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Neutrinoless Double Beta Decay Sensitivity of the XLZD Rare Event Observatory
Authors:
XLZD Collaboration,
J. Aalbers,
K. Abe,
M. Adrover,
S. Ahmed Maouloud,
D. S. Akerib,
A. K. Al Musalhi,
F. Alder,
L. Althueser,
D. W. P. Amaral,
C. S. Amarasinghe,
A. Ames,
B. Andrieu,
N. Angelides,
E. Angelino,
B. Antunovic,
E. Aprile,
H. M. Araújo,
J. E. Armstrong,
M. Arthurs,
M. Babicz,
D. Bajpai,
A. Baker,
M. Balzer,
J. Bang
, et al. (419 additional authors not shown)
Abstract:
The XLZD collaboration is developing a two-phase xenon time projection chamber with an active mass of 60 to 80 t capable of probing the remaining WIMP-nucleon interaction parameter space down to the so-called neutrino fog. In this work we show that, based on the performance of currently operating detectors using the same technology and a realistic reduction of radioactivity in detector materials,…
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The XLZD collaboration is developing a two-phase xenon time projection chamber with an active mass of 60 to 80 t capable of probing the remaining WIMP-nucleon interaction parameter space down to the so-called neutrino fog. In this work we show that, based on the performance of currently operating detectors using the same technology and a realistic reduction of radioactivity in detector materials, such an experiment will also be able to competitively search for neutrinoless double beta decay in $^{136}$Xe using a natural-abundance xenon target. XLZD can reach a 3$σ$ discovery potential half-life of 5.7$\times$10$^{27}$ yr (and a 90% CL exclusion of 1.3$\times$10$^{28}$ yr) with 10 years of data taking, corresponding to a Majorana mass range of 7.3-31.3 meV (4.8-20.5 meV). XLZD will thus exclude the inverted neutrino mass ordering parameter space and will start to probe the normal ordering region for most of the nuclear matrix elements commonly considered by the community.
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Submitted 30 April, 2025; v1 submitted 23 October, 2024;
originally announced October 2024.
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Two-neutrino double electron capture of $^{124}$Xe in the first LUX-ZEPLIN exposure
Authors:
J. Aalbers,
D. S. Akerib,
A. K. Al Musalhi,
F. Alder,
C. S. Amarasinghe,
A. Ames,
T. J. Anderson,
N. Angelides,
H. M. Araújo,
J. E. Armstrong,
M. Arthurs,
A. Baker,
S. Balashov,
J. Bang,
J. W. Bargemann,
E. E. Barillier,
K. Beattie,
A. Bhatti,
A. Biekert,
T. P. Biesiadzinski,
H. J. Birch,
E. Bishop,
G. M. Blockinger,
B. Boxer,
C. A. J. Brew
, et al. (180 additional authors not shown)
Abstract:
The broad physics reach of the LUX-ZEPLIN (LZ) experiment covers rare phenomena beyond the direct detection of dark matter. We report precise measurements of the extremely rare decay of $^{124}$Xe through the process of two-neutrino double electron capture (2$ν$2EC), utilizing a $1.39\,\mathrm{kg} \times \mathrm{yr}$ isotopic exposure from the first LZ science run. A half-life of…
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The broad physics reach of the LUX-ZEPLIN (LZ) experiment covers rare phenomena beyond the direct detection of dark matter. We report precise measurements of the extremely rare decay of $^{124}$Xe through the process of two-neutrino double electron capture (2$ν$2EC), utilizing a $1.39\,\mathrm{kg} \times \mathrm{yr}$ isotopic exposure from the first LZ science run. A half-life of $T_{1/2}^{2\nu2\mathrm{EC}} = (1.09 \pm 0.14_{\text{stat}} \pm 0.05_{\text{sys}}) \times 10^{22}\,\mathrm{yr}$ is observed with a statistical significance of $8.3\,σ$, in agreement with literature. First empirical measurements of the KK capture fraction relative to other K-shell modes were conducted, and demonstrate consistency with respect to recent signal models at the $1.4\,σ$ level.
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Submitted 7 December, 2024; v1 submitted 30 August, 2024;
originally announced August 2024.
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A Next-Generation Liquid Xenon Observatory for Dark Matter and Neutrino Physics
Authors:
J. Aalbers,
K. Abe,
V. Aerne,
F. Agostini,
S. Ahmed Maouloud,
D. S. Akerib,
D. Yu. Akimov,
J. Akshat,
A. K. Al Musalhi,
F. Alder,
S. K. Alsum,
L. Althueser,
C. S. Amarasinghe,
F. D. Amaro,
A. Ames,
T. J. Anderson,
B. Andrieu,
N. Angelides,
E. Angelino,
J. Angevaare,
V. C. Antochi,
D. Antón Martin,
B. Antunovic,
E. Aprile,
H. M. Araújo
, et al. (572 additional authors not shown)
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 (WIMPs), while featuring extensive sensitivity to many alternative dark matter candidates. These detectors can also study neut…
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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 (WIMPs), 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.
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Submitted 4 March, 2022;
originally announced March 2022.
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Projected sensitivity of the LUX-ZEPLIN (LZ) experiment to the two-neutrino and neutrinoless double beta decays of $^{134}$Xe
Authors:
The LUX-ZEPLIN,
Collaboration,
:,
D. S. Akerib,
A. K. Al Musalhi,
S. K. Alsum,
C. S. Amarasinghe,
A. Ames,
T. J. Anderson,
N. Angelides,
H. M. Araujo,
J. E. Armstrong,
M. Arthurs,
X. Bai,
J. Balajthy,
S. Balashov,
J. Bang,
J. W. Bargemann,
D. Bauer,
A. Baxter,
P. Beltrame,
E. P. Bernard,
A. Bernstein,
A. Bhatti,
A. Biekert
, et al. (172 additional authors not shown)
Abstract:
The projected sensitivity of the LUX-ZEPLIN (LZ) experiment to two-neutrino and neutrinoless double beta decay of $^{134}$Xe is presented. LZ is a 10-tonne xenon time projection chamber optimized for the detection of dark matter particles, that is expected to start operating in 2021 at Sanford Underground Research Facility, USA. Its large mass of natural xenon provides an exceptional opportunity t…
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The projected sensitivity of the LUX-ZEPLIN (LZ) experiment to two-neutrino and neutrinoless double beta decay of $^{134}$Xe is presented. LZ is a 10-tonne xenon time projection chamber optimized for the detection of dark matter particles, that 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 beta decay of $^{134}$Xe, for which xenon detectors enriched in $^{136}$Xe are less effective. For the two-neutrino decay mode, LZ is predicted to exclude values of the half-life up to 1.7$\times$10$^{24}$ years at 90% confidence level (CL), and has a three-sigma observation potential of 8.7$\times$10$^{23}$ 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$\times$10$^{24}$ years at 90% CL.
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Submitted 22 November, 2021; v1 submitted 26 April, 2021;
originally announced April 2021.
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Projected sensitivity of the LUX-ZEPLIN experiment to the $0νββ$ decay of $^{136}$Xe
Authors:
D. S. Akerib,
C. W. Akerlof,
A. Alqahtani,
S. K. Alsum,
T. J. Anderson,
N. Angelides,
H. M. Araújo,
J. E. Armstrong,
M. Arthurs,
X. Bai,
J. Balajthy,
S. Balashov,
J. Bang,
A. Baxter,
J. Bensinger,
E. P. Bernard,
A. Bernstein,
A. Bhatti,
A. Biekert,
T. P. Biesiadzinski,
H. J. Birch,
K. E. Boast,
B. Boxer,
P. Brás,
J. H. Buckley
, et al. (167 additional authors not shown)
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 $^{136}$Xe neutrinoless double beta decay, taking advantage of the significant ($>$600 kg) $^{136}$Xe mass contained within the active volume of LZ without isotopic enrichment. After 1000 l…
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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 $^{136}$Xe neutrinoless double beta 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$\times$10$^{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$\times$10$^{27}$ years.
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Submitted 24 April, 2020; v1 submitted 9 December, 2019;
originally announced December 2019.
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Effect of Low Electric Fields on Alpha Scintillation Light Yield in Liquid Argon
Authors:
P. Agnes,
I. F. M. Albuquerque,
T. Alexander,
A. K. Alton,
D. M. Asner,
H. O. Back,
B. Baldin,
K. Biery,
V. Bocci,
G. Bonfini,
W. Bonivento,
M. Bossa,
B. Bottino,
A. Brigatti,
J. Brodsky,
F. Budano,
S. Bussino,
M. Cadeddu,
M. Cadoni,
F. Calaprice,
N. Canci,
A. Candela,
M. Caravati,
M. Cariello,
M. Carlini
, et al. (136 additional authors not shown)
Abstract:
Measurements were made of scintillation light yield of alpha particles from the $^{222}$Rn decay chain within the DarkSide-50 liquid argon time projection chamber. The light yield was found to increase as the applied electric field increased, with alphas in a 200 V/cm electric field exhibiting a 2% increase in light yield compared to alphas in no field.
Measurements were made of scintillation light yield of alpha particles from the $^{222}$Rn decay chain within the DarkSide-50 liquid argon time projection chamber. The light yield was found to increase as the applied electric field increased, with alphas in a 200 V/cm electric field exhibiting a 2% increase in light yield compared to alphas in no field.
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Submitted 4 November, 2016; v1 submitted 1 November, 2016;
originally announced November 2016.
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Masses of 130Te, 130Xe and double-beta-decay Q-value of 130Te
Authors:
Matthew Redshaw,
Brianna J. Mount,
Edmund G. Myers,
Frank T. Avignone III
Abstract:
The atomic masses of 130Te and 130Xe have been obtained by measuring cyclotron frequency ratios of pairs of triply-charged ions simultaneously trapped in a Penning trap. The results with one standard deviation uncertainty are M(130Te) = 129.906 222 744(16) u and M(130Xe) = 129.903 509 351(15) u. Allowing for cancellation of systematic errors in the mass difference, the double-beta-decay Q-value,…
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The atomic masses of 130Te and 130Xe have been obtained by measuring cyclotron frequency ratios of pairs of triply-charged ions simultaneously trapped in a Penning trap. The results with one standard deviation uncertainty are M(130Te) = 129.906 222 744(16) u and M(130Xe) = 129.903 509 351(15) u. Allowing for cancellation of systematic errors in the mass difference, the double-beta-decay Q-value, required for searches for the neutrino-less double-beta-decay of 130Te, is determined to be Qbb (130Te) = 2527.518(13) keV.
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Submitted 12 February, 2009;
originally announced February 2009.