REVIEW 4 cited by
Double-Weak Decays of $^{124}$Xe and $^{136}$Xe in the XENON1T and XENONnT Experiments
Not yet reviewed by Pith; the record is open.
This paper has not been read by Pith yet. Machine review is queued; the pith claim, tier, and objections will appear here once it completes.
SPECIMEN: schema-true, not a live event
T0 review · schema-true
One-sentence machine reading of the paper's core claim.
pith:XXXXXXXX · record.json · timestamp
abstract
We present results on the search for double-electron capture ($2\nu\text{ECEC}$) of $^{124}$Xe and neutrinoless double-$\beta$ decay ($0\nu\beta\beta$) of $^{136}$Xe in XENON1T. We consider captures from the K- up to the N-shell in the $2\nu\text{ECEC}$ signal model and measure a total half-life of $T_{1/2}^{2\nu\text{ECEC}}=(1.1\pm0.2_\text{stat}\pm0.1_\text{sys})\times 10^{22}\;\text{yr}$ with a $0.87\;\text{kg}\times\text{yr}$ isotope exposure. The statistical significance of the signal is $7.0\,\sigma$. We use XENON1T data with $36.16\;\text{kg}\times\text{yr}$ of $^{136}$Xe exposure to search for $0\nu\beta\beta$. We find no evidence of a signal and set a lower limit on the half-life of $T_{1/2}^{0\nu\beta\beta} > 1.2 \times 10^{24}\;\text{yr}\; \text{at}\; 90\,\%\;\text{CL}$. This is the best result from a dark matter detector without an enriched target to date. We also report projections on the sensitivity of XENONnT to $0\nu\beta\beta$. Assuming a $275\;\text{kg}\times\text{yr}$ $^{136}$Xe exposure, the expected sensitivity is $T_{1/2}^{0\nu\beta\beta} > 2.1 \times 10^{25}\;\text{yr}\; \text{at}\; 90\,\%\;\text{CL}$, corresponding to an effective Majorana mass range of $\langle m_{\beta\beta} \rangle < (0.19 - 0.59)\;\text{eV/c}^2$.
Forward citations
Cited by 4 Pith papers
-
Search for two-neutrino double electron capture in $^{36}$Ar with the DarkSide-50 detector
No excess is seen for 2EC2ν in 36Ar; DarkSide-50 sets T1/2 > 9.2×10^19 yr (90% CL) with ~12 ton-day UAr exposure and 0.007% 36Ar abundance.
-
$2\nu\beta\beta$ Spectrum in Chiral Effective Field Theory
Chiral EFT corrections to the 2νββ electron spectrum from weak magnetism and pion exchange appear at next-to-leading order and must be included in searches for new physics.
-
Radon Removal in XENONnT down to the Solar Neutrino Level
XENONnT reduced radon-222 in its liquid xenon target to 0.90 ± 0.07 micro-becquerel per kilogram, the lowest level reported for an operational dual-phase dark matter detector, matching the solar neutrino background.
-
Measurement of two-neutrino double electron capture half-life of $^{124}$Xe with PandaX-4T
PandaX-4T measured the 124Xe two-neutrino double electron capture half-life as (1.03±0.15_stat±0.08_sys)×10^22 years and a K-shell capture fraction of (65±5)% from 1.73 tonne-years of exposure.
Discussion (0). Continue with ORCID to comment.