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Your search keyword '"Haselschwardt, SJ"' showing total 5 results
Start Over Author "Haselschwardt, SJ" Journal physical review c
5 results on '"Haselschwardt, SJ"'

1. 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

2. Improved calculations of β decay backgrounds to new physics in liquid xenon detectors

Author

Haselschwardt, SJ, Kostensalo, J, Mougeot, X, and Suhonen, J

Subjects
Atomic, Molecular, Nuclear, Particle and Plasma Physics, Nuclear & Particles Physics
Abstract

We present high-precision theoretical predictions for the electron energy spectra for the ground-state to ground-state β decays of Pb214, Pb212, and Kr85 most relevant to the background of liquid xenon dark matter detectors. The effects of nuclear structure on the spectral shapes are taken into account using large-scale shell-model calculations. Final spectra also include atomic screening and exchange effects. The impact of nuclear structure effects on the Pb214 and Pb212 spectra below ≈100 keV, pertinent for several searches for new physics, are found to be comparatively larger than those from the atomic effects alone. We find that the full calculation for Pb214 (Pb212) predicts 15.0%-23.2% (12.1%-19.0%) less event rate in a 1-15 keV energy region of interest compared to the spectrum calculated as an allowed transition when using values of the weak axial vector coupling in the range gA=0.7-1.0. The discrepancy highlights the importance of both a proper theoretical treatment and the need for direct measurements of these spectra for a thorough understanding of β decay backgrounds in future experiments.

Published
2020

4. 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

5. 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

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