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8 results on '"Converse MV"'

1. The design, implementation, and performance of the LZ calibration systems

Author

Aalbers, J, Akerib, DS, Al Musalhi, AK, Alder, F, Amarasinghe, CS, Ames, A, Anderson, TJ, Angelides, N, Araújo, HM, Armstrong, JE, Arthurs, M, Baker, A, Balashov, S, Bang, J, Barillier, EE, Bargemann, JW, Beattie, K, Benson, T, Bhatti, A, Biekert, A, Biesiadzinski, TP, Birch, HJ, Bishop, E, Blockinger, GM, Boxer, B, Brew, CAJ, Brás, P, Burdin, S, Buuck, M, Carmona-Benitez, MC, Carter, M, Chawla, A, Chen, H, Cherwinka, JJ, Chin, YT, Chott, NI, Converse, MV, Cottle, A, Cox, G, Curran, D, Dahl, CE, David, A, Delgaudio, J, Dey, S, de Viveiros, L, Di Felice, L, Ding, C, Dobson, JEY, Druszkiewicz, E, Eriksen, SR, Fan, A, Fearon, NM, Fieldhouse, N, Fiorucci, S, Flaecher, H, Fraser, ED, Fruth, TMA, Gaitskell, RJ, Geffre, A, Genovesi, J, Ghag, C, Gibbons, R, Gokhale, S, Green, J, van der Grinten, MGD, Haiston, JJ, Hall, CR, Han, S, Hartigan-O'Connor, E, Haselschwardt, SJ, Hernandez, MA, Hertel, SA, Heuermann, G, Homenides, GJ, Horn, M, Huang, DQ, Hunt, D, Jacquet, E, James, RS, Johnson, J, Kaboth, AC, Kamaha, AC, Kannichankandy, M, Khaitan, D, Khazov, A, Khurana, I, Kim, J, Kim, YD, Kingston, J, Kirk, R, Kodroff, D, Korley, L, Korolkova, EV, Kraus, H, Kravitz, S, Kreczko, L, Kudryavtsev, VA, Leonard, DS, Lesko, KT, and Levy, C

Subjects
Nuclear and Plasma Physics, Particle and High Energy Physics, Physical Sciences, Engineering, Nuclear & Particles Physics, Physical sciences
Abstract

LUX-ZEPLIN (LZ) is a tonne-scale experiment searching for direct dark matter interactions and other rare events. It is located at the Sanford Underground Research Facility (SURF) in Lead, South Dakota, USA. The core of the LZ detector is a dual-phase xenon time projection chamber (TPC), designed with the primary goal of detecting Weakly Interacting Massive Particles (WIMPs) via their induced low energy nuclear recoils. Surrounding the TPC, two veto detectors immersed in an ultra-pure water tank enable reducing background events to enhance the discovery potential. Intricate calibration systems are purposely designed to precisely understand the responses of these three detector volumes to various types of particle interactions and to demonstrate LZ’s ability to discriminate between signals and backgrounds. In this paper, we present a comprehensive discussion of the key features, requirements, and performance of the LZ calibration systems, which play a crucial role in enabling LZ’s WIMP-search and its broad science program. The thorough description of these calibration systems, with an emphasis on their novel aspects, is valuable for future calibration efforts in direct dark matter and other rare-event search experiments.

Published
2024

2. New constraints on ultraheavy dark matter from the LZ experiment

Author

Aalbers, J, Akerib, DS, Al Musalhi, AK, Alder, F, Amarasinghe, CS, Ames, A, Anderson, TJ, Angelides, N, Araújo, HM, Armstrong, JE, Arthurs, M, Baker, A, Balashov, S, Bang, J, Barillier, EE, Bargemann, JW, Baxter, A, Beattie, K, Benson, T, Bhatti, A, Biekert, A, Biesiadzinski, TP, Birch, HJ, Bishop, EJ, Blockinger, GM, Boxer, B, Brew, CAJ, Brás, P, Burdin, S, Buuck, M, Carmona-Benitez, MC, Carter, M, Chawla, A, Chen, H, Cherwinka, JJ, Chin, YT, Chott, NI, Converse, MV, Cottle, A, Cox, G, Curran, D, Dahl, CE, David, A, Delgaudio, J, Dey, S, de Viveiros, L, Di Felice, L, Ding, C, Dobson, JEY, Druszkiewicz, E, Eriksen, SR, Fan, A, Fearon, NM, Fiorucci, S, Flaecher, H, Fraser, ED, Fruth, TMA, Gaitskell, RJ, Geffre, A, Genovesi, J, Ghag, C, Gibbons, R, Gokhale, S, Green, J, van der Grinten, MGD, Haiston, JH, Hall, CR, Han, S, Hartigan-O’Connor, E, Haselschwardt, SJ, Hernandez, MA, Hertel, SA, Heuermann, G, Homenides, GJ, Horn, M, Huang, DQ, Hunt, D, Ignarra, CM, Jacquet, E, James, RS, Johnson, J, Kaboth, AC, Kamaha, AC, Kannichankandy, M, Khaitan, D, Khazov, A, Khurana, I, Kim, J, Kingston, J, Kirk, R, Kodroff, D, Korley, L, Korolkova, EV, Kraus, H, Kravitz, S, Kreczko, L, Krikler, B, Kudryavtsev, VA, Lee, J, and Leonard, DS

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

Searches for dark matter with liquid xenon time projection chamber experiments have traditionally focused on the region of the parameter space that is characteristic of weakly interacting massive particles, ranging from a few GeV/c2 to a few TeV/c2. Models of dark matter with a mass much heavier than this are well motivated by early production mechanisms different from the standard thermal freeze-out, but they have generally been less explored experimentally. In this work, we present a reanalysis of the first science run of the LZ experiment, with an exposure of 0.9 tonne×yr, to search for ultraheavy particle dark matter. The signal topology consists of multiple energy deposits in the active region of the detector forming a straight line, from which the velocity of the incoming particle can be reconstructed on an event-by-event basis. Zero events with this topology were observed after applying the data selection calibrated on a simulated sample of signal-like events. New experimental constraints are derived, which rule out previously unexplored regions of the dark matter parameter space of spin-independent interactions beyond a mass of 1017 GeV/c2.

Published
2024

3. First constraints on WIMP-nucleon effective field theory couplings in an extended energy region from LUX-ZEPLIN

Author

Aalbers, J, Akerib, DS, Al Musalhi, AK, Alder, F, Amarasinghe, CS, Ames, A, Anderson, TJ, Angelides, N, Araújo, HM, Armstrong, JE, Arthurs, M, Baker, A, Balashov, S, Bang, J, Bargemann, JW, Baxter, A, Beattie, K, Benson, T, Bhatti, A, Biekert, A, Biesiadzinski, TP, Birch, HJ, Bishop, E, Blockinger, GM, Boxer, B, Brew, CAJ, Brás, P, Burdin, S, Buuck, M, Carmona-Benitez, MC, Carter, M, Chawla, A, Chen, H, Cherwinka, JJ, Chott, NI, Converse, MV, Cottle, A, Cox, G, Curran, D, Dahl, CE, David, A, Delgaudio, J, Dey, S, de Viveiros, L, Ding, C, Dobson, JEY, Druszkiewicz, E, Eriksen, SR, Fan, A, Fearon, NM, Fiorucci, S, Flaecher, H, Fraser, ED, Fruth, TMA, Gaitskell, RJ, Geffre, A, Genovesi, J, Ghag, C, Gibbons, R, Gokhale, S, Green, J, van der Grinten, MGD, Hall, CR, Han, S, Hartigan-O’Connor, E, Haselschwardt, SJ, Hernandez, MA, Hertel, SA, Heuermann, G, Homenides, GJ, Horn, M, Huang, DQ, Hunt, D, Ignarra, CM, Jacquet, E, James, RS, Johnson, J, Kaboth, AC, Kamaha, AC, Khaitan, D, Khazov, A, Khurana, I, Kim, J, Kingston, J, Kirk, R, Kodroff, D, Korley, L, Korolkova, EV, Kraus, H, Kravitz, S, Kreczko, L, Krikler, B, Kudryavtsev, VA, Lee, J, Leonard, DS, Lesko, KT, Levy, C, Lin, J, Lindote, A, and Linehan, R

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

Following the first science results of the LUX-ZEPLIN (LZ) experiment, a dual-phase xenon time projection chamber operating from the Sanford Underground Research Facility in Lead, South Dakota, USA, we report the initial limits on a model-independent nonrelativistic effective field theory describing the complete set of possible interactions of a weakly interacting massive particle (WIMP) with a nucleon. These results utilize the same 5.5 t fiducial mass and 60 live days of exposure collected for the LZ spin-independent and spin-dependent analyses while extending the upper limit of the energy region of interest by a factor of 7.5 to 270 keV. No significant excess in this high energy region is observed. Using a profile-likelihood ratio analysis, we report 90% confidence level exclusion limits on the coupling of each individual nonrelativistic WIMP-nucleon operator for both elastic and inelastic interactions in the isoscalar and isovector bases.

Published
2024

4. Search for new physics in low-energy electron recoils from the first LZ exposure

Author

Aalbers, J, Akerib, DS, Al Musalhi, AK, Alder, F, Amarasinghe, CS, Ames, A, Anderson, TJ, Angelides, N, Araújo, HM, Armstrong, JE, Arthurs, M, Baker, A, Balashov, S, Bang, J, Bargemann, JW, Baxter, A, Beattie, K, Beltrame, P, Benson, T, Bhatti, A, Biekert, A, Biesiadzinski, TP, Birch, HJ, Blockinger, GM, Boxer, B, Brew, CAJ, Brás, P, Burdin, S, Buuck, M, Carmona-Benitez, MC, Chan, C, Chawla, A, Chen, H, Cherwinka, JJ, Chott, NI, Converse, MV, Cottle, A, Cox, G, Curran, D, Dahl, CE, David, A, Delgaudio, J, Dey, S, de Viveiros, L, Ding, C, Dobson, JEY, Druszkiewicz, E, Eriksen, SR, Fan, A, Fearon, NM, Fiorucci, S, Flaecher, H, Fraser, ED, Fruth, TMA, Gaitskell, RJ, Geffre, A, Genovesi, J, Ghag, C, Gibbons, R, Gokhale, S, Green, J, van der Grinten, MGD, Hall, CR, Han, S, Hartigan-O’Connor, E, Haselschwardt, SJ, Huang, DQ, Hertel, SA, Heuermann, G, Horn, M, Hunt, D, Ignarra, CM, Jahangir, O, James, RS, Johnson, J, Kaboth, AC, Kamaha, AC, Khaitan, D, Khazov, A, Khurana, I, Kim, J, Kingston, J, Kirk, R, 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, Lin, J, Lindote, A, Linehan, R, and Lippincott, WH

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

The LUX-ZEPLIN (LZ) experiment is a dark matter detector centered on a dual-phase xenon time projection chamber. We report searches for new physics appearing through few-keV-scale electron recoils, using the experiment's first exposure of 60 live days and a fiducial mass of 5.5 t. The data are found to be consistent with a background-only hypothesis, and limits are set on models for new physics including solar axion electron coupling, solar neutrino magnetic moment and millicharge, and electron couplings to galactic axionlike particles and hidden photons. Similar limits are set on weakly interacting massive particle (WIMP) dark matter producing signals through ionized atomic states from the Migdal effect.

Published
2023

5. 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

6. Background determination for the LUX-ZEPLIN dark matter 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, Baker, A, Bang, J, Bargemann, JW, Baxter, A, Beattie, K, Beltrame, P, Bernard, EP, Bhatti, A, Biekert, A, Biesiadzinski, TP, Birch, HJ, Blockinger, GM, Boxer, B, Brew, CAJ, Brás, P, Burdin, S, Buuck, M, Cabrita, R, Carmona-Benitez, MC, Chan, C, Chawla, A, Chen, H, Chiang, APS, Chott, NI, Converse, MV, Cottle, A, Cox, G, Creaner, O, Dahl, CE, David, A, Dey, S, de Viveiros, L, Ding, C, Dobson, JEY, Druszkiewicz, E, Eriksen, SR, Fan, A, Fearon, NM, Fiorucci, S, Flaecher, H, Fraser, ED, Fruth, T, Gaitskell, RJ, Genovesi, J, Ghag, C, Gibbons, R, Gilchriese, MGD, Gokhale, S, Green, J, van der Grinten, MGD, Gwilliam, CB, Hall, CR, Han, S, Hartigan-O’Connor, E, Haselschwardt, SJ, Hertel, SA, Heuermann, G, Horn, M, Huang, DQ, Hunt, D, Ignarra, CM, Jacobsen, RG, Jahangir, O, James, RS, Johnson, J, Kaboth, AC, Kamaha, AC, Khaitan, D, Khurana, I, Kirk, R, 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, Lin, J, Lindote, A, Linehan, R, Lippincott, WH, and Liu, X

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

The LUX-ZEPLIN experiment recently reported limits on WIMP-nucleus interactions from its initial science run, down to 9.2×10-48 cm2 for the spin-independent interaction of a 36 GeV/c2 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±0.5)×10-5 events/keVee/kg/day in the low-energy region, approximately 60 times lower than the equivalent rate reported by the LUX experiment.

Published
2023

7. 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

8. 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

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