee, HS, Lee, J, Leonard, DS, Li, J, Belle, J, Cottle, A, Lippincott, WH, Markley, DJ, Martin, TJ, Sarychev, M, Tope, TE, Utes, M, Wang, R, Young, I, Araújo, HM, Bailey, AJ, Bauer, D, Colling, D, Currie, A, Fayer, S, Froborg, F, Greenwood, S, Jones, WG, Kasey, V, Khaleeq, M, Olcina, I, Paredes, BL, Richards, A, Sumner, TJ, Tomás, A, Vacheret, A, Brás, P, Lindote, A, Lopes, MI, Neves, F, Rodrigues, JP, Silva, C, Solovov, VN, Barry, MJ, Cole, A, Dobi, A, Edwards, WR, Faham, CH, Fiorucci, S, Gantos, NJ, Gehman, VM, Gilchriese, MGD, Hanzel, K, Hoff, MD, Kamdin, K, Lesko, KT, McConnell, CT, O'Sullivan, K, Oliver-Mallory, KC, Patton, SJ, Saba, JS, Sorensen, P, Thomas, KJ, Tull, CE, Waldron, WL, Witherell, MS, Bernstein, A, Kazkaz, K, Xu, J, Akimov, DY, Bolozdynya, AI, Khromov, AV, Konovalov, AM, Kumpan, AV, Sosnovtsev, VV, Dahl, CE, Temples, D, Carmona-Benitez, MC, Viveiros, LD, Akerib, DS, Auyeung, H, Biesiadzinski, TP, Breidenbach, M, Bramante, R, Conley, R, Craddock, WW, Fan, A, Hau, A, Ignarra, CM, Ji, W, Krebs, HJ, Linehan, R, Lee, C, Luitz, S, Mizrachi, E, Monzani, ME, O'Neill, FG, Pierson, S, Racine, M, Ratcliff, BN, Shutt, GW, Shutt, TA, Skarpaas, K, Stifter, K, To, WH, Va'vra, J, Whitis, TJ, Wisniewski, WJ, Bai, X, Bunker, R, Coughlen, R, Hjemfelt, C, Leonard, R, Miller, EH, Morrison, E, Reichenbacher, J, Schnee, RW, Stark, MR, Sundarnath, K, Tiedt, DR, Timalsina, M, Bauer, P, Carlson, B, Horn, M, Johnson, M, Keefner, J, Maupin, C, Taylor, DJ, Balashov, S, Ford, P, Francis, V, Holtom, E, Khazov, A, Kaboth, A, Majewski, P, Nikkel, JA, O'Dell, J, Preece, RM, Grinten, MGDVD, Worm, SD, Mannino, RL, Stiegler, TM, Terman, PA, Webb, RC, Levy, C, Mock, J, Szydagis, M, Busenitz, JK, Elnimr, M, Hor, JY-K, Meng, Y, Piepke, A, Stancu, I, Kreczko, L, Krikler, B, Penning, B, Bernard, EP, Jacobsen, RG, McKinsey, DN, Watson, R, Cutter, JE, El-Jurf, S, Gerhard, RM, Hemer, D, Hillbrand, S, Holbrook, B, Lenardo, BG, Manalaysay, AG, Morad, JA, Stephenson, S, Thomson, JA, Tripathi, M, Uvarov, S, Haselschwardt, SJ, Kyre, S, Nehrkorn, C, Nelson, HN, Solmaz, M, White, DT, Cascella, M, Dobson, JEY, Ghag, C, Liu, X, Manenti, L, Reichhart, L, Shaw, S, Utku, U, Beltrame, P, Davison, TJR, Marzioni, MF, Murphy, ASJ, Nilima, A, Boxer, B, Burdin, S, Greenall, A, Powell, S, Rose, HJ, Sutcliffe, P, Balajthy, J, Edberg, TK, Hall, CR, Silk, JS, Hertel, S, Akerlof, CW, Arthurs, M, Lorenzon, W, Pushkin, K, Schubnell, M, Boast, KE, Carels, C, Fruth, T, Kraus, H, Liao, F-T, Lin, J, Scovell, PR, Druszkiewicz, E, Khaitan, D, Koyuncu, M, Skulski, W, Wolfs, FLH, Yin, J, Korolkova, EV, Kudryavtsev, VA, Rossiter, P, Woodward, D, Chiller, AA, Chiller, C, Mei, D-M, Wang, L, Wei, W-Z, While, M, Zhang, C, Alsum, SK, Benson, T, Carlsmith, DL, Cherwinka, JJ, Dasu, S, Gregerson, G, Gomber, B, Pagac, A, Palladino, KJ, Vuosalo, CO, Xiao, Q, Buckley, JH, Bugaev, VV, Olevitch, MA, Boulton, EM, Emmet, WT, Hurteau, TW, Larsen, NA, Pease, EK, Tennyson, BP, and Tvrznikova, L

Subjects
High Energy Physics - Experiment (hep-ex), Physics - Instrumentation and Detectors, FOS: Physical sciences, Instrumentation and Detectors (physics.ins-det), Astrophysics - Instrumentation and Methods for Astrophysics, Instrumentation and Methods for Astrophysics (astro-ph.IM), High Energy Physics - Experiment
Abstract

In this Technical Design Report (TDR) we describe the LZ detector to be built at the Sanford Underground Research Facility (SURF). The LZ dark matter experiment is designed to achieve sensitivity to a WIMP-nucleon spin-independent cross section of three times ten to the negative forty-eighth square centimeters., 392 pages. Submitted to the Department of Energy as part of the documentation for the Critical Decision Numbers Two and Three (CD-2 and CD-3) management processes. Report also available by chapter at this URL

Published
2017

26. LUX-ZEPLIN (LZ) Conceptual Design Report

Author

Collaboration, TLZ, Akerib, DS, Akerlof, CW, Akimov, DY, Alsum, SK, Araújo, HM, Bai, X, Bailey, AJ, Balajthy, J, Balashov, S, Barry, MJ, Bauer, P, Beltrame, P, Bernard, EP, Bernstein, A, Biesiadzinski, TP, Boast, KE, Bolozdynya, AI, Boulton, EM, Bramante, R, Buckley, JH, Bugaev, VV, Bunker, R, Burdin, S, Busenitz, JK, Carels, C, Carlsmith, DL, Carlson, B, Carmona-Benitez, MC, Cascella, M, Chan, C, Cherwinka, JJ, Chiller, AA, Chiller, C, Craddock, WW, Currie, A, Cutter, JE, Cunha, JPD, Dahl, CE, Dasu, S, Davison, TJR, Viveiros, LD, Dobi, A, Dobson, JEY, Druszkiewicz, E, Edberg, TK, Edwards, BN, Edwards, WR, Elnimr, MM, Emmet, WT, Faham, CH, Fiorucci, S, Ford, P, Francis, VB, Fu, C, Gaitskell, RJ, Gantos, NJ, Gehman, VM, Gerhard, RM, Ghag, C, Gilchriese, MGD, Gomber, B, Hall, CR, Harris, A, Haselschwardt, SJ, Hertel, SA, Hoff, MD, Holbrook, B, Holtom, E, Huang, DQ, Hurteau, TW, Ignarra, CM, Jacobsen, RG, Ji, W, Ji, X, Johnson, M, Ju, Y, Kamdin, K, Kazkaz, K, Khaitan, D, Khazov, A, Khromov, AV, Konovalov, AM, Korolkova, EV, Kraus, H, Krebs, HJ, Kudryavtsev, VA, Kumpan, AV, Kyre, S, Larsen, NA, Lee, C, Lenardo, BG, Lesko, KT, Liao, F-T, Lin, J, Lindote, A, Lippincott, WH, Liu, J, Liu, X, Lopes, MI, Lorenzon, W, Luitz, S, Majewski, P, Malling, DC, Manalaysay, AG, Manenti, L, Mannino, RL, Markley, DJ, Martin, TJ, Marzioni, MF, McKinsey, DN, Mei, D-M, Meng, Y, Miller, EH, Mock, J, Monzani, ME, Morad, JA, Murphy, ASJ, Nelson, HN, Neves, F, Nikkel, JA, O'Neill, FG, O'Dell, J, O'Sullivan, K, Olevitch, MA, Oliver-Mallory, KC, Palladino, KJ, Pangilinan, M, Patton, SJ, Pease, EK, Piepke, A, Powell, S, Preece, RM, Pushkin, K, Ratcliff, BN, Reichenbacher, J, Reichhart, L, Rhyne, C, Rodrigues, JP, Rose, HJ, Rosero, R, Saba, JS, Sarychev, M, Schnee, RW, Schubnell, MSG, Scovell, PR, Shaw, S, Shutt, TA, Silva, C, Skarpaas, K, Skulski, W, Solovov, VN, Sorensen, P, Sosnovtsev, VV, Stancu, I, Stark, MR, Stephenson, S, Stiegler, TM, Sumner, TJ, Sundarnath, K, Szydagis, M, Taylor, DJ, Taylor, W, Tennyson, BP, Terman, PA, Thomas, KJ, Thomson, JA, Tiedt, DR, To, WH, Tomás, A, Tripathi, M, Tull, CE, Tvrznikova, L, Uvarov, S, Va'vra, J, Grinten, MGDVD, Verbus, JR, Vuosalo, CO, Waldron, WL, Wang, L, Webb, RC, Wei, W-Z, While, M, White, DT, Whitis, TJ, Wisniewski, WJ, Witherell, MS, Wolfs, FLH, Woods, E, Woodward, D, Worm, SD, Yeh, M, Yin, J, Young, SK, and Zhang, C

Abstract

The design and performance of the LUX-ZEPLIN (LZ) detector is described as of March 2015 in this Conceptual Design Report. LZ is a second-generation dark-matter detector with the potential for unprecedented sensitivity to weakly interacting massive particles (WIMPs) of masses from a few GeV/c2 to hundreds of TeV/c2. With total liquid xenon mass of about 10 tonnes, LZ will be the most sensitive experiment for WIMPs in this mass region by the end of the decade. This report describes in detail the design of the LZ technical systems. Expected backgrounds are quantified and the performance of the experiment is presented. The LZ detector will be located at the Sanford Underground Research Facility in South Dakota. The organization of the LZ Project and a summary of the expected cost and current schedule are given.

Published
2015

27. LUX-ZEPLIN (LZ) Conceptual Design Report

Author

Collaboration, TLZ, Akerib, DS, Akerlof, CW, Akimov, DY, Alsum, SK, Araújo, HM, Bai, X, Bailey, AJ, Balajthy, J, Balashov, S, Barry, MJ, Wei, W-Z, While, M, White, DT, Whitis, TJ, Wisniewski, WJ, Witherell, MS, Wolfs, FLH, Woods, E, Woodward, D, Bramante, R, Lorenzon, W, Worm, SD, Yeh, M, Yin, J, Young, SK, Zhang, C, Buckley, JH, Bugaev, Bunker, R, Burdin, S, Busenitz, JK, Luitz, S, Carels, C, Carlsmith, DL, Carlson, B, Carmona-Benitez, MC, Cascella, M, Chan, C, Cherwinka, JJ, Chiller, AA, Chiller, C, Craddock, WW, Majewski, P, Currie, A, Cutter, JE, Cunha, JPD, Dahl, CE, Dasu, S, Davison, TJR, Viveiros, LD, Dobi, A, Dobson, JEY, Druszkiewicz, E, Malling, DC, Edberg, TK, Edwards, BN, Edwards, WR, Elnimr, MM, Emmet, WT, Faham, CH, Fiorucci, S, Ford, P, Francis, VB, Fu, C, Manalaysay, AG, Gaitskell, RJ, Gantos, NJ, Gehman, VM, Gerhard, RM, Ghag, C, Gilchriese, MGD, Gomber, B, Hall, CR, Harris, A, Haselschwardt, SJ, Manenti, L, Hertel, SA, Hoff, MD, Holbrook, B, Holtom, E, Huang, DQ, Hurteau, TW, Ignarra, CM, Jacobsen, RG, Ji, W, Ji, X, Mannino, RL, Johnson, M, Ju, Y, Kamdin, K, Kazkaz, K, Khaitan, D, Khazov, A, Khromov, AV, Konovalov, AM, Korolkova, EV, Kraus, H, Markley, DJ, Krebs, HJ, Kudryavtsev, VA, Kumpan, AV, Kyre, S, Larsen, NA, Lee, C, Lenardo, BG, Lesko, KT, Liao, F-T, Lin, J, Martin, TJ, Lindote, A, Lippincott, WH, Liu, J, Liu, X, Lopes, MI, Marzioni, MF, Bauer, P, McKinsey, DN, Mei, D-M, Meng, Y, Miller, EH, Mock, J, Monzani, ME, Morad, JA, Murphy, ASJ, Nelson, HN, Neves, F, Beltrame, P, Nikkel, JA, O'Neill, FG, O'Dell, J, O'Sullivan, K, Olevitch, MA, Oliver-Mallory, KC, Palladino, KJ, Pangilinan, M, Patton, SJ, Pease, EK, Bernard, EP, Piepke, A, Powell, S, Preece, RM, Pushkin, K, Ratcliff, BN, Reichenbacher, J, Reichhart, L, Rhyne, C, Rodrigues, JP, Rose, HJ, Bernstein, A, Rosero, R, Saba, JS, Sarychev, M, Schnee, RW, Schubnell, MSG, Scovell, PR, Shaw, S, Shutt, TA, Silva, C, Skarpaas, K, Biesiadzinski, TP, Skulski, W, Solovov, VN, Sorensen, P, Sosnovtsev, Stancu, I, Stark, MR, Stephenson, S, Stiegler, TM, Sumner, TJ, Sundarnath, K, Boast, KE, Szydagis, M, Taylor, DJ, Taylor, W, Tennyson, BP, Terman, PA, Thomas, KJ, Thomson, JA, Tiedt, DR, To, WH, Tomás, A, Bolozdynya, AI, Tripathi, M, Tull, CE, Tvrznikova, L, Uvarov, S, Va'vra, J, Grinten, MGDVD, Verbus, Vuosalo, CO, Waldron, WL, Wang, L, Boulton, EM, and Webb, RC

Subjects
hep-ex, 7. Clean energy, physics.ins-det, astro-ph.IM
Abstract

The design and performance of the LUX-ZEPLIN (LZ) detector is described as of March 2015 in this Conceptual Design Report. LZ is a second-generation dark-matter detector with the potential for unprecedented sensitivity to weakly interacting massive particles (WIMPs) of masses from a few GeV/c2 to hundreds of TeV/c2. With total liquid xenon mass of about 10 tonnes, LZ will be the most sensitive experiment for WIMPs in this mass region by the end of the decade. This report describes in detail the design of the LZ technical systems. Expected backgrounds are quantified and the performance of the experiment is presented. The LZ detector will be located at the Sanford Underground Research Facility in South Dakota. The organization of the LZ Project and a summary of the expected cost and current schedule are given.

28. Enhancing the sensitivity of the LUX-ZEPLIN (LZ) dark matter experiment to low energy signals

Author

Akerib, Ds, Musalhi, Ak Al, Alsum, Sk, Amarasinghe, Cs, Ames, A., Anderson, Tj, Angelides, N., Araújo, Hm, Armstrong, Je, Arthurs, M., Bai, X., Balajthy, J., Balashov, S., Bang, J., Bargemann, Jw, Bauer, D., Baxter, A., Beltrame, P., Bernard, Ep, Bernstein, A., Bhatti, A., Biekert, A., Biesiadzinski, Tp, Birch, Hj, Blockinger, Gm, Boxer, B., Brew, Caj, Brás, P., Burdin, S., Busenitz, Jk, Buuck, M., Cabrita, R., Carmona-Benitez, Mc, Cascella, M., Chan, C., Chott, Ni, Cole, A., Converse, Mv, Cottle, A., Cox, G., Cutter, Je, Dahl, Ce, Viveiros, L., Dobson, Jey, Druszkiewicz, E., Eriksen, Sr, Fan, A., Fayer, S., Fearon, Nm, Fiorucci, S., Flaecher, H., Fraser, Ed, Fruth, T., Gaitskell, Rj, Genovesi, J., Ghag, C., Gibson, E., Gokhale, S., Grinten, Mgd, Gwilliam, Cb, Hall, Cr, Haselschwardt, Sj, Hertel, Sa, Horn, M., Huang, Dq, Ignarra, Cm, Jahangir, O., James, Rs, Ji, W., Johnson, J., Kaboth, Ac, Kamaha, Ac, Kamdin, K., Kazkaz, K., Khaitan, D., Khazov, A., Khurana, I., Kodroff, D., Korley, L., Korolkova, Ev, Kraus, H., Kravitz, S., Kreczko, L., Krikler, B., Kudryavtsev, Va, Leason, Ea, Lesko, Kt, Levy, C., Li, J., Liao, J., Lin, J., Lindote, A., Linehan, R., Lippincott, Wh, Liu, X., Lopes, Mi, Asamar, E. Lopez, Paredes, B. López, Lorenzon, W., Luitz, S., Majewski, Pa, Manalaysay, A., Manenti, L., Rachel Mannino, Marangou, N., Mccarthy, Me, Mckinsey, Dn, Mclaughlin, J., Miller, Eh, Mizrachi, E., Monte, A., Monzani, Me, Morad, Ja, Mendoza, Jd Morales, Morrison, E., Mount, Bj, Murphy, A. St J., Naim, D., Naylor, A., Nedlik, C., Nelson, Hn, Neves, F., Nikoleyczik, Ja, Olcina, I., Oliver-Mallory, Kc, Pal, S., Palladino, Kj, Palmer, J., Parveen, N., Pease, Ek, Penning, B., Pereira, G., Piepke, A., Qie, Y., Reichenbacher, J., Rhyne, Ca, Richards, A., Riffard, Q., Rischbieter, Grc, Rosero, R., Rossiter, P., Santone, D., Sazzad, Abmr, Schnee, Rw, Scovell, Pr, Shaw, S., Shutt, Ta, Silk, Jj, Silva, C., Smith, R., Solmaz, M., Solovov, Vn, Sorensen, P., Stancu, I., Stevens, A., Stifter, K., Suerfu, B., Sumner, Tj, Swanson, N., Szydagis, M., Taylor, Wc, Taylor, R., Temples, Dj, Terman, Pa, Tiedt, Dr, Timalsina, M., To, Wh, Tripathi, M., Tronstad, Dr, Turner, W., Utku, U., Vaitkus, A., Wang, B., Wang, Jj, Wang, W., Watson, Jr, Webb, Rc, White, Rg, Whitis, Tj, Williams, M., Wolfs, Flh, Woodward, D., Wright, Cj, Xiang, X., Xu, J., Yeh, M., and Zarzhitsky, P.

Subjects
Physics - Instrumentation and Detectors, Physics::Instrumentation and Detectors, FOS: Physical sciences, Instrumentation and Detectors (physics.ins-det), Astrophysics - Instrumentation and Methods for Astrophysics, Instrumentation and Methods for Astrophysics (astro-ph.IM)
Abstract

Two-phase xenon detectors, such as that at the core of the forthcoming LZ dark matter experiment, use photomultiplier tubes to sense the primary (S1) and secondary (S2) scintillation signals resulting from particle interactions in their liquid xenon target. This paper describes a simulation study exploring two techniques to lower the energy threshold of LZ to gain sensitivity to low-mass dark matter and astrophysical neutrinos, which will be applicable to other liquid xenon detectors. The energy threshold is determined by the number of detected S1 photons; typically, these must be recorded in three or more photomultiplier channels to avoid dark count coincidences that mimic real signals. To lower this threshold: a) we take advantage of the double photoelectron emission effect, whereby a single vacuum ultraviolet photon has a $\sim20\%$ probability of ejecting two photoelectrons from a photomultiplier tube photocathode; and b) we drop the requirement of an S1 signal altogether, and use only the ionization signal, which can be detected more efficiently. For both techniques we develop signal and background models for the nominal exposure, and explore accompanying systematic effects, including the dependence on the free electron lifetime in the liquid xenon. When incorporating double photoelectron signals, we predict a factor of $\sim 4$ sensitivity improvement to the dark matter-nucleon scattering cross-section at $2.5$ GeV/c$^2$, and a factor of $\sim1.6$ increase in the solar $^8$B neutrino detection rate. Dropping the S1 requirement may allow sensitivity gains of two orders of magnitude in both cases. Finally, we apply these techniques to even lower masses by taking into account the atomic Migdal effect; this could lower the dark matter particle mass threshold to $80$ MeV/c$^2$., 14 pages, 6 figures

29. Projected sensitivity of the LUX-ZEPLIN experiment to the 0νββ decay of 136Xe

Author

Akerib, DS, Akerlof, CW, Alqahtani, A, Alsum, SK, Anderson, TJ, Angelides, N, Araújo, HM, Armstrong, JE, Arthurs, M, Bai, X, Balajthy, J, Balashov, S, Bang, J, Baxter, A, Bensinger, J, Bernard, EP, Bernstein, A, Bhatti, A, Biekert, A, Biesiadzinski, TP, Birch, HJ, Boast, KE, Boxer, B, Brás, P, Buckley, JH, Bugaev, VV, Burdin, S, Busenitz, JK, Cabrita, R, Carels, C, Carlsmith, DL, Benitez, MCC, Cascella, M, Chan, C, Chott, NI, Cole, A, Cottle, A, Cutter, JE, Dahl, CE, Viveiros, LD, Dobson, JEY, Druszkiewicz, E, Edberg, TK, Eriksen, SR, Fan, A, Fiorucci, S, Flaecher, H, Fraser, ED, Fruth, T, Gaitskell, RJ, Genovesi, J, Ghag, C, Gibson, E, Gilchriese, MGD, Gokhale, S, Grinten, MGDVD, Hall, CR, Harrison, A, Haselschwardt, SJ, Hertel, SA, Hor, JYK, Horn, M, Huang, DQ, Ignarra, CM, Jahangir, O, Ji, W, Johnson, J, Kaboth, AC, Kamaha, AC, Kamdin, K, Kazkaz, K, Khaitan, D, Khazov, A, Khurana, I, Kocher, CD, Korley, L, Korolkova, EV, Kras, J, Kraus, H, Kravitz, S, Kreczko, L, Krikler, B, Kudryavtsev, VA, Leason, EA, Lee, J, Leonard, DS, Lesko, KT, Levy, C, Li, J, Liao, J, Liao, FT, Lin, J, Lindote, A, Linehan, R, Lippincott, WH, Liu, R, Liu, X, Loniewski, C, Lopes, MI, Paredes, BL, Lorenzon, W, Luitz, S, Lyle, JM, Majewski, PA, Manalaysay, A, Manenti, L, Mannino, RL, Marangou, N, Marzioni, MF, McKinsey, DN, McLaughlin, J, Meng, Y, Miller, EH, Mizrachi, E, Monte, A, Monzani, ME, Morad, JA, Morrison, E, Mount, BJ, Murphy, ASJ, Naim, D, Naylor, A, Nedlik, C, Nehrkorn, C, Nelson, HN, Neves, F, Nikoleyczik, JA, Nilima, A, O'Sullivan, K, Olcina, I, Oliver-Mallory, KC, Pal, S, Palladino, KJ, Palmer, J, Parveen, N, Pease, EK, Penning, B, Pereira, G, Pushkin, K, Reichenbacher, J, Rhyne, CA, Riffard, Q, Rischbieter, GRC, Rosero, R, Rossiter, P, Rutherford, G, Santone, D, Sazzad, ABMR, Schnee, RW, Schubnell, M, Seymour, D, Shaw, S, Shutt, TA, Silk, JJ, Silva, C, Smith, R, Solmaz, M, Solovov, VN, Sorensen, P, Stancu, I, Stevens, A, Stifter, K, Sumner, TJ, Swanson, N, Szydagis, M, Tan, M, Taylor, WC, Taylor, R, Temples, DJ, Terman, PA, Tiedt, DR, Timalsina, M, Tomás, A, Tripathi, M, Tronstad, DR, Turner, W, Tvrznikova, L, Utku, U, Vacheret, A, Vaitkus, A, Wang, JJ, Wang, W, Watson, JR, Webb, RC, White, RG, Whitis, TJ, Wolfs, FLH, Woodward, D, Xiang, X, Xu, J, Yeh, M, and Zarzhitsky, P

Abstract

The LUX-ZEPLIN (LZ) experiment will enable a neutrinoless double beta decay search in parallel to the main science goal of discovering dark matter particle interactions. We report the expected LZ sensitivity to ^136Xe neutrinoless double beta decay, taking advantage of the significant (>600 kg) ^136Xe mass contained within the active volume of LZ without isotopic enrichment. After 1000 live-days, the median exclusion sensitivity to the half-life of ^136Xe is projected to be 1.06×10^26 years (90% confidence level), similar to existing constraints. We also report the expected sensitivity of a possible subsequent dedicated exposure using 90% enrichment with ^136Xe at 1.06×10^27 years.

30. Evidence for iota (1460) production in pi -p interactions at 21.4 GeV/c.

Author

Rath MG, Cason NM, Bensinger JR, Bishop JM, Biswas NN, Busenitz JK, Etkin A, Foley KJ, Fortner MR, Fortney LR, Goo J, Goshaw AT, Kenney VP, Kirsch LE, Kramer MA, Lindenbaum SJ, Longacre RS, Love WA, McCrory E, Morris TW, Piekarz H, Piekarz J, Platner ED, Poster RA, Robertson WJ, Ruchti RC, Saulys AC, Shephard WD, and Zogrofou P

Published
1988
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31. The KS0KS0 pi 0 system produced in pi -p interactions at 21.4 GeV/c.

Author

Rath MG, Cason NM, Bensinger JR, Bishop JM, Biswas NN, Busenitz JK, Etkin A, Foley KJ, Fortner MR, Fortney LR, Goo J, Kenney VP, Kirsch LE, Kramer MA, Lindenbaum SJ, Longacre RS, Love WA, McCrory E, Morris TW, Piekarz H, Piekarz J, Platner ED, Poster RA, Ruchti RC, Saulys AC, Shephard WD, and Zogrofou P

Published
1989
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